CVE-2024-41041 (GCVE-0-2024-41041)

Vulnerability from cvelistv5 – Published: 2024-07-29 14:31 – Updated: 2026-05-11 20:25
VLAI?
Title
udp: Set SOCK_RCU_FREE earlier in udp_lib_get_port().
Summary
In the Linux kernel, the following vulnerability has been resolved: udp: Set SOCK_RCU_FREE earlier in udp_lib_get_port(). syzkaller triggered the warning [0] in udp_v4_early_demux(). In udp_v[46]_early_demux() and sk_lookup(), we do not touch the refcount of the looked-up sk and use sock_pfree() as skb->destructor, so we check SOCK_RCU_FREE to ensure that the sk is safe to access during the RCU grace period. Currently, SOCK_RCU_FREE is flagged for a bound socket after being put into the hash table. Moreover, the SOCK_RCU_FREE check is done too early in udp_v[46]_early_demux() and sk_lookup(), so there could be a small race window: CPU1 CPU2 ---- ---- udp_v4_early_demux() udp_lib_get_port() | |- hlist_add_head_rcu() |- sk = __udp4_lib_demux_lookup() | |- DEBUG_NET_WARN_ON_ONCE(sk_is_refcounted(sk)); `- sock_set_flag(sk, SOCK_RCU_FREE) We had the same bug in TCP and fixed it in commit 871019b22d1b ("net: set SOCK_RCU_FREE before inserting socket into hashtable"). Let's apply the same fix for UDP. [0]: WARNING: CPU: 0 PID: 11198 at net/ipv4/udp.c:2599 udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599 Modules linked in: CPU: 0 PID: 11198 Comm: syz-executor.1 Not tainted 6.9.0-g93bda33046e7 #13 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014 RIP: 0010:udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599 Code: c5 7a 15 fe bb 01 00 00 00 44 89 e9 31 ff d3 e3 81 e3 bf ef ff ff 89 de e8 2c 74 15 fe 85 db 0f 85 02 06 00 00 e8 9f 7a 15 fe <0f> 0b e8 98 7a 15 fe 49 8d 7e 60 e8 4f 39 2f fe 49 c7 46 60 20 52 RSP: 0018:ffffc9000ce3fa58 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8318c92c RDX: ffff888036ccde00 RSI: ffffffff8318c2f1 RDI: 0000000000000001 RBP: ffff88805a2dd6e0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0001ffffffffffff R12: ffff88805a2dd680 R13: 0000000000000007 R14: ffff88800923f900 R15: ffff88805456004e FS: 00007fc449127640(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc449126e38 CR3: 000000003de4b002 CR4: 0000000000770ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 PKRU: 55555554 Call Trace: <TASK> ip_rcv_finish_core.constprop.0+0xbdd/0xd20 net/ipv4/ip_input.c:349 ip_rcv_finish+0xda/0x150 net/ipv4/ip_input.c:447 NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip_rcv+0x16c/0x180 net/ipv4/ip_input.c:569 __netif_receive_skb_one_core+0xb3/0xe0 net/core/dev.c:5624 __netif_receive_skb+0x21/0xd0 net/core/dev.c:5738 netif_receive_skb_internal net/core/dev.c:5824 [inline] netif_receive_skb+0x271/0x300 net/core/dev.c:5884 tun_rx_batched drivers/net/tun.c:1549 [inline] tun_get_user+0x24db/0x2c50 drivers/net/tun.c:2002 tun_chr_write_iter+0x107/0x1a0 drivers/net/tun.c:2048 new_sync_write fs/read_write.c:497 [inline] vfs_write+0x76f/0x8d0 fs/read_write.c:590 ksys_write+0xbf/0x190 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __x64_sys_write+0x41/0x50 fs/read_write.c:652 x64_sys_call+0xe66/0x1990 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x4b/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7fc44a68bc1f Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 e9 cf f5 ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 3c d0 f5 ff 48 RSP: 002b:00007fc449126c90 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000004bc050 RCX: 00007fc44a68bc1f R ---truncated---
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 , < 7a67c4e47626e6daccda62888f8b096abb5d3940 (git)
Affected: 6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 , < 9f965684c57c3117cfd2f754dd3270383c529fba (git)
Affected: 6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 , < ddf516e50bf8a7bc9b3bd8a9831f9c7a8131a32a (git)
Affected: 6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 , < a6db0d3ea6536e7120871e5448b3032570152ec6 (git)
Affected: 6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 , < c5fd77ca13d657c6e99bf04f0917445e6a80231e (git)
Affected: 6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 , < 20ceae10623c3b29fdf7609690849475bcdebdb0 (git)
Affected: 6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 , < 5c0b485a8c6116516f33925b9ce5b6104a6eadfd (git)
Create a notification for this product.
Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 5.4.280 , ≤ 5.4.* (semver)
Unaffected: 5.10.222 , ≤ 5.10.* (semver)
Unaffected: 5.15.163 , ≤ 5.15.* (semver)
Unaffected: 6.1.100 , ≤ 6.1.* (semver)
Unaffected: 6.6.41 , ≤ 6.6.* (semver)
Unaffected: 6.9.10 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudp: Set SOCK_RCU_FREE earlier in udp_lib_get_port().\n\nsyzkaller triggered the warning [0] in udp_v4_early_demux().\n\nIn udp_v[46]_early_demux() and sk_lookup(), we do not touch the refcount\nof the looked-up sk and use sock_pfree() as skb-\u003edestructor, so we check\nSOCK_RCU_FREE to ensure that the sk is safe to access during the RCU grace\nperiod.\n\nCurrently, SOCK_RCU_FREE is flagged for a bound socket after being put\ninto the hash table.  Moreover, the SOCK_RCU_FREE check is done too early\nin udp_v[46]_early_demux() and sk_lookup(), so there could be a small race\nwindow:\n\n  CPU1                                 CPU2\n  ----                                 ----\n  udp_v4_early_demux()                 udp_lib_get_port()\n  |                                    |- hlist_add_head_rcu()\n  |- sk = __udp4_lib_demux_lookup()    |\n  |- DEBUG_NET_WARN_ON_ONCE(sk_is_refcounted(sk));\n                                       `- sock_set_flag(sk, SOCK_RCU_FREE)\n\nWe had the same bug in TCP and fixed it in commit 871019b22d1b (\"net:\nset SOCK_RCU_FREE before inserting socket into hashtable\").\n\nLet\u0027s apply the same fix for UDP.\n\n[0]:\nWARNING: CPU: 0 PID: 11198 at net/ipv4/udp.c:2599 udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599\nModules linked in:\nCPU: 0 PID: 11198 Comm: syz-executor.1 Not tainted 6.9.0-g93bda33046e7 #13\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\nRIP: 0010:udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599\nCode: c5 7a 15 fe bb 01 00 00 00 44 89 e9 31 ff d3 e3 81 e3 bf ef ff ff 89 de e8 2c 74 15 fe 85 db 0f 85 02 06 00 00 e8 9f 7a 15 fe \u003c0f\u003e 0b e8 98 7a 15 fe 49 8d 7e 60 e8 4f 39 2f fe 49 c7 46 60 20 52\nRSP: 0018:ffffc9000ce3fa58 EFLAGS: 00010293\nRAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8318c92c\nRDX: ffff888036ccde00 RSI: ffffffff8318c2f1 RDI: 0000000000000001\nRBP: ffff88805a2dd6e0 R08: 0000000000000001 R09: 0000000000000000\nR10: 0000000000000000 R11: 0001ffffffffffff R12: ffff88805a2dd680\nR13: 0000000000000007 R14: ffff88800923f900 R15: ffff88805456004e\nFS:  00007fc449127640(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007fc449126e38 CR3: 000000003de4b002 CR4: 0000000000770ef0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600\nPKRU: 55555554\nCall Trace:\n \u003cTASK\u003e\n ip_rcv_finish_core.constprop.0+0xbdd/0xd20 net/ipv4/ip_input.c:349\n ip_rcv_finish+0xda/0x150 net/ipv4/ip_input.c:447\n NF_HOOK include/linux/netfilter.h:314 [inline]\n NF_HOOK include/linux/netfilter.h:308 [inline]\n ip_rcv+0x16c/0x180 net/ipv4/ip_input.c:569\n __netif_receive_skb_one_core+0xb3/0xe0 net/core/dev.c:5624\n __netif_receive_skb+0x21/0xd0 net/core/dev.c:5738\n netif_receive_skb_internal net/core/dev.c:5824 [inline]\n netif_receive_skb+0x271/0x300 net/core/dev.c:5884\n tun_rx_batched drivers/net/tun.c:1549 [inline]\n tun_get_user+0x24db/0x2c50 drivers/net/tun.c:2002\n tun_chr_write_iter+0x107/0x1a0 drivers/net/tun.c:2048\n new_sync_write fs/read_write.c:497 [inline]\n vfs_write+0x76f/0x8d0 fs/read_write.c:590\n ksys_write+0xbf/0x190 fs/read_write.c:643\n __do_sys_write fs/read_write.c:655 [inline]\n __se_sys_write fs/read_write.c:652 [inline]\n __x64_sys_write+0x41/0x50 fs/read_write.c:652\n x64_sys_call+0xe66/0x1990 arch/x86/include/generated/asm/syscalls_64.h:2\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0x4b/0x110 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\nRIP: 0033:0x7fc44a68bc1f\nCode: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 e9 cf f5 ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 3c d0 f5 ff 48\nRSP: 002b:00007fc449126c90 EFLAGS: 00000293 ORIG_RAX: 0000000000000001\nRAX: ffffffffffffffda RBX: 00000000004bc050 RCX: 00007fc44a68bc1f\nR\n---truncated---"
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    "fkie_nvd": {
