CVE-2024-26636 (GCVE-0-2024-26636)

Vulnerability from cvelistv5 – Published: 2024-03-18 10:14 – Updated: 2026-05-11 20:01
VLAI
Title
llc: make llc_ui_sendmsg() more robust against bonding changes
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)
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 84e9d10419f6f4f3f3cd8f9aaf44a48719aa4b1b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b643d0defcbacd7fe548bc65c3e4e6f17dc5eb2d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 04f2a74b562f3a7498be0399309669f342793d8c (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c22044270da68881074fda81a7d34812726cb249 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6d53b813ff8b177f86f149c2f744442681f720e4 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cafd3ad3fe03ef4d6632747be9ee15dc0029db4b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c451c008f563d56d5e676c9dcafae565fcad84bb (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < dad555c816a50c6a6a8a86be1f9177673918c647 (git)
Create a notification for this product.
Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 4.19.307 , ≤ 4.19.* (semver)
Unaffected: 5.4.269 , ≤ 5.4.* (semver)
Unaffected: 5.10.210 , ≤ 5.10.* (semver)
Unaffected: 5.15.149 , ≤ 5.15.* (semver)
Unaffected: 6.1.76 , ≤ 6.1.* (semver)
Unaffected: 6.6.15 , ≤ 6.6.* (semver)
Unaffected: 6.7.3 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (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\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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    "cveId": "CVE-2024-26636",
    "datePublished": "2024-03-18T10:14:47.795Z",
    "dateReserved": "2024-02-19T14:20:24.136Z",
    "dateUpdated": "2026-05-11T20:01:15.208Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2024-26636",
      "date": "2026-06-22",
      "epss": "0.0024",
      "percentile": "0.1483"
    },
    "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\":\"2025-03-10T17:04:27.757\",\"vulnStatus\":\"Analyzed\",\"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\":{\"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\":\"2.6.12\",\"versionEndExcluding\":\"4.19.307\",\"matchCriteriaId\":\"9F7D87E5-6751-4F81-9988-9AD4C1201206\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.269\",\"matchCriteriaId\":\"319545F3-D56C-4751-BEBF-0505478BBAE8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.210\",\"matchCriteriaId\":\"F5CB4CA6-A9A0-4AFD-9102-8CF94D708170\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.149\",\"matchCriteriaId\":\"0D0465BB-4053-4E15-9137-6696EBAE90FD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.76\",\"matchCriteriaId\":\"32F0FEB3-5FE1-4400-A56D-886F09BE872E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.15\",\"matchCriteriaId\":\"87C718CB-AE3D-4B07-B4D9-BFF64183C468\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.7.3\",\"matchCriteriaId\":\"58FD5308-148A-40D3-B36A-0CA6B434A8BF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B9F4EA73-0894-400F-A490-3A397AB7A517\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/04f2a74b562f3a7498be0399309669f342793d8c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Mailing 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    "vulnrichment": {
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{\"title\": \"llc: make llc_ui_sendmsg() more robust against bonding changes\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"84e9d10419f6f4f3f3cd8f9aaf44a48719aa4b1b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"b643d0defcbacd7fe548bc65c3e4e6f17dc5eb2d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"04f2a74b562f3a7498be0399309669f342793d8c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"c22044270da68881074fda81a7d34812726cb249\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"6d53b813ff8b177f86f149c2f744442681f720e4\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"cafd3ad3fe03ef4d6632747be9ee15dc0029db4b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"c451c008f563d56d5e676c9dcafae565fcad84bb\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"dad555c816a50c6a6a8a86be1f9177673918c647\", \"versionType\": \"git\"}], \"programFiles\": [\"net/llc/af_llc.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.12\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.12\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.307\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.269\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.210\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.149\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.76\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.15\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.7.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.7.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/llc/af_llc.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/84e9d10419f6f4f3f3cd8f9aaf44a48719aa4b1b\"}, {\"url\": \"https://git.kernel.org/stable/c/b643d0defcbacd7fe548bc65c3e4e6f17dc5eb2d\"}, {\"url\": \"https://git.kernel.org/stable/c/04f2a74b562f3a7498be0399309669f342793d8c\"}, {\"url\": \"https://git.kernel.org/stable/c/c22044270da68881074fda81a7d34812726cb249\"}, {\"url\": \"https://git.kernel.org/stable/c/6d53b813ff8b177f86f149c2f744442681f720e4\"}, {\"url\": \"https://git.kernel.org/stable/c/cafd3ad3fe03ef4d6632747be9ee15dc0029db4b\"}, {\"url\": \"https://git.kernel.org/stable/c/c451c008f563d56d5e676c9dcafae565fcad84bb\"}, {\"url\": \"https://git.kernel.org/stable/c/dad555c816a50c6a6a8a86be1f9177673918c647\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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)\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.307\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.269\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.210\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.149\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.76\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.15\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.3\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"2.6.12\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T20:01:15.208Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26636\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T20:01:15.208Z\", \"dateReserved\": \"2024-02-19T14:20:24.136Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-18T10:14:47.795Z\", \"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.