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CVE-2023-52772 (GCVE-0-2023-52772)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:30 – Updated: 2026-08-05 09:11
VLAI
Title
af_unix: fix use-after-free in unix_stream_read_actor()
Summary
In the Linux kernel, the following vulnerability has been resolved: af_unix: fix use-after-free in unix_stream_read_actor() syzbot reported the following crash [1] After releasing unix socket lock, u->oob_skb can be changed by another thread. We must temporarily increase skb refcount to make sure this other thread will not free the skb under us. [1] BUG: KASAN: slab-use-after-free in unix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866 Read of size 4 at addr ffff88801f3b9cc4 by task syz-executor107/5297 CPU: 1 PID: 5297 Comm: syz-executor107 Not tainted 6.6.0-syzkaller-15910-gb8e3a87a627b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xc4/0x620 mm/kasan/report.c:475 kasan_report+0xda/0x110 mm/kasan/report.c:588 unix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866 unix_stream_recv_urg net/unix/af_unix.c:2587 [inline] unix_stream_read_generic+0x19a5/0x2480 net/unix/af_unix.c:2666 unix_stream_recvmsg+0x189/0x1b0 net/unix/af_unix.c:2903 sock_recvmsg_nosec net/socket.c:1044 [inline] sock_recvmsg+0xe2/0x170 net/socket.c:1066 ____sys_recvmsg+0x21f/0x5c0 net/socket.c:2803 ___sys_recvmsg+0x115/0x1a0 net/socket.c:2845 __sys_recvmsg+0x114/0x1e0 net/socket.c:2875 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fc67492c559 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc6748ab228 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007fc67492c559 RDX: 0000000040010083 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00007fc6749b6348 R08: 00007fc6748ab6c0 R09: 00007fc6748ab6c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc6749b6340 R13: 00007fc6749b634c R14: 00007ffe9fac52a0 R15: 00007ffe9fac5388 </TASK> Allocated by task 5295: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook mm/slab.h:763 [inline] slab_alloc_node mm/slub.c:3478 [inline] kmem_cache_alloc_node+0x180/0x3c0 mm/slub.c:3523 __alloc_skb+0x287/0x330 net/core/skbuff.c:641 alloc_skb include/linux/skbuff.h:1286 [inline] alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6331 sock_alloc_send_pskb+0x7e4/0x970 net/core/sock.c:2780 sock_alloc_send_skb include/net/sock.h:1884 [inline] queue_oob net/unix/af_unix.c:2147 [inline] unix_stream_sendmsg+0xb5f/0x10a0 net/unix/af_unix.c:2301 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638 __sys_sendmsg+0x117/0x1e0 net/socket.c:2667 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b Freed by task 5295: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826 slab_free mm/slub.c:3809 [inline] kmem_cache_free+0xf8/0x340 mm/slub.c:3831 kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1015 __kfree_skb net/core/skbuff.c:1073 [inline] consume_skb net/core/skbuff.c:1288 [inline] consume_skb+0xdf/0x170 net/core/skbuff.c:1282 queue_oob net/unix/af_unix.c:2178 [inline] u ---truncated---
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 15:36 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 876c14ad014d0e39c57cbfde53e13d17cdb6d645 , < 75bcfc188abf4fae9c1d5f5dc0a03540be602eef (git)
Affected: 876c14ad014d0e39c57cbfde53e13d17cdb6d645 , < d179189eec426fe4801e4b91efa1889faed12700 (git)
Affected: 876c14ad014d0e39c57cbfde53e13d17cdb6d645 , < eae0b295ce16d8c8b4114c3037993191b4bb92f0 (git)
Affected: 876c14ad014d0e39c57cbfde53e13d17cdb6d645 , < 069a3ec329ff43e7869a3d94c62cd03203016bce (git)
Affected: 876c14ad014d0e39c57cbfde53e13d17cdb6d645 , < 4b7b492615cf3017190f55444f7016812b66611d (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.140 , ≤ 5.15.* (semver)
Unaffected: 6.1.64 , ≤ 6.1.* (semver)
Unaffected: 6.5.13 , ≤ 6.5.* (semver)
Unaffected: 6.6.3 , ≤ 6.6.* (semver)
Unaffected: 6.7 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: fix use-after-free in unix_stream_read_actor()\n\nsyzbot reported the following crash [1]\n\nAfter releasing unix socket lock, u-\u003eoob_skb can be changed\nby another thread. We must temporarily increase skb refcount\nto make sure this other thread will not free the skb under us.