      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nudp: Set SOCK_RCU_FREE earlier in udp_lib_get_port().\\n\\nsyzkaller triggered the warning [0] in udp_v4_early_demux().\\n\\nIn udp_v[46]_early_demux() and sk_lookup(), we do not touch the refcount\\nof the looked-up sk and use sock_pfree() as skb-\u003edestructor, so we check\\nSOCK_RCU_FREE to ensure that the sk is safe to access during the RCU grace\\nperiod.\\n\\nCurrently, SOCK_RCU_FREE is flagged for a bound socket after being put\\ninto the hash table.  Moreover, the SOCK_RCU_FREE check is done too early\\nin udp_v[46]_early_demux() and sk_lookup(), so there could be a small race\\nwindow:\\n\\n  CPU1                                 CPU2\\n  ----                                 ----\\n  udp_v4_early_demux()                 udp_lib_get_port()\\n  |                                    |- hlist_add_head_rcu()\\n  |- sk = __udp4_lib_demux_lookup()    |\\n  |- DEBUG_NET_WARN_ON_ONCE(sk_is_refcounted(sk));\\n                                       `- sock_set_flag(sk, SOCK_RCU_FREE)\\n\\nWe had the same bug in TCP and fixed it in commit 871019b22d1b (\\\"net:\\nset SOCK_RCU_FREE before inserting socket into hashtable\\\").\\n\\nLet\u0027s apply the same fix for UDP.\\n\\n[0]:\\nWARNING: CPU: 0 PID: 11198 at net/ipv4/udp.c:2599 udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599\\nModules linked in:\\nCPU: 0 PID: 11198 Comm: syz-executor.1 Not tainted 6.9.0-g93bda33046e7 #13\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\\nRIP: 0010:udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599\\nCode: c5 7a 15 fe bb 01 00 00 00 44 89 e9 31 ff d3 e3 81 e3 bf ef ff ff 89 de e8 2c 74 15 fe 85 db 0f 85 02 06 00 00 e8 9f 7a 15 fe \u003c0f\u003e 0b e8 98 7a 15 fe 49 8d 7e 60 e8 4f 39 2f fe 49 c7 46 60 20 52\\nRSP: 0018:ffffc9000ce3fa58 EFLAGS: 00010293\\nRAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8318c92c\\nRDX: ffff888036ccde00 RSI: ffffffff8318c2f1 RDI: 0000000000000001\\nRBP: ffff88805a2dd6e0 R08: 0000000000000001 R09: 0000000000000000\\nR10: 0000000000000000 R11: 0001ffffffffffff R12: ffff88805a2dd680\\nR13: 0000000000000007 R14: ffff88800923f900 R15: ffff88805456004e\\nFS:  00007fc449127640(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 00007fc449126e38 CR3: 000000003de4b002 CR4: 0000000000770ef0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600\\nPKRU: 55555554\\nCall Trace:\\n \u003cTASK\u003e\\n ip_rcv_finish_core.constprop.0+0xbdd/0xd20 net/ipv4/ip_input.c:349\\n ip_rcv_finish+0xda/0x150 net/ipv4/ip_input.c:447\\n NF_HOOK include/linux/netfilter.h:314 [inline]\\n NF_HOOK include/linux/netfilter.h:308 [inline]\\n ip_rcv+0x16c/0x180 net/ipv4/ip_input.c:569\\n __netif_receive_skb_one_core+0xb3/0xe0 net/core/dev.c:5624\\n __netif_receive_skb+0x21/0xd0 net/core/dev.c:5738\\n netif_receive_skb_internal net/core/dev.c:5824 [inline]\\n netif_receive_skb+0x271/0x300 net/core/dev.c:5884\\n tun_rx_batched drivers/net/tun.c:1549 [inline]\\n tun_get_user+0x24db/0x2c50 drivers/net/tun.c:2002\\n tun_chr_write_iter+0x107/0x1a0 drivers/net/tun.c:2048\\n new_sync_write fs/read_write.c:497 [inline]\\n vfs_write+0x76f/0x8d0 fs/read_write.c:590\\n ksys_write+0xbf/0x190 fs/read_write.c:643\\n __do_sys_write fs/read_write.c:655 [inline]\\n __se_sys_write fs/read_write.c:652 [inline]\\n __x64_sys_write+0x41/0x50 fs/read_write.c:652\\n x64_sys_call+0xe66/0x1990 arch/x86/include/generated/asm/syscalls_64.h:2\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0x4b/0x110 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\\nRIP: 0033:0x7fc44a68bc1f\\nCode: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 e9 cf f5 ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 3c d0 f5 ff 48\\nRSP: 002b:00007fc449126c90 EFLAGS: 00000293 ORIG_RAX: 0000000000000001\\nRAX: ffffffffffffffda RBX: 00000000004bc050 RCX: 00007fc44a68bc1f\\nR\\n---truncated---\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: udp: configure SOCK_RCU_FREE anteriormente en udp_lib_get_port(). syzkaller activ\\u00f3 la advertencia [0] en udp_v4_early_demux(). En udp_v[46]_early_demux() y sk_lookup(), no tocamos el recuento del sk buscado y usamos sock_pfree() como skb-\u0026gt;destructor, por lo que verificamos SOCK_RCU_FREE para asegurarnos de que sea seguro acceder al sk durante el per\\u00edodo de gracia de la UCR. Actualmente, SOCK_RCU_FREE