CVE-2026-23204 (GCVE-0-2026-23204)
Vulnerability from cvelistv5
Published
2026-02-14 16:27
Modified
2026-08-05 12:20
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_u32: use skb_header_pointer_careful() skb_header_pointer() does not fully validate negative @offset values. Use skb_header_pointer_careful() instead. GangMin Kim provided a report and a repro fooling u32_classify(): BUG: KASAN: slab-out-of-bounds in u32_classify+0x1180/0x11b0 net/sched/cls_u32.c:221
References
Impacted products
Vendor Product Version
Linux Linux Version: fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d
Version: fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d
Version: fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d
Version: fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d
Version: fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d
Version: fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d
Version: fbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d
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{\"status\": \"unaffected\", \"version\": \"6.19\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/sched/cls_u32.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/66e4b63d61c15de6ca5332d9ca6db59a404d7136\"}, {\"url\": \"https://git.kernel.org/stable/c/29681ed51e737be14d18ecd1c304c57002e4b72c\"}, {\"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\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.260\", \"versionStartIncluding\": \"2.6.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.209\", \"versionStartIncluding\": \"2.6.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.167\", \"versionStartIncluding\": \"2.6.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.124\", \"versionStartIncluding\": \"2.6.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.70\", \"versionStartIncluding\": \"2.6.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.10\", \"versionStartIncluding\": \"2.6.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.19\", \"versionStartIncluding\": \"2.6.35\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-07-04T11:50:26.593Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-23204\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-14T12:46:10.228Z\", \"dateReserved\": \"2026-01-13T15:37:45.986Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2026-02-14T16:27:27.708Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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