cve-2024-26636
Vulnerability from cvelistv5
Published
2024-03-18 10:14
Modified
2024-12-19 08:43
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: llc: make llc_ui_sendmsg() more robust against bonding changes syzbot was able to trick llc_ui_sendmsg(), allocating an skb with no headroom, but subsequently trying to push 14 bytes of Ethernet header [1] Like some others, llc_ui_sendmsg() releases the socket lock before calling sock_alloc_send_skb(). Then it acquires it again, but does not redo all the sanity checks that were performed. This fix: - Uses LL_RESERVED_SPACE() to reserve space. - Check all conditions again after socket lock is held again. - Do not account Ethernet header for mtu limitation. [1] skbuff: skb_under_panic: text:ffff800088baa334 len:1514 put:14 head:ffff0000c9c37000 data:ffff0000c9c36ff2 tail:0x5dc end:0x6c0 dev:bond0 kernel BUG at net/core/skbuff.c:193 ! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 6875 Comm: syz-executor.0 Not tainted 6.7.0-rc8-syzkaller-00101-g0802e17d9aca-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : skb_panic net/core/skbuff.c:189 [inline] pc : skb_under_panic+0x13c/0x140 net/core/skbuff.c:203 lr : skb_panic net/core/skbuff.c:189 [inline] lr : skb_under_panic+0x13c/0x140 net/core/skbuff.c:203 sp : ffff800096f97000 x29: ffff800096f97010 x28: ffff80008cc8d668 x27: dfff800000000000 x26: ffff0000cb970c90 x25: 00000000000005dc x24: ffff0000c9c36ff2 x23: ffff0000c9c37000 x22: 00000000000005ea x21: 00000000000006c0 x20: 000000000000000e x19: ffff800088baa334 x18: 1fffe000368261ce x17: ffff80008e4ed000 x16: ffff80008a8310f8 x15: 0000000000000001 x14: 1ffff00012df2d58 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000001 x10: 0000000000ff0100 x9 : e28a51f1087e8400 x8 : e28a51f1087e8400 x7 : ffff80008028f8d0 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800082b78714 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000089 Call trace: skb_panic net/core/skbuff.c:189 [inline] skb_under_panic+0x13c/0x140 net/core/skbuff.c:203 skb_push+0xf0/0x108 net/core/skbuff.c:2451 eth_header+0x44/0x1f8 net/ethernet/eth.c:83 dev_hard_header include/linux/netdevice.h:3188 [inline] llc_mac_hdr_init+0x110/0x17c net/llc/llc_output.c:33 llc_sap_action_send_xid_c+0x170/0x344 net/llc/llc_s_ac.c:85 llc_exec_sap_trans_actions net/llc/llc_sap.c:153 [inline] llc_sap_next_state net/llc/llc_sap.c:182 [inline] llc_sap_state_process+0x1ec/0x774 net/llc/llc_sap.c:209 llc_build_and_send_xid_pkt+0x12c/0x1c0 net/llc/llc_sap.c:270 llc_ui_sendmsg+0x7bc/0xb1c net/llc/af_llc.c:997 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] sock_sendmsg+0x194/0x274 net/socket.c:767 splice_to_socket+0x7cc/0xd58 fs/splice.c:881 do_splice_from fs/splice.c:933 [inline] direct_splice_actor+0xe4/0x1c0 fs/splice.c:1142 splice_direct_to_actor+0x2a0/0x7e4 fs/splice.c:1088 do_splice_direct+0x20c/0x348 fs/splice.c:1194 do_sendfile+0x4bc/0xc70 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64 fs/read_write.c:1308 [inline] __arm64_sys_sendfile64+0x160/0x3b4 fs/read_write.c:1308 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Code: aa1803e6 aa1903e7 a90023f5 94792f6a (d4210000)
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/04f2a74b562f3a7498be0399309669f342793d8c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6d53b813ff8b177f86f149c2f744442681f720e4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/84e9d10419f6f4f3f3cd8f9aaf44a48719aa4b1b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b643d0defcbacd7fe548bc65c3e4e6f17dc5eb2d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c22044270da68881074fda81a7d34812726cb249