est\\u00e1 marcado para un socket vinculado despu\\u00e9s de colocarlo en la tabla hash. Adem\\u00e1s, la comprobaci\\u00f3n SOCK_RCU_FREE se realiza demasiado pronto en udp_v[46]_early_demux() y sk_lookup(), por lo que podr\\u00eda haber una peque\\u00f1a ventana de ejecuci\\u00f3n: CPU1 CPU2 ---- ---- udp_v4_early_demux() udp_lib_get_port() | |- hlist_add_head_rcu() |- sk = __udp4_lib_demux_lookup() | |- DEBUG_NET_WARN_ON_ONCE(sk_is_refcounted(sk)); `- sock_set_flag(sk, SOCK_RCU_FREE) Tuvimos el mismo error en TCP y lo solucionamos en la confirmaci\\u00f3n 871019b22d1b (\\\"net: configure SOCK_RCU_FREE antes de insertar el socket en la tabla hash\\\"). Apliquemos la misma soluci\\u00f3n para UDP. [0]: ADVERTENCIA: CPU: 0 PID: 11198 en net/ipv4/udp.c:2599 udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599 M\\u00f3dulos vinculados en: CPU: 0 PID: 11198 Comm: syz- ejecutor.1 No contaminado 6.9.0-g93bda33046e7 #13 Nombre del hardware: PC est\\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 01/04/2014 RIP: 0010 :udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599 C\\u00f3digo: c5 7a 15 fe bb 01 00 00 00 44 89 e9 31 ff d3 e3 81 e3 bf ef ff ff 89 de e8 2c 74 15 fe 85 db 0f 85 02 06 00 00 e8 9f 7a 15 fe \u0026lt;0f\u0026gt; 0b e8 98 7a 15 fe 49 8d 7e 60 e8 4f 39 2f fe 49 c7 46 60 20 52 RSP: 0018:ffffc9000ce3fa58 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8318c92c RDX: ffff888036ccde00 RSI: ffffffff8318c2f1 RDI: 0000000000000001 RBP: ffff88805a2dd6e0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000 R11: 0001ffffffffffff R12: ffff88805a2dd680 R13: 0000000000000007 R14: ffff88800923f900 R15: ffff88805456004e FS: 00007fc449127640(0 000) GS:ffff88807dc00000(0000) knlGS: 0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc449126e38 CR3: 000000003de4b002 CR4: 0000000000770ef0 DR0: 0000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 PKRU: 55555554 Llamar Seguimiento:  ip_rcv_finish_core .constprop.0+0xbdd/0xd20 net/ipv4/ip_input.c:349 ip_rcv_finish+0xda/0x150 net/ipv4/ip_input.c:447 NF_HOOK include/linux/netfilter.h:314 [en l\\u00ednea] NF_HOOK include/linux/netfilter .h:308 [en l\\u00ednea] ip_rcv+0x16c/0x180 net/ipv4/ip_input.c:569 __netif_receive_skb_one_core+0xb3/0xe0 net/core/dev.c:5624 __netif_receive_skb+0x21/0xd0 net/core/dev.c:5738 skb_internal net/core/dev.c:5824 [en l\\u00ednea] netif_receive_skb+0x271/0x300 net/core/dev.c:5884 tun_rx_batched drivers/net/tun.c:1549 [en l\\u00ednea] tun_get_user+0x24db/0x2c50 drivers/net/tun. c:2002 tun_chr_write_iter+0x107/0x1a0 drivers/net/tun.c:2048 new_sync_write fs/read_write.c:497 [en l\\u00ednea] vfs_write+0x76f/0x8d0 fs/read_write.c:590 ksys_write+0xbf/0x190 fs/read_write.c : 643 __do_sys_write fs/read_write.c: 655 [en l\\u00ednea] __se_sys_write fs/read_write.c: 652 [inline] __x64_sys_write+0x41/0x50 fs/read_write.c: 652 x64_sy m /syscalls_64.h:2 do_syscall_x64 arch/x86/entry/common.c:52 [en l\\u00ednea] do_syscall_64+0x4b/0x110 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0x7fc44a68bc C\\u00f3digo 1f: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 e9 cf f5 ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 3c d0 f5 ff 48 RSP: 002b:00007fc449126c90 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000004bc050 RCX: 00007fc44a68bc1f R ---truncado---\"}]",
      "id": "CVE-2024-41041",
      "lastModified": "2024-11-21T09:32:07.350",
      "published": "2024-07-29T15:15:12.563",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/20ceae10623c3b29fdf7609690849475bcdebdb0\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/5c0b485a8c6116516f33925b9ce5b6104a6eadfd\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/7a67c4e47626e6daccda62888f8b096abb5d3940\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/9f965684c57c3117cfd2f754dd3270383c529fba\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/a6db0d3ea6536e7120871e5448b3032570152ec6\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/c5fd77ca13d657c6e99bf04f0917445e6a80231e\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/ddf516e50bf8a7bc9b3bd8a9831f9c7a8131a32a\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/20ceae10623c3b29fdf7609690849475bcdebdb0\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/5c0b485a8c6116516f33925b9ce5b6104a6eadfd\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/7a67c4e47626e6daccda62888f8b096abb5d3940\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/9f965684c57c3117cfd2f754dd3270383c529fba\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/a6db0d3ea6536e7120871e5448b3032570152ec6\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/c5fd77ca13d657c6e99bf04f0917445e6a80231e\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/ddf516e50bf8a7bc9b3bd8a9831f9c7a8131a32a\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Awaiting