{"id":"CVE-2026-23204","revision":"79968a25413c4a64b06ac7ba31287d7b","records":[{"revision":"79968a25413c4a64b06ac7ba31287d7b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-23204","aliases":[],"title":"net/sched: cls_u32: use skb_header_pointer_careful()","description":"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","state":0,"publishedAt":"2026-02-14T16:27:27.708+00:00","modifiedAt":"2026-10-19T18:35:38.542+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/sched/cls_u32.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d\",\n                            \"lessThan\": \"66e4b63d61c15de6ca5332d9ca6db59a404d7136\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d\",\n                            \"lessThan\": \"29681ed51e737be14d18ecd1c304c57002e4b72c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d\",\n                            \"lessThan\": \"cfa745830e45ecb75c061aa34330ee0cac941cc7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d\",\n                            \"lessThan\": \"13336a6239b9d7c6e61483017bb8bdfe3ceb10a5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d\",\n                            \"lessThan\": \"e41a23e61259f5526af875c3b86b3d42a9bae0e5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d\",\n                            \"lessThan\": \"8a672f177ebe19c93d795fbe967846084fbc7943\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d\",\n                            \"lessThan\": \"cabd1a976375780dabab888784e356f574bbaed8\",\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/sched/cls_u32.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.35\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.35\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.260\",\n                            \"lessThanOrEqual\": \"5.10.*\",\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\": \"6.1.167\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.124\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.70\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.10\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","score":7.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/66e4b63d61c15de6ca5332d9ca6db59a404d7136","https://git.kernel.org/stable/c/29681ed51e737be14d18ecd1c304c57002e4b72c","https://git.kernel.org/stable/c/cfa745830e45ecb75c061aa34330ee0cac941cc7","https://git.kernel.org/stable/c/13336a6239b9d7c6e61483017bb8bdfe3ceb10a5","https://git.kernel.org/stable/c/e41a23e61259f5526af875c3b86b3d42a9bae0e5","https://git.kernel.org/stable/c/8a672f177ebe19c93d795fbe967846084fbc7943","https://git.kernel.org/stable/c/cabd1a976375780dabab888784e356f574bbaed8"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23204","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-23204","identifiers":["CVE-2026-23204"]},"retained":false,"historicalAffected":[]}],"coverage":[]}