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c451c008f563d56d5e676c9dcafae565fcad84bb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cafd3ad3fe03ef4d6632747be9ee15dc0029db4b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dad555c816a50c6a6a8a86be1f9177673918c647
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/04f2a74b562f3a7498be0399309669f342793d8c
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6d53b813ff8b177f86f149c2f744442681f720e4
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/84e9d10419f6f4f3f3cd8f9aaf44a48719aa4b1b
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b643d0defcbacd7fe548bc65c3e4e6f17dc5eb2d
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c22044270da68881074fda81a7d34812726cb249
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c451c008f563d56d5e676c9dcafae565fcad84bb
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/cafd3ad3fe03ef4d6632747be9ee15dc0029db4b
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/dad555c816a50c6a6a8a86be1f9177673918c647
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
Impacted products
Vendor Product Version
Linux Linux Version: 2.6.12
Show details on NVD website

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nllc: make llc_ui_sendmsg() more robust against bonding changes\n\nsyzbot was able to trick llc_ui_sendmsg(), allocating an skb with no\nheadroom, but subsequently trying to push 14 bytes of Ethernet header [1]\n\nLike some others, llc_ui_sendmsg() releases the socket lock before\ncalling sock_alloc_send_skb().\nThen it acquires it again, but does not redo all the sanity checks\nthat were performed.\n\nThis fix:\n\n- Uses LL_RESERVED_SPACE() to reserve space.\n- Check all conditions again after socket lock is held again.\n- Do not account Ethernet header for mtu limitation.\n\n[1]\n\nskbuff: skb_under_panic: text:ffff800088baa334 len:1514 put:14 head:ffff0000c9c37000 data:ffff0000c9c36ff2 tail:0x5dc end:0x6c0 dev:bond0\n\n kernel BUG at net/core/skbuff.c:193 !\nInternal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP\nModules linked in:\nCPU: 0 PID: 6875 Comm: syz-executor.0 Not tainted 6.7.0-rc8-syzkaller-00101-g0802e17d9aca-dirty #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023\npstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : skb_panic net/core/skbuff.c:189 [inline]\n pc : skb_under_panic+0x13c/0x140 net/core/skbuff.c:203\n lr : skb_panic net/core/skbuff.c:189 [inline]\n lr : skb_under_panic+0x13c/0x140 net/core/skbuff.c:203\nsp : ffff800096f97000\nx29: ffff800096f97010 x28: ffff80008cc8d668 x27: dfff800000000000\nx26: ffff0000cb970c90 x25: 00000000000005dc x24: ffff0000c9c36ff2\nx23: ffff0000c9c37000 x22: 00000000000005ea x21: 00000000000006c0\nx20: 000000000000000e x19: ffff800088baa334 x18: 1fffe000368261ce\nx17: ffff80008e4ed000 x16: ffff80008a8310f8 x15: 0000000000000001\nx14: 1ffff00012df2d58 x13: 0000000000000000 x12: 0000000000000000\nx11: 0000000000000001 x10: 0000000000ff0100 x9 : e28a51f1087e8400\nx8 : e28a51f1087e8400 x7 : ffff80008028f8d0 x6 : 0000000000000000\nx5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800082b78714\nx2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000089\nCall trace:\n  skb_panic net/core/skbuff.c:189 [inline]\n  skb_under_panic+0x13c/0x140 net/core/skbuff.c:203\n  skb_push+0xf0/0x108 net/core/skbuff.c:2451\n  eth_header+0x44/0x1f8 net/ethernet/eth.c:83\n  dev_hard_header include/linux/netdevice.h:3188 [inline]\n  llc_mac_hdr_init+0x110/0x17c net/llc/llc_output.c:33\n  llc_sap_action_send_xid_c+0x170/0x344 net/llc/llc_s_ac.c:85\n  llc_exec_sap_trans_actions net/llc/llc_sap.c:153 [inline]\n  llc_sap_next_state net/llc/llc_sap.c:182 [inline]\n  llc_sap_state_process+0x1ec/0x774 net/llc/llc_sap.c:209\n  llc_build_and_send_xid_pkt+0x12c/0x1c0 net/llc/llc_sap.c:270\n  llc_ui_sendmsg+0x7bc/0xb1c net/llc/af_llc.c:997\n  sock_sendmsg_nosec net/socket.c:730 [inline]\n  __sock_sendmsg net/socket.c:745 [inline]\n  sock_sendmsg+0x194/0x274 net/socket.c:767\n  splice_to_socket+0x7cc/0xd58 fs/splice.c:881\n  do_splice_from fs/splice.c:933 [inline]\n  direct_splice_actor+0xe4/0x1c0 fs/splice.c:1142\n  splice_direct_to_actor+0x2a0/0x7e4 fs/splice.c:1088\n  do_splice_direct+0x20c/0x348 fs/splice.c:1194\n  do_sendfile+0x4bc/0xc70 fs/read_write.c:1254\n  __do_sys_sendfile64 fs/read_write.c:1322 [inline]\n  __se_sys_sendfile64 fs/read_write.c:1308 [inline]\n  __arm64_sys_sendfile64+0x160/0x3b4 fs/read_write.c:1308\n  __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]\n  invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51\n  el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136\n  do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155\n  el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678\n  el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696\n  el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595\nCode: aa1803e6 aa1903e7 a90023f5 94792f6a (d4210000)"
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    "datePublished": "2024-03-18T10:14:47.795Z",
    "dateReserved": "2024-02-19T14:20:24.136Z",
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  "vulnerability-lookup:meta": {
    "fkie_nvd": {
      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nllc: make llc_ui_sendmsg() more robust against bonding changes\\n\\nsyzbot was able to trick llc_ui_sendmsg(), allocating an skb with no\\nheadroom, but subsequently trying to push 14 bytes of Ethernet header [1]\\n\\nLike some others, llc_ui_sendmsg() releases the socket lock before\\ncalling sock_alloc_send_skb().\\nThen it acquires it again, but does not redo all the sanity checks\\nthat were performed.\\n\\nThis fix:\\n\\n- Uses LL_RESERVED_SPACE() to reserve space.\\n- Check all conditions again after socket lock is held again.\\n- Do not account Ethernet header for mtu limitation.\\n\\n[1]\\n\\nskbuff: skb_under_panic: text:ffff800088baa334 len:1514 put:14 head:ffff0000c9c37000 data:ffff0000c9c36ff2 tail:0x5dc end:0x6c0 dev:bond0\\n\\n kernel BUG at net/core/skbuff.c:193 !\\nInternal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP\\nModules linked in:\\nCPU: 0 PID: 6875 Comm: syz-executor.0 Not tainted 6.7.0-rc8-syzkaller-00101-g0802e17d9aca-dirty #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023\\npstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\\n pc : skb_panic net/core/skbuff.c:189 [inline]\\n pc : skb_under_panic+0x13c/0x140 net/core/skbuff.c:203\\n lr : skb_panic net/core/skbuff.c:189 [inline]\\n lr : skb_under_panic+0x13c/0x140 net/core/skbuff.c:203\\nsp : ffff800096f97000\\nx29: ffff800096f97010 x28: ffff80008cc8d668 x27: dfff800000000000\\nx26: ffff0000cb970c90 