Analysis"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-41041\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-07-29T15:15:12.563\",\"lastModified\":\"2025-11-03T22:17:27.070\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nudp: Set SOCK_RCU_FREE earlier in udp_lib_get_port().\\n\\nsyzkaller triggered the warning [0] in udp_v4_early_demux().\\n\\nIn udp_v[46]_early_demux() and sk_lookup(), we do not touch the refcount\\nof the looked-up sk and use sock_pfree() as skb-\u003edestructor, so we check\\nSOCK_RCU_FREE to ensure that the sk is safe to access during the RCU grace\\nperiod.\\n\\nCurrently, SOCK_RCU_FREE is flagged for a bound socket after being put\\ninto the hash table.  Moreover, the SOCK_RCU_FREE check is done too early\\nin udp_v[46]_early_demux() and sk_lookup(), so there could be a small race\\nwindow:\\n\\n  CPU1                                 CPU2\\n  ----                                 ----\\n  udp_v4_early_demux()                 udp_lib_get_port()\\n  |                                    |- hlist_add_head_rcu()\\n  |- sk = __udp4_lib_demux_lookup()    |\\n  |- DEBUG_NET_WARN_ON_ONCE(sk_is_refcounted(sk));\\n                                       `- sock_set_flag(sk, SOCK_RCU_FREE)\\n\\nWe had the same bug in TCP and fixed it in commit 871019b22d1b (\\\"net:\\nset SOCK_RCU_FREE before inserting socket into hashtable\\\").\\n\\nLet\u0027s apply the same fix for UDP.\\n\\n[0]:\\nWARNING: CPU: 0 PID: 11198 at net/ipv4/udp.c:2599 udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599\\nModules linked in:\\nCPU: 0 PID: 11198 Comm: syz-executor.1 Not tainted 6.9.0-g93bda33046e7 #13\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\\nRIP: 0010:udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599\\nCode: c5 7a 15 fe bb 01 00 00 00 44 89 e9 31 ff d3 e3 81 e3 bf ef ff ff 89 de e8 2c 74 15 fe 85 db 0f 85 02 06 00 00 e8 9f 7a 15 fe \u003c0f\u003e 0b e8 98 7a 15 fe 49 8d 7e 60 e8 4f 39 2f fe 49 c7 46 60 20 52\\nRSP: 0018:ffffc9000ce3fa58 EFLAGS: 00010293\\nRAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8318c92c\\nRDX: ffff888036ccde00 RSI: ffffffff8318c2f1 RDI: 0000000000000001\\nRBP: ffff88805a2dd6e0 R08: 0000000000000001 R09: 0000000000000000\\nR10: 0000000000000000 R11: 0001ffffffffffff R12: ffff88805a2dd680\\nR13: 0000000000000007 R14: ffff88800923f900 R15: ffff88805456004e\\nFS:  00007fc449127640(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 00007fc449126e38 CR3: 000000003de4b002 CR4: 0000000000770ef0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600\\nPKRU: 55555554\\nCall Trace:\\n \u003cTASK\u003e\\n ip_rcv_finish_core.constprop.0+0xbdd/0xd20 net/ipv4/ip_input.c:349\\n ip_rcv_finish+0xda/0x150 net/ipv4/ip_input.c:447\\n NF_HOOK include/linux/netfilter.h:314 [inline]\\n NF_HOOK include/linux/netfilter.h:308 [inline]\\n ip_rcv+0x16c/0x180 net/ipv4/ip_input.c:569\\n __netif_receive_skb_one_core+0xb3/0xe0 net/core/dev.c:5624\\n __netif_receive_skb+0x21/0xd0 net/core/dev.c:5738\\n netif_receive_skb_internal net/core/dev.c:5824 [inline]\\n netif_receive_skb+0x271/0x300 net/core/dev.c:5884\\n tun_rx_batched drivers/net/tun.c:1549 [inline]\\n tun_get_user+0x24db/0x2c50 drivers/net/tun.c:2002\\n tun_chr_write_iter+0x107/0x1a0 drivers/net/tun.c:2048\\n new_sync_write fs/read_write.c:497 [inline]\\n vfs_write+0x76f/0x8d0 fs/read_write.c:590\\n ksys_write+0xbf/0x190 fs/read_write.c:643\\n __do_sys_write fs/read_write.c:655 [inline]\\n __se_sys_write fs/read_write.c:652 [inline]\\n __x64_sys_write+0x41/0x50 fs/read_write.c:652\\n x64_sys_call+0xe66/0x1990 arch/x86/include/generated/asm/syscalls_64.h:2\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0x4b/0x110 