\n\n[1]\n\nBUG: KASAN: slab-use-after-free in unix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866\nRead of size 4 at addr ffff88801f3b9cc4 by task syz-executor107/5297\n\nCPU: 1 PID: 5297 Comm: syz-executor107 Not tainted 6.6.0-syzkaller-15910-gb8e3a87a627b #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023\nCall Trace:\n\u003cTASK\u003e\n__dump_stack lib/dump_stack.c:88 [inline]\ndump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106\nprint_address_description mm/kasan/report.c:364 [inline]\nprint_report+0xc4/0x620 mm/kasan/report.c:475\nkasan_report+0xda/0x110 mm/kasan/report.c:588\nunix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866\nunix_stream_recv_urg net/unix/af_unix.c:2587 [inline]\nunix_stream_read_generic+0x19a5/0x2480 net/unix/af_unix.c:2666\nunix_stream_recvmsg+0x189/0x1b0 net/unix/af_unix.c:2903\nsock_recvmsg_nosec net/socket.c:1044 [inline]\nsock_recvmsg+0xe2/0x170 net/socket.c:1066\n____sys_recvmsg+0x21f/0x5c0 net/socket.c:2803\n___sys_recvmsg+0x115/0x1a0 net/socket.c:2845\n__sys_recvmsg+0x114/0x1e0 net/socket.c:2875\ndo_syscall_x64 arch/x86/entry/common.c:51 [inline]\ndo_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\nRIP: 0033:0x7fc67492c559\nCode: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007fc6748ab228 EFLAGS: 00000246 ORIG_RAX: 000000000000002f\nRAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007fc67492c559\nRDX: 0000000040010083 RSI: 0000000020000140 RDI: 0000000000000004\nRBP: 00007fc6749b6348 R08: 00007fc6748ab6c0 R09: 00007fc6748ab6c0\nR10: 0000000000000000 R11: 0000000000000246 R12: 00007fc6749b6340\nR13: 00007fc6749b634c R14: 00007ffe9fac52a0 R15: 00007ffe9fac5388\n\u003c/TASK\u003e\n\nAllocated by task 5295:\nkasan_save_stack+0x33/0x50 mm/kasan/common.c:45\nkasan_set_track+0x25/0x30 mm/kasan/common.c:52\n__kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328\nkasan_slab_alloc include/linux/kasan.h:188 [inline]\nslab_post_alloc_hook mm/slab.h:763 [inline]\nslab_alloc_node mm/slub.c:3478 [inline]\nkmem_cache_alloc_node+0x180/0x3c0 mm/slub.c:3523\n__alloc_skb+0x287/0x330 net/core/skbuff.c:641\nalloc_skb include/linux/skbuff.h:1286 [inline]\nalloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6331\nsock_alloc_send_pskb+0x7e4/0x970 net/core/sock.c:2780\nsock_alloc_send_skb include/net/sock.h:1884 [inline]\nqueue_oob net/unix/af_unix.c:2147 [inline]\nunix_stream_sendmsg+0xb5f/0x10a0 net/unix/af_unix.c:2301\nsock_sendmsg_nosec net/socket.c:730 [inline]\n__sock_sendmsg+0xd5/0x180 net/socket.c:745\n____sys_sendmsg+0x6ac/0x940 net/socket.c:2584\n___sys_sendmsg+0x135/0x1d0 net/socket.c:2638\n__sys_sendmsg+0x117/0x1e0 net/socket.c:2667\ndo_syscall_x64 arch/x86/entry/common.c:51 [inline]\ndo_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nFreed by task 5295:\nkasan_save_stack+0x33/0x50 mm/kasan/common.c:45\nkasan_set_track+0x25/0x30 mm/kasan/common.c:52\nkasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522\n____kasan_slab_free mm/kasan/common.c:236 [inline]\n____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200\nkasan_slab_free include/linux/kasan.h:164 [inline]\nslab_free_hook mm/slub.c:1800 [inline]\nslab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826\nslab_free mm/slub.c:3809 [inline]\nkmem_cache_free+0xf8/0x340 mm/slub.c:3831\nkfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1015\n__kfree_skb net/core/skbuff.c:1073 [inline]\nconsume_skb net/core/skbuff.c:1288 [inline]\nconsume_skb+0xdf/0x170 net/core/skbuff.c:1282\nqueue_oob net/unix/af_unix.c:2178 [inline]\nu\n---truncated---"
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              "value": "AV:L - The bug is reached only via local AF_UNIX stream socket syscalls (socketpair/sendmsg/recvmsg with MSG_OOB); Unix domain sockets are local IPC and are not driven by remote network peers.\nAC:L - The attacker fully controls both sides of the race\u2014one thread doing recvmsg(MSG_OOB|MSG_PEEK) and another doing sendmsg(MSG_OOB) on the same connected pair\u2014and can retry until the window after unix_state_unlock is hit; CONFIG_AF_UNIX_OOB is default y.\nPR:L - Any unprivileged local user can create an AF_UNIX SOCK_STREAM socketpair and send/receive MSG_OOB data with no capabilities, privileged setsockopt, or user-namespace setup required.\nUI:N - Exploitation runs entirely on the attacker\u0027s own socketpair via their own syscalls; no victim action or interaction is required.\nS:U - The use-after-free corrupts kernel heap state within the same security authority and yields standard local privilege escalation, not a VM/IOMMU boundary cross.\nC:H - Use-after-free of an sk_buff lets recv copy from a freed skbuff_head_cache object into userspace; with heap spraying this becomes an arbitrary kernel memory read primitive.\nI:H - UAF of a sprayable sk_buff enables heap reuse and type confusion with further skb operations, providing a classic write/control-flow hijack primitive for arbitrary code execution.\nA:H - Dereferencing the freed skb produces a KASAN slab-use-after-free (and without KASAN, oops/panic from wild pointer use), so any unprivileged user can crash the kernel."
