CVE-2026-99112

{"id": "CVE-2026-99112", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "238b5ebdb6a6e4bc90810b9f8ec0063b3dfda41a", "lessThan": "a9283d006eef7e3b56f0f279a49bb63f6e5e61df", "versionType": "git"}, {"status": "affected", "version": "c96adff95619178e2118925578343ad54857c80c", "lessThan": "497944d534ffb1be300365523030c7c6517cbbb6", "versionType": "git"}, {"status": "affected", "version": "c96adff95619178e2118925578343ad54857c80c", "lessThan": "a55d84907337580d91c0d54779d9d4b934633158", "versionType": "git"}, {"status": "affected", "version": "c96adff95619178e2118925578343ad54857c80c", "lessThan": "cff9bf34afde46c238189cc6f7690b7e35225df1", "versionType": "git"}, {"status": "affected", "version": "c96adff95619178e2118925578343ad54857c80c", "lessThan": "35354bf67aa0f7bace66ffb614906124ed50d59d", "versionType": "git"}, {"status": "affected", "version": "c96adff95619178e2118925578343ad54857c80c", "lessThan": "45e60747a9db2307929260d9aa9c1c6cbb70ee77", "versionType": "git"}, {"status": "affected", "version": "c96adff95619178e2118925578343ad54857c80c", "lessThan": "bb187146c7e5c666874784e4f3fc1bc5126e6e92", "versionType": "git"}, {"status": "affected", "version": "c96adff95619178e2118925578343ad54857c80c", "lessThan": "fee10655709c5c597e8e9f722f3035d9ea31ff3a", "versionType": "git"}, {"status": "affected", "version": "5.10.11", "lessThan": "5.10.273", "versionType": "semver"}], "programFiles": ["net/sched/cls_flower.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.11"}, {"status": "unaffected", "version": "0", "lessThan": "5.11", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.273", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.224", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.191", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.161", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.115", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.59", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.2.13", "versionType": "semver", "lessThanOrEqual": "7.2.*"}, {"status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/sched/cls_flower.c"], "defaultStatus": "affected"}]}], "published": "2026-10-28T11:17:30.640", "references": [{"url": "https://git.kernel.org/stable/c/35354bf67aa0f7bace66ffb614906124ed50d59d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/45e60747a9db2307929260d9aa9c1c6cbb70ee77", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/497944d534ffb1be300365523030c7c6517cbbb6", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a55d84907337580d91c0d54779d9d4b934633158", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a9283d006eef7e3b56f0f279a49bb63f6e5e61df", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/bb187146c7e5c666874784e4f3fc1bc5126e6e92", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/cff9bf34afde46c238189cc6f7690b7e35225df1", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/fee10655709c5c597e8e9f722f3035d9ea31ff3a", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: cls_flower: validate mask pointer after nla_next()\n\nfl_set_enc_opt() iterates the key's nested tunnel-option attributes\nwith nla_for_each_attr() while advancing a single mask pointer via\nnla_next() at the bottom of each loop, so the mask cursor is driven\nby the number of key attributes rather than by the mask's own\nattributes. The nla_ok() added by commit c96adff956191 (\"cls_flower:\ncall nla_ok() before nla_next()\") only validates the mask pointer\nthat was just consumed; the pointer produced by nla_next() is used by\nthe next iteration (fl_set_geneve_opt() and siblings) without any\nvalidation.\n\nThe mask's nested attributes are validated with NL_VALIDATE_LIBERAL,\nwhich merely warns on trailing bytes that do not form a complete\nattribute. A mask carrying one valid attribute plus 1-3 residue\nbytes (or a non-aligned attribute length making msk_depth negative)\ntherefore reaches the next iteration with msk_depth != 0, so neither\nthe !msk_depth check in fl_set_enc_opt() nor the !depth check in the\nper-type helpers fires. nla_type() then reads past the mask payload\nand nla_parse_nested_deprecated() iterates with an nla_len taken\nfrom those bytes, reading well beyond the mask attribute (KASAN:\nslab-out-of-bounds read in __nla_validate_parse from fl_change()).\n\nValidate the advanced mask pointer as well: when the mask is not\nlegitimately exhausted (msk_depth != 0) and the new pointer fails\nnla_ok(), reject the filter with -EINVAL. An exactly exhausted mask\nstill skips the check, preserving exact-match behaviour for the\nremaining key attributes."}], "lastModified": "2026-10-31T13:17:55.973", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}