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\\nRIP: 0033:0x7fc44a68bc1f\\nCode: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 e9 cf f5 ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 3c d0 f5 ff 48\\nRSP: 002b:00007fc449126c90 EFLAGS: 00000293 ORIG_RAX: 0000000000000001\\nRAX: ffffffffffffffda RBX: 00000000004bc050 RCX: 00007fc44a68bc1f\\nR\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: udp: configure SOCK_RCU_FREE anteriormente en udp_lib_get_port(). syzkaller activ\u00f3 la advertencia [0] en udp_v4_early_demux(). En udp_v[46]_early_demux() y sk_lookup(), no tocamos el recuento del sk buscado y usamos sock_pfree() como skb-\u0026gt;destructor, por lo que verificamos SOCK_RCU_FREE para asegurarnos de que sea seguro acceder al sk durante el per\u00edodo de gracia de la UCR. Actualmente, SOCK_RCU_FREE est\u00e1 marcado para un socket vinculado despu\u00e9s de colocarlo en la tabla hash. Adem\u00e1s, la comprobaci\u00f3n SOCK_RCU_FREE se realiza demasiado pronto en udp_v[46]_early_demux() y sk_lookup(), por lo que podr\u00eda haber una peque\u00f1a ventana de ejecuci\u00f3n: CPU1 CPU2 ---- ---- udp_v4_early_demux() udp_lib_get_port() | |- hlist_add_head_rcu() |- sk = __udp4_lib_demux_lookup() | |- DEBUG_NET_WARN_ON_ONCE(sk_is_refcounted(sk)); `- sock_set_flag(sk, SOCK_RCU_FREE) Tuvimos el mismo error en TCP y lo solucionamos en la confirmaci\u00f3n 871019b22d1b (\\\"net: configure SOCK_RCU_FREE antes de insertar el socket en la tabla hash\\\"). Apliquemos la misma soluci\u00f3n para UDP. [0]: ADVERTENCIA: CPU: 0 PID: 11198 en net/ipv4/udp.c:2599 udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599 M\u00f3dulos vinculados en: CPU: 0 PID: 11198 Comm: syz- ejecutor.1 No contaminado 6.9.0-g93bda33046e7 #13 Nombre del hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 01/04/2014 RIP: 0010 :udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599 C\u00f3digo: c5 7a 15 fe bb 01 00 00 00 44 89 e9 31 ff d3 e3 81 e3 bf ef ff ff 89 de e8 2c 74 15 fe 85 db 0f 85 02 06 00 00 e8 9f 7a 15 fe \u0026lt;0f\u0026gt; 0b e8 98 7a 15 fe 49 8d 7e 60 e8 4f 39 2f fe 49 c7 46 60 20 52 RSP: 0018:ffffc9000ce3fa58 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8318c92c RDX: ffff888036ccde00 RSI: ffffffff8318c2f1 RDI: 0000000000000001 RBP: ffff88805a2dd6e0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000 R11: 0001ffffffffffff R12: ffff88805a2dd680 R13: 0000000000000007 R14: ffff88800923f900 R15: ffff88805456004e FS: 00007fc449127640(0 000) GS:ffff88807dc00000(0000) knlGS: 0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc449126e38 CR3: 000000003de4b002 CR4: 0000000000770ef0 DR0: 0000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 PKRU: 55555554 Llamar Seguimiento:  ip_rcv_finish_core .constprop.0+0xbdd/0xd20 net/ipv4/ip_input.c:349 ip_rcv_finish+0xda/0x150 net/ipv4/ip_input.c:447 NF_HOOK include/linux/netfilter.h:314 [en l\u00ednea] NF_HOOK include/linux/netfilter .h:308 [en l\u00ednea] ip_rcv+0x16c/0x180 net/ipv4/ip_input.c:569 __netif_receive_skb_one_core+0xb3/0xe0 net/core/dev.c:5624 __netif_receive_skb+0x21/0xd0 net/core/dev.c:5738 skb_internal net/core/dev.c:5824 [en l\u00ednea] netif_receive_skb+0x271/0x300 net/core/dev.c:5884 tun_rx_batched drivers/net/tun.c:1549 [en l\u00ednea] tun_get_user+0x24db/0x2c50 drivers/net/tun. c:2002 tun_chr_write_iter+0x107/0x1a0 drivers/net/tun.c:2048 new_sync_write fs/read_write.c:497 [en l\u00ednea] vfs_write+0x76f/0x8d0 fs/read_write.c:590 ksys_write+0xbf/0x190 fs/read_write.c : 643 __do_sys_write fs/read_write.c: 655 [en l\u00ednea] __se_sys_write fs/read_write.c: 652 [inline] __x64_sys_write+0x41/0x50 fs/read_write.c: 652 x64_sy m /syscalls_64.h:2 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0x4b/0x110 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0x7fc44a68bc C\u00f3digo 1f: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 e9 cf f5 ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 3c d0 f5 ff 48 RSP: 002b:00007fc449126c90 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000004bc050 RCX: 00007fc44a68bc1f R ---truncado---\"}],\"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:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.280\",\"matchCriteriaId\":\"625DBFAB-C3D0-4309-A27F-12D6428FB38F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.222\",\"matchCriteriaId\":\"00696AC5-EE29-437F-97F9-C4D66608B327\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.163\",\"matchCriteriaId\":\"A97DEB09-4927-40F8-B5C6-F5BD5EAE0CFD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.100\",\"matchCriteriaId\":\"100CDF74-4DB5-4FC6-A54B-BDBDB0C27137\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.41\",\"matchCriteriaId\":\"96AC42B8-D66D-4AC5-B466-E9BA7910FA29\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.9.10\",\"matchCriteriaId\":\"AB2E8DEC-CFD5-4C2B-981D-E7E45A36C352\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"2EBB4392-5FA6-4DA9-9772-8F9C750109FA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"331C2F14-12C7-45D5-893D-8C52EE38EA10\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"3173713D-909A-4DD3-9DD4-1E171EB057EE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"79F18AFA-40F7-43F0-BA30-7BDB65F918B9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.10:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"BD973AA4-A789-49BD-8D57-B2846935D3C7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.10:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"8F3E9E0C-AC3E-4967-AF80-6483E8AB0078\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.10:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"11AF4CB9-F697-4EA4-8903-8F9417EFDA8E\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/20ceae10623c3b29fdf7609690849475bcdebdb0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5c0b485a8c6116516f33925b9ce5b6104a6eadfd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7a67c4e47626e6daccda62888f8b096abb5d3940\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9f965684c57c3117cfd2f754dd3270383c529fba\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a6db0d3ea6536e7120871e5448b3032570152ec6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c5fd77ca13d657c6e99bf04f0917445e6a80231e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ddf516e50bf8a7bc9b3bd8a9831f9c7a8131a32a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/20ceae10623c3b29fdf7609690849475bcdebdb0\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5c0b485a8c6116516f33925b9ce5b6104a6eadfd\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7a67c4e47626e6daccda62888f8b096abb5d3940\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9f965684c57c3117cfd2f754dd3270383c529fba\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a6db0d3ea6536e7120871e5448b3032570152ec6\",\"source\":\"af854a3a-2127-422b-91ae-3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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/7a67c4e47626e6daccda62888f8b096abb5d3940\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/9f965684c57c3117cfd2f754dd3270383c529fba\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/ddf516e50bf8a7bc9b3bd8a9831f9c7a8131a32a\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/a6db0d3ea6536e7120871e5448b3032570152ec6\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/c5fd77ca13d657c6e99bf04f0917445e6a80231e\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/20ceae10623c3b29fdf7609690849475bcdebdb0\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/5c0b485a8c6116516f33925b9ce5b6104a6eadfd\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T04:39:56.185Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-41041\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T16:23:13.757861Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:13.801Z\"}}], \"cna\": {\"title\": \"udp: Set SOCK_RCU_FREE earlier in udp_lib_get_port().\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6acc9b432e67\", \"lessThan\": \"7a67c4e47626\", \"versionType\": \"git\"}, {\"status\": \"affected\", 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\"lessThan\": \"4.20\", \"versionType\": \"custom\"}, {\"status\": \"unaffected\", \"version\": \"5.4.280\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.222\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.163\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.100\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.41\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9.10\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/ipv4/udp.