{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2024-26635", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-26635", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2024-03-18T10:14:47.213Z", "updatedAt": "2026-05-11T20:01:13.758Z", "importedAt": "2026-10-24T01:57:07.518Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "llc: Drop support for ETH_P_TR_802_2.", "summary": "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, &(0x7f0000000040)={@val={0x0, 0x11}, @val, @mpls={[], @llc={@snap={0xaa, 0x1, ')', \"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->protocol 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's 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", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "211ed865108e24697b44bee5daac502ee6bdd4a4", "status": "affected", "versionType": "git", "lessThan": "165ad1e22779685c3ed3dd349c6c4c632309cc62" }, { "version": "211ed865108e24697b44bee5daac502ee6bdd4a4", "status": "affected", "versionType": "git", "lessThan": "b8e8838f82f332ae80c643dbb1ca4418d0628097" }, { "version": "211ed865108e24697b44bee5daac502ee6bdd4a4", "status": "affected", "versionType": "git", "lessThan": "9ccdef19cf9497c2803b005369668feb91cacdfd" }, { "version": "211ed865108e24697b44bee5daac502ee6bdd4a4", "status": "affected", "versionType": "git", "lessThan": "c0fe2fe7a5a291dfcf6dc64301732c8d3dc6a828" }, { "version": "211ed865108e24697b44bee5daac502ee6bdd4a4", "status": "affected", "versionType": "git", "lessThan": "660c3053d992b68fee893a0e9ec9159228cffdc6" }, { "version": "211ed865108e24697b44bee5daac502ee6bdd4a4", "status": "affected", "versionType": "git", "lessThan": "f1f34a515fb1e25e85dee94f781e7869ae351fb8" }, { "version": "211ed865108e24697b44bee5daac502ee6bdd4a4", "status": "affected", "versionType": "git", "lessThan": "df57fc2f2abf548aa889a36ab0bdcc94a75399dc" }, { "version": "211ed865108e24697b44bee5daac502ee6bdd4a4", "status": "affected", "versionType": "git", "lessThan": "e3f9bed9bee261e3347131764e42aeedf1ffea61" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.5", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.5" }, { "version": "4.19.307", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.269", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.210", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.149", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.76", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.15", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.7.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.7.*" }, { "version": "6.8", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }