CVE-2024-26635 (GCVE-0-2024-26635)

Vulnerability from cvelistv5 – Published: 2024-03-18 10:14 – Updated: 2026-05-11 20:01
VLAI
Title
llc: Drop support for ETH_P_TR_802_2.
Summary
In the Linux kernel, the following vulnerability has been resolved: llc: Drop support for ETH_P_TR_802_2. syzbot reported an uninit-value bug below. [0] llc supports ETH_P_802_2 (0x0004) and used to support ETH_P_TR_802_2 (0x0011), and syzbot abused the latter to trigger the bug. write$tun(r0, &(0x7f0000000040)={@val={0x0, 0x11}, @val, @mpls={[], @llc={@snap={0xaa, 0x1, ')', "90e5dd"}}}}, 0x16) llc_conn_handler() initialises local variables {saddr,daddr}.mac based on skb in llc_pdu_decode_sa()/llc_pdu_decode_da() and passes them to __llc_lookup(). However, the initialisation is done only when skb->protocol is htons(ETH_P_802_2), otherwise, __llc_lookup_established() and __llc_lookup_listener() will read garbage. The missing initialisation existed prior to commit 211ed865108e ("net: delete all instances of special processing for token ring"). It removed the part to kick out the token ring stuff but forgot to close the door allowing ETH_P_TR_802_2 packets to sneak into llc_rcv(). Let's remove llc_tr_packet_type and complete the deprecation. [0]: BUG: KMSAN: uninit-value in __llc_lookup_established+0xe9d/0xf90 __llc_lookup_established+0xe9d/0xf90 __llc_lookup net/llc/llc_conn.c:611 [inline] llc_conn_handler+0x4bd/0x1360 net/llc/llc_conn.c:791 llc_rcv+0xfbb/0x14a0 net/llc/llc_input.c:206 __netif_receive_skb_one_core net/core/dev.c:5527 [inline] __netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5641 netif_receive_skb_internal net/core/dev.c:5727 [inline] netif_receive_skb+0x58/0x660 net/core/dev.c:5786 tun_rx_batched+0x3ee/0x980 drivers/net/tun.c:1555 tun_get_user+0x53af/0x66d0 drivers/net/tun.c:2002 tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048 call_write_iter include/linux/fs.h:2020 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x8ef/0x1490 fs/read_write.c:584 ksys_write+0x20f/0x4c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x93/0xd0 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b Local variable daddr created at: llc_conn_handler+0x53/0x1360 net/llc/llc_conn.c:783 llc_rcv+0xfbb/0x14a0 net/llc/llc_input.c:206 CPU: 1 PID: 5004 Comm: syz-executor994 Not tainted 6.6.0-syzkaller-14500-g1c41041124bd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 15:55 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 211ed865108e24697b44bee5daac502ee6bdd4a4 , < 165ad1e22779685c3ed3dd349c6c4c632309cc62 (git)
Affected: 211ed865108e24697b44bee5daac502ee6bdd4a4 , < b8e8838f82f332ae80c643dbb1ca4418d0628097 (git)
Affected: 211ed865108e24697b44bee5daac502ee6bdd4a4 , < 9ccdef19cf9497c2803b005369668feb91cacdfd (git)
Affected: 211ed865108e24697b44bee5daac502ee6bdd4a4 , < c0fe2fe7a5a291dfcf6dc64301732c8d3dc6a828 (git)
Affected: 211ed865108e24697b44bee5daac502ee6bdd4a4 , < 660c3053d992b68fee893a0e9ec9159228cffdc6 (git)
Affected: 211ed865108e24697b44bee5daac502ee6bdd4a4 , < f1f34a515fb1e25e85dee94f781e7869ae351fb8 (git)
Affected: 211ed865108e24697b44bee5daac502ee6bdd4a4 , < df57fc2f2abf548aa889a36ab0bdcc94a75399dc (git)
Affected: 211ed865108e24697b44bee5daac502ee6bdd4a4 , < e3f9bed9bee261e3347131764e42aeedf1ffea61 (git)
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Linux Linux Affected: 3.5
Unaffected: 0 , < 3.5 (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)
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[0]\\n\\nllc supports ETH_P_802_2 (0x0004) and used to support ETH_P_TR_802_2\\n(0x0011), and syzbot abused the latter to trigger the bug.\\n\\n  write$tun(r0, \u0026(0x7f0000000040)={@val={0x0, 0x11}, @val, @mpls={[], @llc={@snap={0xaa, 0x1, \u0027)\u0027, \\\"90e5dd\\\"}}}}, 0x16)\\n\\nllc_conn_handler() initialises local variables {saddr,daddr}.mac\\nbased on skb in llc_pdu_decode_sa()/llc_pdu_decode_da() and passes\\nthem to __llc_lookup().\\n\\nHowever, the initialisation is done only when skb-\u003eprotocol is\\nhtons(ETH_P_802_2), otherwise, __llc_lookup_established() and\\n__llc_lookup_listener() will read garbage.\\n\\nThe missing initialisation existed prior to commit 211ed865108e\\n(\\\"net: delete all instances of special processing for token ring\\\").\\n\\nIt removed the part to kick out the token ring stuff but forgot to\\nclose the door allowing ETH_P_TR_802_2 packets to sneak into llc_rcv().