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": 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looked-up sk and use sock_pfree() as skb-\u003edestructor, so we check\\nSOCK_RCU_FREE to ensure that the sk is safe to access during the RCU grace\\nperiod.\\n\\nCurrently, SOCK_RCU_FREE is flagged for a bound socket after being put\\ninto the hash table.  Moreover, the SOCK_RCU_FREE check is done too early\\nin udp_v[46]_early_demux() and sk_lookup(), so there could be a small race\\nwindow:\\n\\n  CPU1                                 CPU2\\n  ----                                 ----\\n  udp_v4_early_demux()                 udp_lib_get_port()\\n  |                                    |- hlist_add_head_rcu()\\n  |- sk = __udp4_lib_demux_lookup()    |\\n  |- DEBUG_NET_WARN_ON_ONCE(sk_is_refcounted(sk));\\n                                       `- sock_set_flag(sk, SOCK_RCU_FREE)\\n\\nWe had the same bug in TCP and fixed it in commit 871019b22d1b (\\\"net:\\nset SOCK_RCU_FREE before inserting socket into hashtable\\\").\\n\\nLet\u0027s apply the same fix for UDP.\\n\\n[0]:\\nWARNING: CPU: 0 PID: 11198 at net/ipv4/udp.c:2599 udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599\\nModules linked in:\\nCPU: 0 PID: 11198 Comm: syz-executor.1 Not tainted 6.9.0-g93bda33046e7 #13\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\\nRIP: 0010:udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599\\nCode: c5 7a 15 fe bb 01 00 00 00 44 89 e9 31 ff d3 e3 81 e3 bf ef ff ff 89 de e8 2c 74 15 fe 85 db 0f 85 02 06 00 00 e8 9f 7a 15 fe \u003c0f\u003e 0b e8 98 7a 15 fe 49 8d 7e 60 e8 4f 39 2f fe 49 c7 46 60 20 52\\nRSP: 0018:ffffc9000ce3fa58 EFLAGS: 00010293\\nRAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8318c92c\\nRDX: ffff888036ccde00 RSI: ffffffff8318c2f1 RDI: 0000000000000001\\nRBP: ffff88805a2dd6e0 R08: 0000000000000001 R09: 0000000000000000\\nR10: 0000000000000000 R11: 0001ffffffffffff R12: ffff88805a2dd680\\nR13: 0000000000000007 R14: ffff88800923f900 R15: ffff88805456004e\\nFS:  00007fc449127640(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 00007fc449126e38 CR3: 000000003de4b002 CR4: 0000000000770ef0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600\\nPKRU: 55555554\\nCall Trace:\\n \u003cTASK\u003e\\n ip_rcv_finish_core.constprop.0+0xbdd/0xd20 net/ipv4/ip_input.c:349\\n ip_rcv_finish+0xda/0x150 net/ipv4/ip_input.c:447\\n NF_HOOK include/linux/netfilter.h:314 [inline]\\n NF_HOOK include/linux/netfilter.h:308 [inline]\\n ip_rcv+0x16c/0x180 net/ipv4/ip_input.c:569\\n __netif_receive_skb_one_core+0xb3/0xe0 net/core/dev.c:5624\\n __netif_receive_skb+0x21/0xd0 net/core/dev.c:5738\\n netif_receive_skb_internal net/core/dev.c:5824 [inline]\\n netif_receive_skb+0x271/0x300 net/core/dev.c:5884\\n tun_rx_batched drivers/net/tun.c:1549 [inline]\\n tun_get_user+0x24db/0x2c50 drivers/net/tun.c:2002\\n tun_chr_write_iter+0x107/0x1a0 drivers/net/tun.c:2048\\n new_sync_write fs/read_write.c:497 [inline]\\n vfs_write+0x76f/0x8d0 fs/read_write.c:590\\n ksys_write+0xbf/0x190 fs/read_write.c:643\\n __do_sys_write fs/read_write.c:655 [inline]\\n __se_sys_write fs/read_write.c:652 [inline]\\n __x64_sys_write+0x41/0x50 fs/read_write.c:652\\n x64_sys_call+0xe66/0x1990 arch/x86/include/generated/asm/syscalls_64.h:2\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0x4b/0x110 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\\nRIP: 0033:0x7fc44a68bc1f\\nCode: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 e9 cf f5 ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 3c d0 f5 ff 48\\nRSP: 002b:00007fc449126c90 EFLAGS: 00000293 ORIG_RAX: 0000000000000001\\nRAX: ffffffffffffffda RBX: 00000000004bc050 RCX: 00007fc44a68bc1f\\nR\\n---truncated---\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-07-29T14:31:54.647Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-41041\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-09-11T17:32:58.050Z\", \"dateReserved\": \"2024-07-12T12:17:45.623Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-29T14:31:54.647Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Taxonomy of the tags.




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.