x25: 00000000000005dc x24: ffff0000c9c36ff2\\nx23: ffff0000c9c37000 x22: 00000000000005ea x21: 00000000000006c0\\nx20: 000000000000000e x19: ffff800088baa334 x18: 1fffe000368261ce\\nx17: ffff80008e4ed000 x16: ffff80008a8310f8 x15: 0000000000000001\\nx14: 1ffff00012df2d58 x13: 0000000000000000 x12: 0000000000000000\\nx11: 0000000000000001 x10: 0000000000ff0100 x9 : e28a51f1087e8400\\nx8 : e28a51f1087e8400 x7 : ffff80008028f8d0 x6 : 0000000000000000\\nx5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800082b78714\\nx2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000089\\nCall trace:\\n  skb_panic net/core/skbuff.c:189 [inline]\\n  skb_under_panic+0x13c/0x140 net/core/skbuff.c:203\\n  skb_push+0xf0/0x108 net/core/skbuff.c:2451\\n  eth_header+0x44/0x1f8 net/ethernet/eth.c:83\\n  dev_hard_header include/linux/netdevice.h:3188 [inline]\\n  llc_mac_hdr_init+0x110/0x17c net/llc/llc_output.c:33\\n  llc_sap_action_send_xid_c+0x170/0x344 net/llc/llc_s_ac.c:85\\n  llc_exec_sap_trans_actions net/llc/llc_sap.c:153 [inline]\\n  llc_sap_next_state net/llc/llc_sap.c:182 [inline]\\n  llc_sap_state_process+0x1ec/0x774 net/llc/llc_sap.c:209\\n  llc_build_and_send_xid_pkt+0x12c/0x1c0 net/llc/llc_sap.c:270\\n  llc_ui_sendmsg+0x7bc/0xb1c net/llc/af_llc.c:997\\n  sock_sendmsg_nosec net/socket.c:730 [inline]\\n  __sock_sendmsg net/socket.c:745 [inline]\\n  sock_sendmsg+0x194/0x274 net/socket.c:767\\n  splice_to_socket+0x7cc/0xd58 fs/splice.c:881\\n  do_splice_from fs/splice.c:933 [inline]\\n  direct_splice_actor+0xe4/0x1c0 fs/splice.c:1142\\n  splice_direct_to_actor+0x2a0/0x7e4 fs/splice.c:1088\\n  do_splice_direct+0x20c/0x348 fs/splice.c:1194\\n  do_sendfile+0x4bc/0xc70 fs/read_write.c:1254\\n  __do_sys_sendfile64 fs/read_write.c:1322 [inline]\\n  __se_sys_sendfile64 fs/read_write.c:1308 [inline]\\n  __arm64_sys_sendfile64+0x160/0x3b4 fs/read_write.c:1308\\n  __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]\\n  invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51\\n  el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136\\n  do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155\\n  el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678\\n  el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696\\n  el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595\\nCode: aa1803e6 aa1903e7 a90023f5 94792f6a (d4210000)\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se resolvi\\u00f3 la siguiente vulnerabilidad: llc: hacer que llc_ui_sendmsg() sea m\\u00e1s robusto contra cambios de vinculaci\\u00f3n syzbot pudo enga\\u00f1ar a llc_ui_sendmsg(), asignando un skb sin espacio libre, pero posteriormente intent\\u00f3 enviar 14 bytes de encabezado Ethernet [ 1] Como otros, llc_ui_sendmsg() libera el bloqueo del socket antes de llamar a sock_alloc_send_skb(). Luego lo adquiere nuevamente, pero no rehace todas las comprobaciones de cordura que se realizaron. Esta soluci\\u00f3n: - Utiliza LL_RESERVED_SPACE() para reservar espacio. - Verifique todas las condiciones nuevamente despu\\u00e9s de mantener nuevamente el bloqueo del casquillo. - No tenga en cuenta el encabezado Ethernet para la limitaci\\u00f3n de mtu. [1] skbuff: skb_under_panic: text:ffff800088baa334 len:1514 put:14 head:ffff0000c9c37000 data:ffff0000c9c36ff2 tail:0x5dc end:0x6c0 dev:bond0 ERROR del kernel en net/core/skbuff.c:193. Error interno: Ups - ERROR: 00000000f2000800 [#1] PREEMPT M\\u00f3dulos SMP