{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-98379", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.345Z", "datePublished": "2026-10-09T07:34:19.425Z", "dateUpdated": "2026-10-19T09:18:30.044Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:18:30.044Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ip6t_rpfilter: reject routes without inet6_dev\n\nip6_route_lookup() can return an error-free route whose rt6i_idev is\nNULL. Lowering an external nexthop device's MTU below IPV6_MIN_MTU tears\ndown its inet6_dev while fib6_ifdown() leaves routes using nexthop objects\nin the FIB. An unprivileged user can construct this state with rtnetlink\nin a private user and network namespace, then trigger a NULL dereference\nthrough an IPv6 rpfilter lookup:\n\n Oops: general protection fault, probably for non-canonical address\n 0xdffffc0000000000\n KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\n RIP: rpfilter_mt (net/ipv6/netfilter/ip6t_rpfilter.c:75)\n Call Trace:\n ip6t_do_table (net/ipv6/netfilter/ip6_tables.c:316)\n nf_hook_slow (net/netfilter/core.c:619)\n ipv6_rcv (net/ipv6/ip6_input.c:351)\n __netif_receive_skb_one_core (net/core/dev.c:6216)\n process_backlog (net/core/dev.c:6680)\n __napi_poll (net/core/dev.c:7739)\n net_rx_action (net/core/dev.c:7959)\n handle_softirqs (kernel/softirq.c:622)\n do_softirq.part.0 (kernel/softirq.c:523)\n __local_bh_enable_ip (kernel/softirq.c:450)\n __dev_queue_xmit (net/core/dev.c:4913)\n packet_sendmsg (net/packet/af_packet.c:3139)\n __sys_sendto (net/socket.c:2252)\n __x64_sys_sendto (net/socket.c:2259)\n do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n Kernel panic - not syncing: Fatal exception in interrupt\n\nReject routes without an inet6_dev immediately after lookup. Such routes\nare not eligible for reverse-path filtering, and the check protects all\nlater rt6i_idev dereferences." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ipv6/netfilter/ip6t_rpfilter.c" ], "versions": [ { "version": "e26f9a480fb6c1b614660e824d69a74e2ce990f3", "lessThan": "f4de78756b0fddbd125b2b1b77c74f2eccc8e977", "status": "affected", "versionType": "git" }, { "version": "e26f9a480fb6c1b614660e824d69a74e2ce990f3", "lessThan": "1681ab6dd1271f2f36047490793b78b1848bbcc9", "status": "affected", "versionType": "git" }, { "version": "e26f9a480fb6c1b614660e824d69a74e2ce990f3", "lessThan": "65487e9e99431ffcf05024a817f51ee4e3bd9b47", "status": "affected", "versionType": "git" }, { "version": "e26f9a480fb6c1b614660e824d69a74e2ce990f3", "lessThan": "f49da48bd679cfee646d6a40dd02b1933de577d1", "status": "affected", "versionType": "git" }, { "version": "e26f9a480fb6c1b614660e824d69a74e2ce990f3", "lessThan": "290c96e5d9471d1ded9ab1e8ffbb04f6ee7b0f40", "status": "affected", "versionType": "git" }, { "version": "e26f9a480fb6c1b614660e824d69a74e2ce990f3", "lessThan": "eafe081ea77d25b5c8e601680671b4ecb4520e7d", "status": "affected", "versionType": "git" }, { "version": "e26f9a480fb6c1b614660e824d69a74e2ce990f3", "lessThan": "3a7384bc2e66217c9a01a392281334f4423740a0", "status": "affected", "versionType": "git" }, { "version": "e26f9a480fb6c1b614660e824d69a74e2ce990f3", "lessThan": "1b9b5323725e458906c7620a3bc10398b51ad954", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ipv6/netfilter/ip6t_rpfilter.c" ], "versions": [ { "version": "3.3", "status": "affected" }, { "version": "0", "lessThan": "3.3", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.271", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.55", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.9", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.3", "versionEndExcluding": "5.10.271" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.3", "versionEndExcluding": "5.15.222" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.3", "versionEndExcluding": "6.1.189" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.3", "versionEndExcluding": "6.6.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.3", "versionEndExcluding": "6.12.112" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.3", "versionEndExcluding": "6.18.55" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.3", "versionEndExcluding": "7.2.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.3", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/f4de78756b0fddbd125b2b1b77c74f2eccc8e977" }, { "url": "https://git.kernel.org/stable/c/1681ab6dd1271f2f36047490793b78b1848bbcc9" }, { "url": "https://git.kernel.org/stable/c/65487e9e99431ffcf05024a817f51ee4e3bd9b47" }, { "url": "https://git.kernel.org/stable/c/f49da48bd679cfee646d6a40dd02b1933de577d1" }, { "url": "https://git.kernel.org/stable/c/290c96e5d9471d1ded9ab1e8ffbb04f6ee7b0f40" }, { "url": "https://git.kernel.org/stable/c/eafe081ea77d25b5c8e601680671b4ecb4520e7d" }, { "url": "https://git.kernel.org/stable/c/3a7384bc2e66217c9a01a392281334f4423740a0" }, { "url": "https://git.kernel.org/stable/c/1b9b5323725e458906c7620a3bc10398b51ad954" } ], "title": "netfilter: ip6t_rpfilter: reject routes without inet6_dev", "x_generator": { "engine": "bippy-1.2.0" } } } }