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    },
    "fkie_nvd": {
      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.15\", \"versionEndExcluding\": \"5.15.140\", \"matchCriteriaId\": \"8A5D0FDE-F72D-44B7-B376-4D382F5A5AE1\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.16\", \"versionEndExcluding\": \"6.1.64\", \"matchCriteriaId\": \"8D7C884A-CAA2-4EA2-9FEB-5CE776D7B05F\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.2\", \"versionEndExcluding\": \"6.5.13\", \"matchCriteriaId\": \"674C4F82-C336-4B49-BF64-1DE422E889C4\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.6\", \"versionEndExcluding\": \"6.6.3\", \"matchCriteriaId\": \"B58252FA-A49C-411F-9B28-DC5FE44BC5A0\"}]}]}]",
      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\naf_unix: fix use-after-free in unix_stream_read_actor()\\n\\nsyzbot reported the following crash [1]\\n\\nAfter releasing unix socket lock, u-\u003eoob_skb can be changed\\nby another thread. We must temporarily increase skb refcount\\nto make sure this other thread will not free the skb under us.\\n\\n[1]\\n\\nBUG: KASAN: slab-use-after-free in unix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866\\nRead of size 4 at addr ffff88801f3b9cc4 by task syz-executor107/5297\\n\\nCPU: 1 PID: 5297 Comm: syz-executor107 Not tainted 6.6.0-syzkaller-15910-gb8e3a87a627b #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023\\nCall Trace:\\n\u003cTASK\u003e\\n__dump_stack lib/dump_stack.c:88 [inline]\\ndump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106\\nprint_address_description mm/kasan/report.c:364 [inline]\\nprint_report+0xc4/0x620 mm/kasan/report.c:475\\nkasan_report+0xda/0x110 mm/kasan/report.c:588\\nunix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866\\nunix_stream_recv_urg net/unix/af_unix.c:2587 [inline]\\nunix_stream_read_generic+0x19a5/0x2480 net/unix/af_unix.c:2666\\nunix_stream_recvmsg+0x189/0x1b0 net/unix/af_unix.c:2903\\nsock_recvmsg_nosec net/socket.c:1044 [inline]\\nsock_recvmsg+0xe2/0x170 net/socket.c:1066\\n____sys_recvmsg+0x21f/0x5c0 net/socket.c:2803\\n___sys_recvmsg+0x115/0x1a0 net/socket.c:2845\\n__sys_recvmsg+0x114/0x1e0 net/socket.c:2875\\ndo_syscall_x64 arch/x86/entry/common.c:51 [inline]\\ndo_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82\\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\\nRIP: 0033:0x7fc67492c559\\nCode: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\\nRSP: 002b:00007fc6748ab228 EFLAGS: 00000246 ORIG_RAX: 000000000000002f\\nRAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007fc67492c559\\nRDX: 0000000040010083 RSI: 0000000020000140 RDI: 0000000000000004\\nRBP: 00007fc6749b6348 R08: 00007fc6748ab6c0 R09: 00007fc6748ab6c0\\nR10: 0000000000000000 R11: 0000000000000246 R12: 00007fc6749b6340\\nR13: 00007fc6749b634c R14: 00007ffe9fac52a0 R15: 00007ffe9fac5388\\n\u003c/TASK\u003e\\n\\nAllocated by task 5295:\\nkasan_save_stack+0x33/0x50 mm/kasan/common.c:45\\nkasan_set_track+0x25/0x30 mm/kasan/common.c:52\\n__kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328\\nkasan_slab_alloc include/linux/kasan.h:188 [inline]\\nslab_post_alloc_hook mm/slab.h:763 [inline]\\nslab_alloc_node mm/slub.c:3478 [inline]\\nkmem_cache_alloc_node+0x180/0x3c0 mm/slub.c:3523\\n__alloc_skb+0x287/0x330 net/core/skbuff.c:641\\nalloc_skb include/linux/skbuff.h:1286 [inline]\\nalloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6331\\nsock_alloc_send_pskb+0x7e4/0x970 net/core/sock.c:2780\\nsock_alloc_send_skb include/net/sock.h:1884 [inline]\\nqueue_oob net/unix/af_unix.c:2147 [inline]\\nunix_stream_sendmsg+0xb5f/0x10a0 net/unix/af_unix.c:2301\\nsock_sendmsg_nosec net/socket.c:730 [inline]\\n__sock_sendmsg+0xd5/0x180 net/socket.c:745\\n____sys_sendmsg+0x6ac/0x940 net/socket.c:2584\\n___sys_sendmsg+0x135/0x1d0 net/socket.c:2638\\n__sys_sendmsg+0x117/0x1e0 net/socket.c:2667\\ndo_syscall_x64 arch/x86/entry/common.c:51 [inline]\\ndo_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82\\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\\n\\nFreed by task 5295:\\nkasan_save_stack+0x33/0x50 mm/kasan/common.c:45\\nkasan_set_track+0x25/0x30 mm/kasan/common.c:52\\nkasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522\\n____kasan_slab_free mm/kasan/common.c:236 [inline]\\n____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200\\nkasan_slab_free include/linux/kasan.h:164 [inline]\\nslab_free_hook mm/slub.c:1800 [inline]\\nslab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826\\nslab_free mm/slub.c:3809 [inline]\\nkmem_cache_free+0xf8/0x340 mm/slub.c:3831\\nkfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1015\\n__kfree_skb net/core/skbuff.c:1073 [inline]\\nconsume_skb net/core/skbuff.c:1288 [inline]\\nconsume_skb+0xdf/0x170 net/core/skbuff.c:1282\\nqueue_oob net/unix/af_unix.c:2178 [inline]\\nu\\n---truncated---\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se