vinculados en: CPU: 0 PID: 6875 Comm: syz-executor.0 No contaminado 6.7.0-rc8-syzkaller-00101-g0802e17d9aca-dirty #0 Nombre del hardware : Google Google Compute Engine/Google Compute Engine, BIOS Google 17/11/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc: skb_panic net/core/skbuff.c:189 [en l\\u00ednea] pc: skb_under_panic+0x13c/0x140 net/core/skbuff.c:203 lr: skb_panic net/core/skbuff.c:189 [en l\\u00ednea] lr: skb_under_panic+0x13c/0x140 net/core/skbuff.c:203 sp: ffff800096f97000 x29: ffff800096f97010 x28: ffff80008cc8d668 x27: dfff800000000000 x26: ffff0000cb970c90 x25: 00000000000005dc x24: ffff0000c 9c36ff2 x23: ffff0000c9c37000 x22: 00000000000005ea x21: 00000000000006c0 x20: 000000000000000e x19: ffff800088baa334 x18: 1fffe000368261ce x1 7: ffff80008e4ed000 x16: ffff80008a8310f8 x15: 0000000000000001 x14: 1ffff00012df2d58 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000001 x10: 0000000000ff0100 x9: e28a51f1087e8400 x8: e28a 51f1087e8400 x7: ffff80008028f8d0 x6: 0000000000000000 x5: 0000000000000001 x4: 0000000000000001 x3: ffff800082b78714 x2: 00000000000000 001 x1: 0000000100000000 x0: 0000000000000089 Rastreo de llamadas: skb_panic net/core /skbuff.c:189 [en l\\u00ednea] skb_under_panic+0x13c/0x140 net/core/skbuff.c:203 skb_push+0xf0/0x108 net/core/skbuff.c:2451 eth_header+0x44/0x1f8 net/ethernet/eth.c: 83 dev_hard_header include/linux/netdevice.h:3188 [en l\\u00ednea] llc_mac_hdr_init+0x110/0x17c net/llc/llc_output.c:33 llc_sap_action_send_xid_c+0x170/0x344 net/llc/llc_s_ac.c:85 llc_exec_sap_trans_ acciones net/llc/llc_sap.c :153 [en l\\u00ednea] llc_sap_next_state net/llc/llc_sap.c:182 [en l\\u00ednea] llc_sap_state_process+0x1ec/0x774 net/llc/llc_sap.c:209 llc_build_and_send_xid_pkt+0x12c/0x1c0 net/llc/llc_sap.c:270 llc_ ui_sendmsg+0x7bc/ 0xb1c net/llc/af_llc.c:997 sock_sendmsg_nosec net/socket.c:730 [en l\\u00ednea] __sock_sendmsg net/socket.c:745 [en l\\u00ednea] sock_sendmsg+0x194/0x274 net/socket.c:767 splice_to_socket+0x7cc/0xd58 fs /splice.c:881 do_splice_from fs/splice.c:933 [en l\\u00ednea] direct_splice_actor+0xe4/0x1c0 fs/splice.c:1142 splice_direct_to_actor+0x2a0/0x7e4 fs/splice.c:1088 do_splice_direct+0x20c/0x348 fs/splice. c:1194 do_sendfile+0x4bc/0xc70 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [en l\\u00ednea] __se_sys_sendfile64 fs/read_write.c:1308 [en l\\u00ednea] __arm64_sys_sendfile64+0x160/0x3b4 fs /read_write.c:1308 __invoke_syscall arch/arm64/kernel/syscall.c:37 [en l\\u00ednea] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/ 0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+ 0x190/0x194 arch/arm64/kernel/entry.S:595 C\\u00f3digo: aa1803e6 aa1903e7 a90023f5 94792f6a (d4210000)\"}]",
      "id": "CVE-2024-26636",
      "lastModified": "2024-11-21T09:02:44.270",
      "published": "2024-03-18T11:15:10.363",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/04f2a74b562f3a7498be0399309669f342793d8c\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/6d53b813ff8b177f86f149c2f744442681f720e4\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/84e9d10419f6f4f3f3cd8f9aaf44a48719aa4b1b\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/b643d0defcbacd7fe548bc65c3e4e6f17dc5eb2d\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/c22044270da68881074fda81a7d34812726cb249\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/c451c008f563d56d5e676c9dcafae565fcad84bb\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/cafd3ad3fe03ef4d6632747be9ee15dc0029db4b\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/dad555c816a50c6a6a8a86be1f9177673918c647\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/04f2a74b562f3a7498be0399309669f342793d8c\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/6d53b813ff8b177f86f149c2f744442681f720e4\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/84e9d10419f6f4f3f3cd8f9aaf44a48719aa4b1b\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/b643d0defcbacd7fe548bc65c3e4e6f17dc5eb2d\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/c22044270da68881074fda81a7d34812726cb249\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/c451c008f563d56d5e676c9dcafae565fcad84bb\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/cafd3ad3fe03ef4d6632747be9ee15dc0029db4b\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/dad555c816a50c6a6a8a86be1f9177673918c647\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Awaiting Analysis"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26636\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-18T11:15:10.363\",\"lastModified\":\"2024-11-21T09:02:44.270\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nllc: make llc_ui_sendmsg() more robust against bonding changes\\n\\nsyzbot was able to trick llc_ui_sendmsg(), allocating an skb with no\\nheadroom, but subsequently trying to push 14 bytes of Ethernet header [1]\\n\\nLike some others, llc_ui_sendmsg() releases the socket lock before\\ncalling sock_alloc_send_skb().\\nThen it acquires it again, but does not redo all the sanity checks\\nthat were performed.\\n\\nThis fix:\\n\\n- Uses LL_RESERVED_SPACE() to reserve space.\\n- Check all conditions again after socket lock is held again.\\n- Do not account Ethernet header for mtu limitation.\\n\\n[1]\\n\\nskbuff: skb_under_panic: text:ffff800088baa334 len:1514 put:14 head:ffff0000c9c37000 data:ffff0000c9c36ff2 tail:0x5dc end:0x6c0 dev:bond0\\n\\n kernel BUG at net/core/skbuff.c:193 !\\nInternal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP\\nModules linked in:\\nCPU: 0 PID: 6875 Comm: syz-executor.0 Not tainted 6.7.0-rc8-syzkaller-00101-g0802e17d9aca-dirty #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023\\npstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\\n pc : skb_panic net/core/skbuff.c:189 [inline]\\n pc : skb_under_panic+0x13c/0x140 net/core/skbuff.c:203\\n lr : skb_panic net/core/skbuff.c:189 [inline]\\n lr : skb_under_panic+0x13c/0x140 net/core/skbuff.c:203\\nsp : ffff800096f97000\\nx29: ffff800096f97010 x28: ffff80008cc8d668 x27: dfff800000000000\\nx26: ffff0000cb970c90 x25: 00000000000005dc x24: ffff0000c9c36ff2\\nx23: ffff0000c9c37000 x22: 00000000000005ea x21: 00000000000006c0\\nx20: 000000000000000e x19: ffff800088baa334 x18: 1fffe000368261ce\\nx17: ffff80008e4ed000 x16: ffff80008a8310f8 x15: 0000000000000001\\nx14: 1ffff00012df2d58 x13: 0000000000000000 x12: 0000000000000000\\nx11: 0000000000000001 x10: 0000000000ff0100 x9 : e28a51f1087e8400\\nx8 : e28a51f1087e8400 x7 : ffff80008028f8d0 x6 : 0000000000000000\\nx5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800082b78714\\nx2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000089\\nCall trace:\\n  skb_panic net/core/skbuff.c:189 [inline]\\n  skb_under_panic+0x13c/0x140 net/core/skbuff.c:203\\n  skb_push+0xf0/0x108 net/core/skbuff.c:2451\\n  eth_header+0x44/0x1f8 net/ethernet/eth.c:83\\n  dev_hard_header