\\n\\nLet\u0027s remove llc_tr_packet_type and complete the deprecation.\\n\\n[0]:\\nBUG: KMSAN: uninit-value in __llc_lookup_established+0xe9d/0xf90\\n __llc_lookup_established+0xe9d/0xf90\\n __llc_lookup net/llc/llc_conn.c:611 [inline]\\n llc_conn_handler+0x4bd/0x1360 net/llc/llc_conn.c:791\\n llc_rcv+0xfbb/0x14a0 net/llc/llc_input.c:206\\n __netif_receive_skb_one_core net/core/dev.c:5527 [inline]\\n __netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5641\\n netif_receive_skb_internal net/core/dev.c:5727 [inline]\\n netif_receive_skb+0x58/0x660 net/core/dev.c:5786\\n tun_rx_batched+0x3ee/0x980 drivers/net/tun.c:1555\\n tun_get_user+0x53af/0x66d0 drivers/net/tun.c:2002\\n tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048\\n call_write_iter include/linux/fs.h:2020 [inline]\\n new_sync_write fs/read_write.c:491 [inline]\\n vfs_write+0x8ef/0x1490 fs/read_write.c:584\\n ksys_write+0x20f/0x4c0 fs/read_write.c:637\\n __do_sys_write fs/read_write.c:649 [inline]\\n __se_sys_write fs/read_write.c:646 [inline]\\n __x64_sys_write+0x93/0xd0 fs/read_write.c:646\\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\\n do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82\\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\\n\\nLocal variable daddr created at:\\n llc_conn_handler+0x53/0x1360 net/llc/llc_conn.c:783\\n llc_rcv+0xfbb/0x14a0 net/llc/llc_input.c:206\\n\\nCPU: 1 PID: 5004 Comm: syz-executor994 Not tainted 6.6.0-syzkaller-14500-g1c41041124bd #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: llc: Eliminaci\u00f3n del soporte para ETH_P_TR_802_2. syzbot inform\u00f3 un error de valor uninit a continuaci\u00f3n. [0] llc admite ETH_P_802_2 (0x0004) y sol\u00eda admitir ETH_P_TR_802_2 (0x0011), y syzbot abus\u00f3 de este \u00faltimo para desencadenar el error. escribir$tun(r0, \u0026amp;(0x7f0000000040)={@val={0x0, 0x11}, @val, @mpls={[], @llc={@snap={0xaa, 0x1, \u0027)\u0027, \\\"90e5dd\\\" }}}}, 0x16) llc_conn_handler() inicializa las variables locales {saddr,daddr}.mac basadas en skb en llc_pdu_decode_sa()/llc_pdu_decode_da() y las pasa a __llc_lookup(). Sin embargo, la inicializaci\u00f3n se realiza solo cuando skb-\u0026gt;protocol es htons(ETH_P_802_2); de lo contrario, __llc_lookup_establecido() y __llc_lookup_listener() leer\u00e1n basura. La inicializaci\u00f3n faltante exist\u00eda antes de el commit 211ed865108e (\\\"net: eliminar todas las instancias de procesamiento especial para Token Ring\\\"). Quit\u00f3 la parte para expulsar el token ring, pero se olvid\u00f3 de cerrar la puerta permitiendo que los paquetes ETH_P_TR_802_2 se colaran en llc_rcv(). Eliminemos llc_tr_packet_type y completemos la desaprobaci\u00f3n. [0]: ERROR: KMSAN: valor uninit en __llc_lookup_establecido+0xe9d/0xf90 __llc_lookup_establecido+0xe9d/0xf90 __llc_lookup net/llc/llc_conn.c:611 [en l\u00ednea] llc_conn_handler+0x4bd/0x1360 net/llc/llc_conn.c:79 1 llc_rcv +0xfbb/0x14a0 net/llc/llc_input.c:206 __netif_receive_skb_one_core net/core/dev.c:5527 [en l\u00ednea] __netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5641 netif_receive_skb_internal net/core/dev.c:5727 [en l\u00ednea] netif_receive_skb+0x58/0x660 net/core/dev.c:5786 tun_rx_batched+0x3ee/0x980 drivers/net/tun.c:1555 tun_get_user+0x53af/0x66d0 drivers/net/tun.c:2002 tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048 call_write_iter include/linux/fs.h:2020 [en l\u00ednea] new_sync_write fs/read_write.c:491 [en l\u00ednea] vfs_write+0x8ef/0x1490 fs/read_write.c:584 ksys_write+0x20f/0x4c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [en l\u00ednea] __se_sys_write fs/read_write.c:646 [en l\u00ednea] __x64_sys_write+0x93/0xd0 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common. c: 51 [en l\u00ednea] do_syscall_64+0x44/0x110 arch/x86/entry/comunes.c: 82 entry_syscall_64_after_hwframe+0x63/0x6b local variable daddr creado FBB /0x14a0 net/llc/llc_input.c:206 CPU: 1 PID: 5004 Comm: syz-executor994 No contaminado 6.6.0-syzkaller-14500-g1c41041124bd #0 Nombre de hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 10 /09/2023\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"include/net/llc_pdu.h\",\"net/llc/llc_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"211ed865108e24697b44bee5daac502ee6bdd4a4\",\"lessThan\":\"165ad1e22779685c3ed3dd349c6c4c632309cc62\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"211ed865108e24697b44bee5daac502ee6bdd4a4\",\"lessThan\":\"b8e8838f82f332ae80c643dbb1ca4418d0628097\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"211ed865108e24697b44bee5daac502ee6bdd4a4\",\"lessThan\":\"9ccdef19cf9497c2803b005369668feb91cacdfd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"211ed865108e24697b44bee5daac502ee6bdd4a4\",\"lessThan\":\"c0fe2fe7a5a291dfcf6dc64301732c8d3dc6a828\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"211ed865108e24697b44bee5daac502ee6bdd4a4\",\"lessThan\":\"660c3053d992b68fee893a0e9ec9159228cffdc6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"211ed865108e24697b44bee5daac502ee6bdd4a4\",\"lessThan\":\"f1f34a515fb1e25e85dee94f781e7869ae351fb8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"211ed865108e24697b44bee5daac502ee6bdd4a4\",\"lessThan\":\"df57fc2f2abf548aa889a36ab0bdcc94a75399dc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"211ed865108e24697b44bee5daac502ee6bdd4a4\",\"lessThan\":\"e3f9bed9bee261e3347131764e42aeedf1ffea61\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"include/net/llc_pdu.h\",\"net/llc/llc_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.5\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.5\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.307\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.269\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.210\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.149\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.76\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.15\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.7.3\",\"lessThanOrEqual\":\"6.7.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.8\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"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}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-09-10T15:55:09.935989Z\",\"id\":\"CVE-2024-26635\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA 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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2025-11-21T14:46:10+00:00",
      "cve": "CVE-2024-26635",
      "id": "CVE-2024-26635",
      "initial_release_date": "2024-03-18T00:00:00+00:00",
      "product_status:known_affected": "42",
      "product_status:known_not_affected": "156",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: llc: Drop support for ETH_P_TR_802_2.",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-26635.json",
      "version": "3"
    },
    "vulnrichment": {
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{\"title\": \"llc: Drop support for ETH_P_TR_802_2.\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"211ed865108e24697b44bee5daac502ee6bdd4a4\", \"lessThan\": \"165ad1e22779685c3ed3dd349c6c4c632309cc62\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"211ed865108e24697b44bee5daac502ee6bdd4a4\", \"lessThan\": \"b8e8838f82f332ae80c643dbb1ca4418d0628097\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"211ed865108e24697b44bee5daac502ee6bdd4a4\", \"lessThan\": \"9ccdef19cf9497c2803b005369668feb91cacdfd\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"211ed865108e24697b44bee5daac502ee6bdd4a4\", \"lessThan\": \"c0fe2fe7a5a291dfcf6dc64301732c8d3dc6a828\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"211ed865108e24697b44bee5daac502ee6bdd4a4\", \"lessThan\": \"660c3053d992b68fee893a0e9ec9159228cffdc6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"211ed865108e24697b44bee5daac502ee6bdd4a4\", \"lessThan\": \"f1f34a515fb1e25e85dee94f781e7869ae351fb8\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"211ed865108e24697b44bee5daac502ee6bdd4a4\", \"lessThan\": \"df57fc2f2abf548aa889a36ab0bdcc94a75399dc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"211ed865108e24697b44bee5daac502ee6bdd4a4\", \"lessThan\": \"e3f9bed9bee261e3347131764e42aeedf1ffea61\", \"versionType\": \"git\"}], \"programFiles\": [\"include/net/llc_pdu.h\", \"net/llc/llc_core.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.5\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.5\", \"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\": [\"include/net/llc_pdu.h\", \"net/llc/llc_core.