resolvi\\u00f3 la siguiente vulnerabilidad: af_unix: corrige use-after-free en unix_stream_read_actor() syzbot inform\\u00f3 el siguiente bloqueo [1] Despu\\u00e9s de liberar el bloqueo del socket Unix, otro subproceso puede cambiar u-\u0026gt;oob_skb. Debemos aumentar temporalmente el recuento de skb para asegurarnos de que este otro hilo no libere el skb que est\\u00e1 debajo de nosotros. [1] ERROR: KASAN: slab-use-after-free en unix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866 Lectura de tama\\u00f1o 4 en la direcci\\u00f3n ffff88801f3b9cc4 por tarea syz-executor107/5297 CPU: 1 PID: 5297 Comm : syz-executor107 No contaminado 6.6.0-syzkaller-15910-gb8e3a87a627b #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/10/2023 Seguimiento de llamadas:  __dump_stack lib/dump_stack.c:88 [en l\\u00ednea] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [en l\\u00ednea] print_report+0xc4/0x620 mm/kasan/report.c:475 kasan_report+0xda/0x110 mm/kasan /report.c:588 unix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866 unix_stream_recv_urg net/unix/af_unix.c:2587 [en l\\u00ednea] unix_stream_read_generic+0x19a5/0x2480 net/unix/af_unix.c:2666 +0x189 /0x1b0 net/unix/af_unix.c:2903 sock_recvmsg_nosec net/socket.c:1044 [en l\\u00ednea] sock_recvmsg+0xe2/0x170 net/socket.c:1066 ____sys_recvmsg+0x21f/0x5c0 net/socket.c:2803 ___sys_recv mensaje+0x115/ 0x1a0 net/socket.c:2845 __sys_recvmsg+0x114/0x1e0 net/socket.c:2875 do_syscall_x64 arch/x86/entry/common.c:51 [en l\\u00ednea] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c: 82 Entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fc67492c559 C\\u00f3digo: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d 6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u0026lt;48\u0026gt; 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc6748ab228 EFLAGS: 00000246 ORIG_RAX: 0000002f RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007fc67492c559 RDX : 0000000040010083 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00007fc6749b6348 R08: 00007fc6748ab6c0 R09: 00007fc6748ab6c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc6749b6340 R13: 00007fc6749b634c R14: 00007ffe9fac52a0 R15: 00007ffe9fac5388  tarea 5295: kasan_save_stack+0x33/0x50 mm /kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [en l\\u00ednea] slab_post_alloc_hook mm/slab.h:763 [en l\\u00ednea] slab_alloc_node mm/slub.c:3478 [en l\\u00ednea] kmem_cache_alloc_node+0x180/0x3c0 mm/slub.c:3523 __alloc_skb+0x287/0x330 net/core/skbuff.c:641 alloc_skb include/ linux/skbuff.h:1286 [en l\\u00ednea] alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6331 sock_alloc_send_pskb+0x7e4/0x970 net/core/sock.c:2780 sock_alloc_send_skb include/net/sock.h:1884 [en l\\u00ednea ] queue_oob net/unix/af_unix.c:2147 [en l\\u00ednea] unix_stream_sendmsg+0xb5f/0x10a0 net/unix/af_unix.c:2301 sock_sendmsg_nosec net/socket.c:730 [en l\\u00ednea] __sock_sendmsg+0xd5/0x180 net/socket.c: 745 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638 __sys_sendmsg+0x117/0x1e0 net/socket.c:2667 do_syscall_x64 arch/x86/entry/ common.c:51 [ Inline] do_syscall_64+0x3f/0x110 Arch/x86/entry/Common.c: 82 entry_syscall_64_after_hwframe+0x63/0x6b liberado por tarea 5295: kasan_save_stack+0x33/0x50 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [en l\\u00ednea] ____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200 kasan_slab_free include/ linux/kasan.h:164 [en l\\u00ednea] slab_free_hook mm/slub.c:1800 [en l\\u00ednea] slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826 slab_free mm/slub.c:3809 [en l\\u00ednea] kmem_cache_free+0xf8/0x340 mm /slub.c:3831 kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1015 __kfree_skb net/core/skbuff.c:1073 [en l\\u00ednea] consume_skb net/core/skbuff.c:1288 [en l\\u00ednea] consume_skb+0xdf/ 0x170 net/core/skbuff.c:1282 queue_oob net/unix/af_unix.c:2178 [en l\\u00ednea] u ---truncado---\"}]",
      "id": "CVE-2023-52772",
      "lastModified": "2024-11-21T08:40:33.377",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 5.9}]}",
      "published": "2024-05-21T16:15:16.390",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/069a3ec329ff43e7869a3d94c62cd03203016bce\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/4b7b492615cf3017190f55444f7016812b66611d\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/75bcfc188abf4fae9c1d5f5dc0a03540be602eef\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/d179189eec426fe4801e4b91efa1889faed12700\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/eae0b295ce16d8c8b4114c3037993191b4bb92f0\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/069a3ec329ff43e7869a3d94c62cd03203016bce\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/4b7b492615cf3017190f55444f7016812b66611d\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/75bcfc188abf4fae9c1d5f5dc0a03540be602eef\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/d179189eec426fe4801e4b91efa1889faed12700\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/eae0b295ce16d8c8b4114c3037993191b4bb92f0\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-416\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-52772\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T16:15:16.390\",\"lastModified\":\"2026-08-04T10:18:40.957\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\naf_unix: fix use-after-free in unix_stream_read_actor()\\n\\nsyzbot reported the following crash [1]\\n\\nAfter releasing unix socket lock, u-\u003eoob_skb can be changed\\nby another thread. We must temporarily increase skb refcount\\nto make sure this other thread will not free the skb under us.