{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23204","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-01-13T15:37:45.986Z","datePublished":"2026-02-14T16:27:27.708Z","dateUpdated":"2026-05-11T22:02:20.203Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:02:20.203Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: cls_u32: use skb_header_pointer_careful()\n\nskb_header_pointer() does not fully validate negative @offset values.\n\nUse skb_header_pointer_careful() instead.\n\nGangMin Kim provided a report and a repro fooling u32_classify():\n\nBUG: KASAN: slab-out-of-bounds in u32_classify+0x1180/0x11b0\nnet/sched/cls_u32.c:221"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/cls_u32.c"],"versions":[{"version":"fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d","lessThan":"cfa745830e45ecb75c061aa34330ee0cac941cc7","status":"affected","versionType":"git"},{"version":"fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d","lessThan":"13336a6239b9d7c6e61483017bb8bdfe3ceb10a5","status":"affected","versionType":"git"},{"version":"fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d","lessThan":"e41a23e61259f5526af875c3b86b3d42a9bae0e5","status":"affected","versionType":"git"},{"version":"fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d","lessThan":"8a672f177ebe19c93d795fbe967846084fbc7943","status":"affected","versionType":"git"},{"version":"fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d","lessThan":"cabd1a976375780dabab888784e356f574bbaed8","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/sched/cls_u32.c"],"versions":[{"version":"2.6.35","status":"affected"},{"version":"0","lessThan":"2.6.35","status":"unaffected","versionType":"semver"},{"version":"6.1.167","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.124","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.70","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.10","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19","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":"2.6.35","versionEndExcluding":"6.1.167"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"6.6.124"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"6.12.70"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"6.18.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"6.19"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/cfa745830e45ecb75c061aa34330ee0cac941cc7"},{"url":"https://git.kernel.org/stable/c/13336a6239b9d7c6e61483017bb8bdfe3ceb10a5"},{"url":"https://git.kernel.org/stable/c/e41a23e61259f5526af875c3b86b3d42a9bae0e5"},{"url":"https://git.kernel.org/stable/c/8a672f177ebe19c93d795fbe967846084fbc7943"},{"url":"https://git.kernel.org/stable/c/cabd1a976375780dabab888784e356f574bbaed8"}],"title":"net/sched: cls_u32: use skb_header_pointer_careful()","x_generator":{"engine":"bippy-1.2.0"}}}}