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/165ad1e22779685c3ed3dd349c6c4c632309cc62\"}, {\"url\": \"https://git.kernel.org/stable/c/b8e8838f82f332ae80c643dbb1ca4418d0628097\"}, {\"url\": \"https://git.kernel.org/stable/c/9ccdef19cf9497c2803b005369668feb91cacdfd\"}, {\"url\": \"https://git.kernel.org/stable/c/c0fe2fe7a5a291dfcf6dc64301732c8d3dc6a828\"}, {\"url\": \"https://git.kernel.org/stable/c/660c3053d992b68fee893a0e9ec9159228cffdc6\"}, {\"url\": \"https://git.kernel.org/stable/c/f1f34a515fb1e25e85dee94f781e7869ae351fb8\"}, {\"url\": \"https://git.kernel.org/stable/c/df57fc2f2abf548aa889a36ab0bdcc94a75399dc\"}, {\"url\": \"https://git.kernel.org/stable/c/e3f9bed9bee261e3347131764e42aeedf1ffea61\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nllc: Drop support for ETH_P_TR_802_2.\\n\\nsyzbot reported an uninit-value bug below. [0]\\n\\nllc supports ETH_P_802_2 (0x0004) and used to support ETH_P_TR_802_2\\n(0x0011), and syzbot abused the latter to trigger the bug.\\n\\n  write$tun(r0, \u0026(0x7f0000000040)={@val={0x0, 0x11}, @val, @mpls={[], @llc={@snap={0xaa, 0x1, \u0027)\u0027, \\\"90e5dd\\\"}}}}, 0x16)\\n\\nllc_conn_handler() initialises local variables {saddr,daddr}.mac\\nbased on skb in llc_pdu_decode_sa()/llc_pdu_decode_da() and passes\\nthem to __llc_lookup().\\n\\nHowever, the initialisation is done only when skb-\u003eprotocol is\\nhtons(ETH_P_802_2), otherwise, __llc_lookup_established() and\\n__llc_lookup_listener() will read garbage.\\n\\nThe missing initialisation existed prior to commit 211ed865108e\\n(\\\"net: delete all instances of special processing for token ring\\\").\\n\\nIt removed the part to kick out the token ring stuff but forgot to\\nclose the door allowing ETH_P_TR_802_2 packets to sneak into llc_rcv().\\n\\nLet\u0027s remove llc_tr_packet_type and complete the deprecation.\\n\\n[0]:\\nBUG: KMSAN: uninit-value in __llc_lookup_established+0xe9d/0xf90\\n __llc_lookup_established+0xe9d/0xf90\\n __llc_lookup net/llc/llc_conn.c:611 [inline]\\n llc_conn_handler+0x4bd/0x1360 net/llc/llc_conn.c:791\\n llc_rcv+0xfbb/0x14a0 net/llc/llc_input.c:206\\n __netif_receive_skb_one_core net/core/dev.c:5527 [inline]\\n __netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5641\\n netif_receive_skb_internal net/core/dev.c:5727 [inline]\\n netif_receive_skb+0x58/0x660 net/core/dev.c:5786\\n tun_rx_batched+0x3ee/0x980 drivers/net/tun.c:1555\\n tun_get_user+0x53af/0x66d0 drivers/net/tun.c:2002\\n tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048\\n call_write_iter include/linux/fs.h:2020 [inline]\\n new_sync_write fs/read_write.c:491 [inline]\\n vfs_write+0x8ef/0x1490 fs/read_write.c:584\\n ksys_write+0x20f/0x4c0 fs/read_write.c:637\\n __do_sys_write fs/read_write.c:649 [inline]\\n __se_sys_write fs/read_write.c:646 [inline]\\n __x64_sys_write+0x93/0xd0 fs/read_write.c:646\\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\\n do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82\\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\\n\\nLocal variable daddr created at:\\n llc_conn_handler+0x53/0x1360 net/llc/llc_conn.c:783\\n llc_rcv+0xfbb/0x14a0 net/llc/llc_input.c:206\\n\\nCPU: 1 PID: 5004 Comm: syz-executor994 Not tainted 6.6.0-syzkaller-14500-g1c41041124bd #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.307\", \"versionStartIncluding\": \"3.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.269\", \"versionStartIncluding\": \"3.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.210\", \"versionStartIncluding\": \"3.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.149\", \"versionStartIncluding\": \"3.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.76\", \"versionStartIncluding\": \"3.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.15\", \"versionStartIncluding\": \"3.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.3\", \"versionStartIncluding\": \"3.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"3.5\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T20:01:13.758Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26635\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T20:01:13.758Z\", \"dateReserved\": \"2024-02-19T14:20:24.136Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-18T10:14:47.213Z\", \"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.