\\n\\n[1]\\n\\nBUG: KASAN: slab-use-after-free in unix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866\\nRead of size 4 at addr ffff88801f3b9cc4 by task syz-executor107/5297\\n\\nCPU: 1 PID: 5297 Comm: syz-executor107 Not tainted 6.6.0-syzkaller-15910-gb8e3a87a627b #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023\\nCall Trace:\\n\u003cTASK\u003e\\n__dump_stack lib/dump_stack.c:88 [inline]\\ndump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106\\nprint_address_description mm/kasan/report.c:364 [inline]\\nprint_report+0xc4/0x620 mm/kasan/report.c:475\\nkasan_report+0xda/0x110 mm/kasan/report.c:588\\nunix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866\\nunix_stream_recv_urg net/unix/af_unix.c:2587 [inline]\\nunix_stream_read_generic+0x19a5/0x2480 net/unix/af_unix.c:2666\\nunix_stream_recvmsg+0x189/0x1b0 net/unix/af_unix.c:2903\\nsock_recvmsg_nosec net/socket.c:1044 [inline]\\nsock_recvmsg+0xe2/0x170 net/socket.c:1066\\n____sys_recvmsg+0x21f/0x5c0 net/socket.c:2803\\n___sys_recvmsg+0x115/0x1a0 net/socket.c:2845\\n__sys_recvmsg+0x114/0x1e0 net/socket.c:2875\\ndo_syscall_x64 arch/x86/entry/common.c:51 [inline]\\ndo_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82\\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\\nRIP: 0033:0x7fc67492c559\\nCode: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\\nRSP: 002b:00007fc6748ab228 EFLAGS: 00000246 ORIG_RAX: 000000000000002f\\nRAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007fc67492c559\\nRDX: 0000000040010083 RSI: 0000000020000140 RDI: 0000000000000004\\nRBP: 00007fc6749b6348 R08: 00007fc6748ab6c0 R09: 00007fc6748ab6c0\\nR10: 0000000000000000 R11: 0000000000000246 R12: 00007fc6749b6340\\nR13: 00007fc6749b634c R14: 00007ffe9fac52a0 R15: 00007ffe9fac5388\\n\u003c/TASK\u003e\\n\\nAllocated by task 5295:\\nkasan_save_stack+0x33/0x50 mm/kasan/common.c:45\\nkasan_set_track+0x25/0x30 mm/kasan/common.c:52\\n__kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328\\nkasan_slab_alloc include/linux/kasan.h:188 [inline]\\nslab_post_alloc_hook mm/slab.h:763 [inline]\\nslab_alloc_node mm/slub.c:3478 [inline]\\nkmem_cache_alloc_node+0x180/0x3c0 mm/slub.c:3523\\n__alloc_skb+0x287/0x330 net/core/skbuff.c:641\\nalloc_skb include/linux/skbuff.h:1286 [inline]\\nalloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6331\\nsock_alloc_send_pskb+0x7e4/0x970 net/core/sock.c:2780\\nsock_alloc_send_skb include/net/sock.h:1884 [inline]\\nqueue_oob net/unix/af_unix.c:2147 [inline]\\nunix_stream_sendmsg+0xb5f/0x10a0 net/unix/af_unix.c:2301\\nsock_sendmsg_nosec net/socket.c:730 [inline]\\n__sock_sendmsg+0xd5/0x180 net/socket.c:745\\n____sys_sendmsg+0x6ac/0x940 net/socket.c:2584\\n___sys_sendmsg+0x135/0x1d0 net/socket.c:2638\\n__sys_sendmsg+0x117/0x1e0 net/socket.c:2667\\ndo_syscall_x64 arch/x86/entry/common.c:51 [inline]\\ndo_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82\\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\\n\\nFreed by task 5295:\\nkasan_save_stack+0x33/0x50 mm/kasan/common.c:45\\nkasan_set_track+0x25/0x30 mm/kasan/common.c:52\\nkasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522\\n____kasan_slab_free mm/kasan/common.c:236 [inline]\\n____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200\\nkasan_slab_free include/linux/kasan.h:164 [inline]\\nslab_free_hook mm/slub.c:1800 [inline]\\nslab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826\\nslab_free mm/slub.c:3809 [inline]\\nkmem_cache_free+0xf8/0x340 mm/slub.c:3831\\nkfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1015\\n__kfree_skb net/core/skbuff.c:1073 [inline]\\nconsume_skb net/core/skbuff.c:1288 [inline]\\nconsume_skb+0xdf/0x170 net/core/skbuff.c:1282\\nqueue_oob net/unix/af_unix.c:2178 [inline]\\nu\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: af_unix: corrige use-after-free en unix_stream_read_actor() syzbot inform\u00f3 el siguiente bloqueo [1] Despu\u00e9s de liberar el bloqueo del socket Unix, otro subproceso puede cambiar u-\u0026gt;oob_skb. Debemos aumentar temporalmente el recuento de skb para asegurarnos de que este otro hilo no libere el skb que est\u00e1 debajo de nosotros. [1] ERROR: KASAN: