{"id":"CVE-2026-53238","state":"PUBLISHED","title":"netlabel: validate unlabeled address and mask attribute lengths","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetlabel: validate unlabeled address and mask attribute lengths\n\nnetlbl_unlabel_addrinfo_get() used the address attribute length to\ndetermine whether the attribute data could be read as an IPv4 or IPv6\naddress, but did not independently validate the corresponding mask\nattribute length.  A crafted Generic Netlink request could therefore\nprovide a valid IPv4/IPv6 address attribute with a shorter mask\nattribute, which would later be read as a full struct in_addr or\nstruct in6_addr.\n\nNLA_BINARY policy lengths are maximum lengths by default, so use\nNLA_POLICY_EXACT_LEN() for the unlabeled IPv4/IPv6 address and mask\nattributes.  This rejects short attributes during policy validation and\nalso exposes the exact length requirements through policy introspection.","publishedAt":"2026-06-25T08:39:34.492Z","updatedAt":"2026-06-25T08:39:34.492Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd","status":"affected","lessThan":"975a84fd741440853380d37465b6e226cf47254c","versionType":"git"},{"version":"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd","status":"affected","lessThan":"672f0f3b8f875ffe6525a37847eafa7648c4c0c6","versionType":"git"},{"version":"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd","status":"affected","lessThan":"95bda3eac0b1454c2cee98d58d9ba6dd8391e843","versionType":"git"},{"version":"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd","status":"affected","lessThan":"07a18f5c90dd3d586b73242f5a5bbf0a72f2fdc6","versionType":"git"},{"version":"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd","status":"affected","lessThan":"71c52da13c3737493b42d20d9f33de34e03b3156","versionType":"git"},{"version":"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd","status":"affected","lessThan":"0c4bb32ad7fdc2dc6a8050f41eb04d4bda56b6c8","versionType":"git"},{"version":"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd","status":"affected","lessThan":"ccfe292a966079c61ea68a2da303b2a336170993","versionType":"git"},{"version":"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd","status":"affected","lessThan":"9772589b57e44aedc240211c5c3f7a684a034d3a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netlabel/netlabel_unlabeled.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.25","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.25","versionType":"semver"},{"version":"5.10.259","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.210","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.176","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.143","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.94","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.36","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.13","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netlabel/netlabel_unlabeled.c"]}],"references":["https://git.kernel.org/stable/c/975a84fd741440853380d37465b6e226cf47254c","https://git.kernel.org/stable/c/672f0f3b8f875ffe6525a37847eafa7648c4c0c6","https://git.kernel.org/stable/c/95bda3eac0b1454c2cee98d58d9ba6dd8391e843","https://git.kernel.org/stable/c/07a18f5c90dd3d586b73242f5a5bbf0a72f2fdc6","https://git.kernel.org/stable/c/71c52da13c3737493b42d20d9f33de34e03b3156","https://git.kernel.org/stable/c/0c4bb32ad7fdc2dc6a8050f41eb04d4bda56b6c8","https://git.kernel.org/stable/c/ccfe292a966079c61ea68a2da303b2a336170993","https://git.kernel.org/stable/c/9772589b57e44aedc240211c5c3f7a684a034d3a"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53238.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53238","state":"PUBLISHED","datePublished":"2026-06-25T08:39:34.492Z","dateUpdated":"2026-06-25T08:39:34.492Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.393Z"},"containers":{"cna":{"title":"netlabel: validate unlabeled address and mask attribute lengths","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetlabel: validate unlabeled address and mask attribute lengths\n\nnetlbl_unlabel_addrinfo_get() used the address attribute length to\ndetermine whether the attribute data could be read as an IPv4 or IPv6\naddress, but did not independently validate the corresponding mask\nattribute length.  A crafted Generic Netlink request could therefore\nprovide a valid IPv4/IPv6 address attribute with a shorter mask\nattribute, which would later be read as a full struct in_addr or\nstruct in6_addr.\n\nNLA_BINARY policy lengths are maximum lengths by default, so use\nNLA_POLICY_EXACT_LEN() for the unlabeled IPv4/IPv6 address and mask\nattributes.  This rejects short attributes during policy validation and\nalso exposes the exact length requirements through policy introspection."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd","status":"affected","lessThan":"975a84fd741440853380d37465b6e226cf47254c","versionType":"git"},{"version":"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd","status":"affected","lessThan":"672f0f3b8f875ffe6525a37847eafa7648c4c0c6","versionType":"git"},{"version":"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd","status":"affected","lessThan":"95bda3eac0b1454c2cee98d58d9ba6dd8391e843","versionType":"git"},{"version":"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd","status":"affected","lessThan":"07a18f5c90dd3d586b73242f5a5bbf0a72f2fdc6","versionType":"git"},{"version":"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd","status":"affected","lessThan":"71c52da13c3737493b42d20d9f33de34e03b3156","versionType":"git"},{"version":"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd","status":"affected","lessThan":"0c4bb32ad7fdc2dc6a8050f41eb04d4bda56b6c8","versionType":"git"},{"version":"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd","status":"affected","lessThan":"ccfe292a966079c61ea68a2da303b2a336170993","versionType":"git"},{"version":"8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd","status":"affected","lessThan":"9772589b57e44aedc240211c5c3f7a684a034d3a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netlabel/netlabel_unlabeled.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.25","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.25","versionType":"semver"},{"version":"5.10.259","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.210","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.176","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.143","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.94","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.36","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.13","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netlabel/netlabel_unlabeled.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/975a84fd741440853380d37465b6e226cf47254c"},{"url":"https://git.kernel.org/stable/c/672f0f3b8f875ffe6525a37847eafa7648c4c0c6"},{"url":"https://git.kernel.org/stable/c/95bda3eac0b1454c2cee98d58d9ba6dd8391e843"},{"url":"https://git.kernel.org/stable/c/07a18f5c90dd3d586b73242f5a5bbf0a72f2fdc6"},{"url":"https://git.kernel.org/stable/c/71c52da13c3737493b42d20d9f33de34e03b3156"},{"url":"https://git.kernel.org/stable/c/0c4bb32ad7fdc2dc6a8050f41eb04d4bda56b6c8"},{"url":"https://git.kernel.org/stable/c/ccfe292a966079c61ea68a2da303b2a336170993"},{"url":"https://git.kernel.org/stable/c/9772589b57e44aedc240211c5c3f7a684a034d3a"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-25T08:39:34.492Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"5.10.259"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"5.15.210"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"6.1.176"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"6.6.143"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"6.12.94"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"6.18.36"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"7.0.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.25","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}