{"id":"CVE-2026-43099","revision":"f7b52e3dcbc94b31a98156fedad45bb0","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":[]}