slab-use-after-free en unix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866 Lectura de tama\u00f1o 4 en la direcci\u00f3n ffff88801f3b9cc4 por tarea syz-executor107/5297 CPU: 1 PID: 5297 Comm : syz-executor107 No contaminado 6.6.0-syzkaller-15910-gb8e3a87a627b #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/10/2023 Seguimiento de llamadas:  __dump_stack lib/dump_stack.c:88 [en l\u00ednea] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [en l\u00ednea] print_report+0xc4/0x620 mm/kasan/report.c:475 kasan_report+0xda/0x110 mm/kasan /report.c:588 unix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866 unix_stream_recv_urg net/unix/af_unix.c:2587 [en l\u00ednea] unix_stream_read_generic+0x19a5/0x2480 net/unix/af_unix.c:2666 +0x189 /0x1b0 net/unix/af_unix.c:2903 sock_recvmsg_nosec net/socket.c:1044 [en l\u00ednea] sock_recvmsg+0xe2/0x170 net/socket.c:1066 ____sys_recvmsg+0x21f/0x5c0 net/socket.c:2803 ___sys_recv mensaje+0x115/ 0x1a0 net/socket.c:2845 __sys_recvmsg+0x114/0x1e0 net/socket.c:2875 do_syscall_x64 arch/x86/entry/common.c:51 [en l\u00ednea] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c: 82 Entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fc67492c559 C\u00f3digo: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d 6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u0026lt;48\u0026gt; 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc6748ab228 EFLAGS: 00000246 ORIG_RAX: 0000002f RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007fc67492c559 RDX : 0000000040010083 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00007fc6749b6348 R08: 00007fc6748ab6c0 R09: 00007fc6748ab6c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc6749b6340 R13: 00007fc6749b634c R14: 00007ffe9fac52a0 R15: 00007ffe9fac5388  tarea 5295: kasan_save_stack+0x33/0x50 mm /kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [en l\u00ednea] slab_post_alloc_hook mm/slab.h:763 [en l\u00ednea] slab_alloc_node mm/slub.c:3478 [en l\u00ednea] kmem_cache_alloc_node+0x180/0x3c0 mm/slub.c:3523 __alloc_skb+0x287/0x330 net/core/skbuff.c:641 alloc_skb include/ linux/skbuff.h:1286 [en l\u00ednea] alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6331 sock_alloc_send_pskb+0x7e4/0x970 net/core/sock.c:2780 sock_alloc_send_skb include/net/sock.h:1884 [en l\u00ednea ] queue_oob net/unix/af_unix.c:2147 [en l\u00ednea] unix_stream_sendmsg+0xb5f/0x10a0 net/unix/af_unix.c:2301 sock_sendmsg_nosec net/socket.c:730 [en l\u00ednea] __sock_sendmsg+0xd5/0x180 net/socket.c: 745 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638 __sys_sendmsg+0x117/0x1e0 net/socket.c:2667 do_syscall_x64 arch/x86/entry/ common.c:51 [ Inline] do_syscall_64+0x3f/0x110 Arch/x86/entry/Common.c: 82 entry_syscall_64_after_hwframe+0x63/0x6b liberado por tarea 5295: kasan_save_stack+0x33/0x50 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [en l\u00ednea] ____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200 kasan_slab_free include/ linux/kasan.h:164 [en l\u00ednea] slab_free_hook mm/slub.c:1800 [en l\u00ednea] slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826 slab_free mm/slub.c:3809 [en l\u00ednea] kmem_cache_free+0xf8/0x340 mm /slub.c:3831 kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1015 __kfree_skb net/core/skbuff.c:1073 [en l\u00ednea] consume_skb net/core/skbuff.c:1288 [en l\u00ednea] consume_skb+0xdf/ 0x170 net/core/skbuff.c:1282 queue_oob net/unix/af_unix.c:2178 [en l\u00ednea] u ---truncado---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/unix/af_unix.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"876c14ad014d0e39c57cbfde53e13d17cdb6d645\",\"lessThan\":\"75bcfc188abf4fae9c1d5f5dc0a03540be602eef\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"876c14ad014d0e39c57cbfde53e13d17cdb6d645\",\"lessThan\":\"d179189eec426fe4801e4b91efa1889faed12700\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"876c14ad014d0e39c57cbfde53e13d17cdb6d645\",\"lessThan\":\"eae0b295ce16d8c8b4114c3037993191b4bb92f0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"876c14ad014d0e39c57cbfde53e13d17cdb6d645\",\"lessThan\":\"069a3ec329ff43e7869a3d94c62cd03203016bce\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"876c14ad014d0e39c57cbfde53e13d17cdb6d645\",\"lessThan\":\"4b7b492615cf3017190f55444f7016812b66611d\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/unix/af_unix.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.15\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.15\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.140\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.64\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.5.13\",\"lessThanOrEqual\":\"6.5.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.3\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.7\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-09-10T15:36:59.720971Z\",\"id\":\"CVE-2023-52772\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T19:24:31+00:00",
