{"id":"CVE-2026-43099","revision":null,"records":[{"revision":"f7b52e3dcbc94b31a98156fedad45bb0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-43099","aliases":[],"title":"ipv4: icmp: fix null-ptr-deref in icmp_build_probe()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: icmp: fix null-ptr-deref in icmp_build_probe()\n\nipv6_stub->ipv6_dev_find() may return ERR_PTR(-EAFNOSUPPORT) when the\nIPv6 stack is not active (CONFIG_IPV6=m and not loaded), and passing\nthis error pointer to dev_hold() will cause a kernel crash with\nnull-ptr-deref.\n\nInstead, silently discard the request. RFC 8335 does not appear to\ndefine a specific response for the case where an IPv6 interface\nidentifier is syntactically valid but the implementation cannot perform\nthe lookup at runtime, and silently dropping the request may safer than\nmisreporting \"No Such Interface\".","state":0,"publishedAt":"2026-05-06T07:40:29.567+00:00","modifiedAt":"2026-10-15T01:19:07.639+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/ipv4/icmp.c\"\n ],\n \"versions\": [\n {\n \"version\": \"d329ea5bd8845f0b196bf41b18b6173340d6e0e4\",\n \"lessThan\": \"0f21bc261e60f0c696c58841c4873ff77ed83673\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d329ea5bd8845f0b196bf41b18b6173340d6e0e4\",\n \"lessThan\": \"dc5db4db19766a61ad65d81d1f55b1c1e51ba78d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d329ea5bd8845f0b196bf41b18b6173340d6e0e4\",\n \"lessThan\": \"47a8bf52156ac7e7a581eca31c1f964ba4258d4d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d329ea5bd8845f0b196bf41b18b6173340d6e0e4\",\n \"lessThan\": \"6be325206850a0891896d38bcf83a09d8b54ec48\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d329ea5bd8845f0b196bf41b18b6173340d6e0e4\",\n \"lessThan\": \"f91b3ed9e7fa82a70511b5f6901c88379acf2964\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d329ea5bd8845f0b196bf41b18b6173340d6e0e4\",\n \"lessThan\": \"5b9911582d441f72fe6ccb15ffe3303bbc07f6f5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d329ea5bd8845f0b196bf41b18b6173340d6e0e4\",\n \"lessThan\": \"fde29fd9349327acc50d19a0b5f3d5a6c964dfd8\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/ipv4/icmp.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.13\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.13\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.209\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.175\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.136\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.83\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.24\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.19.14\",\n \"lessThanOrEqual\": \"6.19.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/0f21bc261e60f0c696c58841c4873ff77ed83673","https://git.kernel.org/stable/c/dc5db4db19766a61ad65d81d1f55b1c1e51ba78d","https://git.kernel.org/stable/c/47a8bf52156ac7e7a581eca31c1f964ba4258d4d","https://git.kernel.org/stable/c/6be325206850a0891896d38bcf83a09d8b54ec48","https://git.kernel.org/stable/c/f91b3ed9e7fa82a70511b5f6901c88379acf2964","https://git.kernel.org/stable/c/5b9911582d441f72fe6ccb15ffe3303bbc07f6f5","https://git.kernel.org/stable/c/fde29fd9349327acc50d19a0b5f3d5a6c964dfd8"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43099","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-43099","identifiers":["CVE-2026-43099"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-11-09T18:04:49.9033842+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T18:04:49.9033842+00:00","lastSuccessAt":"2026-11-09T18:04:51.425345+00:00","error":null,"lastVerifiedAt":"2026-11-09T18:04:51.425345+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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