include/linux/netdevice.h:3188 [inline]\\n  llc_mac_hdr_init+0x110/0x17c net/llc/llc_output.c:33\\n  llc_sap_action_send_xid_c+0x170/0x344 net/llc/llc_s_ac.c:85\\n  llc_exec_sap_trans_actions net/llc/llc_sap.c:153 [inline]\\n  llc_sap_next_state net/llc/llc_sap.c:182 [inline]\\n  llc_sap_state_process+0x1ec/0x774 net/llc/llc_sap.c:209\\n  llc_build_and_send_xid_pkt+0x12c/0x1c0 net/llc/llc_sap.c:270\\n  llc_ui_sendmsg+0x7bc/0xb1c net/llc/af_llc.c:997\\n  sock_sendmsg_nosec net/socket.c:730 [inline]\\n  __sock_sendmsg net/socket.c:745 [inline]\\n  sock_sendmsg+0x194/0x274 net/socket.c:767\\n  splice_to_socket+0x7cc/0xd58 fs/splice.c:881\\n  do_splice_from fs/splice.c:933 [inline]\\n  direct_splice_actor+0xe4/0x1c0 fs/splice.c:1142\\n  splice_direct_to_actor+0x2a0/0x7e4 fs/splice.c:1088\\n  do_splice_direct+0x20c/0x348 fs/splice.c:1194\\n  do_sendfile+0x4bc/0xc70 fs/read_write.c:1254\\n  __do_sys_sendfile64 fs/read_write.c:1322 [inline]\\n  __se_sys_sendfile64 fs/read_write.c:1308 [inline]\\n  __arm64_sys_sendfile64+0x160/0x3b4 fs/read_write.c:1308\\n  __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]\\n  invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51\\n  el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136\\n  do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155\\n  el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678\\n  el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696\\n  el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595\\nCode: aa1803e6 aa1903e7 a90023f5 94792f6a (d4210000)\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: llc: hacer que llc_ui_sendmsg() sea m\u00e1s robusto contra cambios de vinculaci\u00f3n syzbot pudo enga\u00f1ar a llc_ui_sendmsg(), asignando un skb sin espacio libre, pero posteriormente intent\u00f3 enviar 14 bytes de encabezado Ethernet [ 1] Como otros, llc_ui_sendmsg() libera el bloqueo del socket antes de llamar a sock_alloc_send_skb(). Luego lo adquiere nuevamente, pero no rehace todas las comprobaciones de cordura que se realizaron. Esta soluci\u00f3n: - Utiliza LL_RESERVED_SPACE() para reservar espacio. - Verifique todas las condiciones nuevamente despu\u00e9s de mantener nuevamente el bloqueo del casquillo. - No tenga en cuenta el encabezado Ethernet para la limitaci\u00f3n de mtu. [1] skbuff: skb_under_panic: text:ffff800088baa334 len:1514 put:14 head:ffff0000c9c37000 data:ffff0000c9c36ff2 tail:0x5dc end:0x6c0 dev:bond0 ERROR del kernel en net/core/skbuff.c:193. Error interno: Ups - ERROR: 00000000f2000800 [#1] PREEMPT M\u00f3dulos SMP vinculados en: CPU: 0 PID: 6875 Comm: syz-executor.0 No contaminado 6.7.0-rc8-syzkaller-00101-g0802e17d9aca-dirty #0 Nombre del hardware : Google Google Compute Engine/Google Compute Engine, BIOS Google 17/11/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc: skb_panic net/core/skbuff.c:189 [en l\u00ednea] pc: skb_under_panic+0x13c/0x140 net/core/skbuff.c:203 lr: skb_panic net/core/skbuff.c:189 [en l\u00ednea] lr: skb_under_panic+0x13c/0x140 net/core/skbuff.c:203 sp: ffff800096f97000 x29: ffff800096f97010 x28: ffff80008cc8d668 x27: dfff800000000000 x26: ffff0000cb970c90 x25: 00000000000005dc x24: ffff0000c 9c36ff2 x23: ffff0000c9c37000 x22: 00000000000005ea x21: 00000000000006c0 x20: 000000000000000e x19: ffff800088baa334 x18: 1fffe000368261ce x1 7: ffff80008e4ed000 x16: ffff80008a8310f8 x15: 0000000000000001 x14: 1ffff00012df2d58 