      "cve": "CVE-2023-52772",
      "id": "CVE-2023-52772",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "42",
      "product_status:known_not_affected": "156",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: af_unix: fix use-after-free in unix_stream_read_actor()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-52772.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-03T16:50:05Z",
      "cve": "CVE-2023-52772",
      "id": "CVE-2023-52772",
      "initial_release_date": "2024-05-23T02:57:05Z",
      "product_status:known_affected": "394",
      "product_status:known_not_affected": "332",
      "product_status:recommended": "356",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-52772",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-52772.json",
      "version": "77"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/75bcfc188abf4fae9c1d5f5dc0a03540be602eef\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/d179189eec426fe4801e4b91efa1889faed12700\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/eae0b295ce16d8c8b4114c3037993191b4bb92f0\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/069a3ec329ff43e7869a3d94c62cd03203016bce\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/4b7b492615cf3017190f55444f7016812b66611d\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T23:11:35.836Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-52772\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:36:59.720971Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:17.049Z\"}}], \"cna\": {\"title\": \"af_unix: fix use-after-free in unix_stream_read_actor()\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:L - The bug is reached only via local AF_UNIX stream socket syscalls (socketpair/sendmsg/recvmsg with MSG_OOB); Unix domain sockets are local IPC and are not driven by remote network peers.\\nAC:L - The attacker fully controls both sides of the race\\u2014one thread doing recvmsg(MSG_OOB|MSG_PEEK) and another doing sendmsg(MSG_OOB) on the same connected pair\\u2014and can retry until the window after unix_state_unlock is hit; CONFIG_AF_UNIX_OOB is default y.\\nPR:L - Any unprivileged local user can create an AF_UNIX SOCK_STREAM socketpair and send/receive MSG_OOB data with no capabilities, privileged setsockopt, or user-namespace setup required.\\nUI:N - Exploitation runs entirely on the attacker\u0027s own socketpair via their own syscalls; no victim action or interaction is required.\\nS:U - The use-after-free corrupts kernel heap state within the same security authority and yields standard local privilege escalation, not a VM/IOMMU boundary cross.\\nC:H - Use-after-free of an sk_buff lets recv copy from a freed skbuff_head_cache object into userspace; with heap spraying this becomes an arbitrary kernel memory read primitive.\\nI:H - UAF of a sprayable sk_buff enables heap reuse and type confusion with further skb operations, providing a classic write/control-flow hijack primitive for arbitrary code execution.\\nA:H - Dereferencing the freed skb produces a KASAN slab-use-after-free (and without KASAN, oops/panic from wild pointer use), so any unprivileged user can crash the kernel.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"876c14ad014d0e39c57cbfde53e13d17cdb6d645\", \"lessThan\": \"75bcfc188abf4fae9c1d5f5dc0a03540be602eef\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"876c14ad014d0e39c57cbfde53e13d17cdb6d645\", \"lessThan\": \"d179189eec426fe4801e4b91efa1889faed12700\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"876c14ad014d0e39c57cbfde53e13d17cdb6d645\", \"lessThan\": \"eae0b295ce16d8c8b4114c3037993191b4bb92f0\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"876c14ad014d0e39c57cbfde53e13d17cdb6d645\", \"lessThan\": \"069a3ec329ff43e7869a3d94c62cd03203016bce\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"876c14ad014d0e39c57cbfde53e13d17cdb6d645\", \"lessThan\": \"4b7b492615cf3017190f55444f7016812b66611d\", \"versionType\": \"git\"}], \"programFiles\": [\"net/unix/af_unix.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.15\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.15\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.15.140\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.64\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.5.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.5.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.7\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/unix/af_unix.