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000001 x10: 0000000000ff0100 x9: e28a51f1087e8400 x8: e28a 51f1087e8400 x7: ffff80008028f8d0 x6: 0000000000000000 x5: 0000000000000001 x4: 0000000000000001 x3: ffff800082b78714 x2: 00000000000000 001 x1: 0000000100000000 x0: 0000000000000089 Rastreo de llamadas: skb_panic net/core /skbuff.c:189 [en l\u00ednea] skb_under_panic+0x13c/0x140 net/core/skbuff.c:203 skb_push+0xf0/0x108 net/core/skbuff.c:2451 eth_header+0x44/0x1f8 net/ethernet/eth.c: 83 dev_hard_header include/linux/netdevice.h:3188 [en l\u00ednea] llc_mac_hdr_init+0x110/0x17c net/llc/llc_output.c:33 llc_sap_action_send_xid_c+0x170/0x344 net/llc/llc_s_ac.c:85 llc_exec_sap_trans_ acciones net/llc/llc_sap.c :153 [en l\u00ednea] llc_sap_next_state net/llc/llc_sap.c:182 [en l\u00ednea] llc_sap_state_process+0x1ec/0x774 net/llc/llc_sap.c:209 llc_build_and_send_xid_pkt+0x12c/0x1c0 net/llc/llc_sap.c:270 llc_ ui_sendmsg+0x7bc/ 0xb1c net/llc/af_llc.c:997 sock_sendmsg_nosec net/socket.c:730 [en l\u00ednea] __sock_sendmsg net/socket.c:745 [en l\u00ednea] sock_sendmsg+0x194/0x274 net/socket.c:767 splice_to_socket+0x7cc/0xd58 fs /splice.c:881 do_splice_from fs/splice.c:933 [en l\u00ednea] direct_splice_actor+0xe4/0x1c0 fs/splice.c:1142 splice_direct_to_actor+0x2a0/0x7e4 fs/splice.c:1088 do_splice_direct+0x20c/0x348 fs/splice. c:1194 do_sendfile+0x4bc/0xc70 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [en l\u00ednea] __se_sys_sendfile64 fs/read_write.c:1308 [en l\u00ednea] __arm64_sys_sendfile64+0x160/0x3b4 fs /read_write.c:1308 __invoke_syscall arch/arm64/kernel/syscall.c:37 [en l\u00ednea] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/ 0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+ 0x190/0x194 arch/arm64/kernel/entry.S:595 C\u00f3digo: aa1803e6 aa1903e7 a90023f5 94792f6a (d4210000)\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/04f2a74b562f3a7498be0399309669f342793d8c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6d53b813ff8b177f86f149c2f744442681f720e4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/84e9d10419f6f4f3f3cd8f9aaf44a48719aa4b1b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b643d0defcbacd7fe548bc65c3e4e6f17dc5eb2d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c22044270da68881074fda81a7d34812726cb249\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c451c008f563d56d5e676c9dcafae565fcad84bb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cafd3ad3fe03ef4d6632747be9ee15dc0029db4b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dad555c816a50c6a6a8a86be1f9177673918c647\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/04f2a74b562f3a7498be0399309669f342793d8c\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/6d53b813ff8b177f86f149c2f744442681f720e4\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/84e9d10419f6f4f3f3cd8f9aaf44a48719aa4b1b\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/b643d0defcbacd7fe548bc65c3e4e6f17dc5eb2d\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/c22044270da68881074fda81a7d34812726cb249\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/c451c008f563d56d5e676c9dcafae565fcad84bb\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/cafd3ad3fe03ef4d6632747be9ee15dc0029db4b\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/dad555c816a50c6a6a8a86be1f9177673918c647\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
  }
}


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