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/75bcfc188abf4fae9c1d5f5dc0a03540be602eef\"}, {\"url\": \"https://git.kernel.org/stable/c/d179189eec426fe4801e4b91efa1889faed12700\"}, {\"url\": \"https://git.kernel.org/stable/c/eae0b295ce16d8c8b4114c3037993191b4bb92f0\"}, {\"url\": \"https://git.kernel.org/stable/c/069a3ec329ff43e7869a3d94c62cd03203016bce\"}, {\"url\": \"https://git.kernel.org/stable/c/4b7b492615cf3017190f55444f7016812b66611d\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\naf_unix: fix use-after-free in unix_stream_read_actor()\\n\\nsyzbot reported the following crash [1]\\n\\nAfter releasing unix socket lock, u-\u003eoob_skb can be changed\\nby another thread. We must temporarily increase skb refcount\\nto make sure this other thread will not free the skb under us.\\n\\n[1]\\n\\nBUG: KASAN: slab-use-after-free in unix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866\\nRead of size 4 at addr ffff88801f3b9cc4 by task syz-executor107/5297\\n\\nCPU: 1 PID: 5297 Comm: syz-executor107 Not tainted 6.6.0-syzkaller-15910-gb8e3a87a627b #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023\\nCall Trace:\\n\u003cTASK\u003e\\n__dump_stack lib/dump_stack.c:88 [inline]\\ndump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106\\nprint_address_description mm/kasan/report.c:364 [inline]\\nprint_report+0xc4/0x620 mm/kasan/report.c:475\\nkasan_report+0xda/0x110 mm/kasan/report.c:588\\nunix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866\\nunix_stream_recv_urg net/unix/af_unix.c:2587 [inline]\\nunix_stream_read_generic+0x19a5/0x2480 net/unix/af_unix.c:2666\\nunix_stream_recvmsg+0x189/0x1b0 net/unix/af_unix.c:2903\\nsock_recvmsg_nosec net/socket.c:1044 [inline]\\nsock_recvmsg+0xe2/0x170 net/socket.c:1066\\n____sys_recvmsg+0x21f/0x5c0 net/socket.c:2803\\n___sys_recvmsg+0x115/0x1a0 net/socket.c:2845\\n__sys_recvmsg+0x114/0x1e0 net/socket.c:2875\\ndo_syscall_x64 arch/x86/entry/common.c:51 [inline]\\ndo_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82\\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\\nRIP: 0033:0x7fc67492c559\\nCode: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\\nRSP: 002b:00007fc6748ab228 EFLAGS: 00000246 ORIG_RAX: 000000000000002f\\nRAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007fc67492c559\\nRDX: 0000000040010083 RSI: 0000000020000140 RDI: 0000000000000004\\nRBP: 00007fc6749b6348 R08: 00007fc6748ab6c0 R09: 00007fc6748ab6c0\\nR10: 0000000000000000 R11: 0000000000000246 R12: 00007fc6749b6340\\nR13: 00007fc6749b634c R14: 00007ffe9fac52a0 R15: 00007ffe9fac5388\\n\u003c/TASK\u003e\\n\\nAllocated by task 5295:\\nkasan_save_stack+0x33/0x50 mm/kasan/common.c:45\\nkasan_set_track+0x25/0x30 mm/kasan/common.c:52\\n__kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328\\nkasan_slab_alloc include/linux/kasan.h:188 [inline]\\nslab_post_alloc_hook mm/slab.h:763 [inline]\\nslab_alloc_node mm/slub.c:3478 [inline]\\nkmem_cache_alloc_node+0x180/0x3c0 mm/slub.c:3523\\n__alloc_skb+0x287/0x330 net/core/skbuff.c:641\\nalloc_skb include/linux/skbuff.h:1286 [inline]\\nalloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6331\\nsock_alloc_send_pskb+0x7e4/0x970 net/core/sock.c:2780\\nsock_alloc_send_skb include/net/sock.h:1884 [inline]\\nqueue_oob net/unix/af_unix.c:2147 [inline]\\nunix_stream_sendmsg+0xb5f/0x10a0 net/unix/af_unix.c:2301\\nsock_sendmsg_nosec net/socket.c:730 [inline]\\n__sock_sendmsg+0xd5/0x180 net/socket.c:745\\n____sys_sendmsg+0x6ac/0x940 net/socket.c:2584\\n___sys_sendmsg+0x135/0x1d0 net/socket.c:2638\\n__sys_sendmsg+0x117/0x1e0 net/socket.c:2667\\ndo_syscall_x64 arch/x86/entry/common.c:51 [inline]\\ndo_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82\\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\\n\\nFreed by task 5295:\\nkasan_save_stack+0x33/0x50 mm/kasan/common.c:45\\nkasan_set_track+0x25/0x30 mm/kasan/common.c:52\\nkasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522\\n____kasan_slab_free mm/kasan/common.c:236 [inline]\\n____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200\\nkasan_slab_free include/linux/kasan.h:164 [inline]\\nslab_free_hook mm/slub.c:1800 [inline]\\nslab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826\\nslab_free mm/slub.c:3809 [inline]\\nkmem_cache_free+0xf8/0x340 mm/slub.c:3831\\nkfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1015\\n__kfree_skb net/core/skbuff.c:1073 [inline]\\nconsume_skb net/core/skbuff.c:1288 [inline]\\nconsume_skb+0xdf/0x170 net/core/skbuff.c:1282\\nqueue_oob net/unix/af_unix.c:2178 [inline]\\nu\\n---truncated---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.140\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.64\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5.13\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.3\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7\", \"versionStartIncluding\": \"5.15\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T09:11:21.348Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-52772\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T09:11:21.348Z\", \"dateReserved\": \"2024-05-21T15:19:24.239Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T15:30:54.292Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.