{"schema":"threatline.record/2","record":{"id":"CVE-2026-98027","aliases":[],"summary":"net: dsa: mv88e6xxx: bound the policy rule dump by the caller's buffer size","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: mv88e6xxx: bound the policy rule dump by the caller's buffer size\n\nmv88e6xxx_get_rxnfc() uses rxnfc->rule_cnt as the write index while\ndumping the policy IDR, clobbering the input value before it has been\nlooked at.  That input is the number of entries the caller had room for.\nETHTOOL_GRXCLSRLALL requires no CAP_NET_ADMIN and the ioctl sizes the\nbuffer from the rule_cnt userspace passes in, so once an admin has\ninstalled policy rules any user can ask for fewer slots than there are\nrules and run off the end of the allocation.  A rule_cnt of 0 leaves the\nbuffer pointer NULL and the walk dereferences it.\n\nCount into a local so the caller's limit survives the walk, and stop with\n-EMSGSIZE once it is reached.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98027","source_modified_at":"2026-10-19T09:12:32.331Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"da7dc87553046a43be1620a783ce3d9f6583d322","lessThan":"7e4bfc5f0b66feb22cba821303fc25ca22cd0887","status":"affected","versionType":"git"},{"version":"da7dc87553046a43be1620a783ce3d9f6583d322","lessThan":"01124cd2cf4b71755b1130ac82d78dcfbd5d69e3","status":"affected","versionType":"git"},{"version":"da7dc87553046a43be1620a783ce3d9f6583d322","lessThan":"609c4378f212cf580aae02250f1146caf63d873f","status":"affected","versionType":"git"},{"version":"da7dc87553046a43be1620a783ce3d9f6583d322","lessThan":"c5b5c52b6524c9fb50def2260baac745c095ec3a","status":"affected","versionType":"git"},{"version":"da7dc87553046a43be1620a783ce3d9f6583d322","lessThan":"44cd4674d9aa5bdf793b8a8b481c9e8536ed6070","status":"affected","versionType":"git"},{"version":"da7dc87553046a43be1620a783ce3d9f6583d322","lessThan":"7a683c2b062810bca203e41866389daf387c235b","status":"affected","versionType":"git"},{"version":"da7dc87553046a43be1620a783ce3d9f6583d322","lessThan":"cda5ac8fe8ac8e80b1703ebb8c4250726fc19739","status":"affected","versionType":"git"},{"version":"da7dc87553046a43be1620a783ce3d9f6583d322","lessThan":"b1fffc273112e7284c5b705e186b43b5770cd3d5","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98027","source_modified_at":"2026-10-19T09:12:32.331Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.4","status":"affected"},{"version":"0","lessThan":"5.4","status":"unaffected","versionType":"semver"},{"version":"5.10.271","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.111","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.53","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.7","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98027","source_modified_at":"2026-10-19T09:12:32.331Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"7e4bfc5f0b66feb22cba821303fc25ca22cd0887","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98027","source_modified_at":"2026-10-19T09:12:32.331Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"01124cd2cf4b71755b1130ac82d78dcfbd5d69e3","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98027","source_modified_at":"2026-10-19T09:12:32.331Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"609c4378f212cf580aae02250f1146caf63d873f","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98027","source_modified_at":"2026-10-19T09:12:32.331Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"44cd4674d9aa5bdf793b8a8b481c9e8536ed6070","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98027","source_modified_at":"2026-10-19T09:12:32.331Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"7a683c2b062810bca203e41866389daf387c235b","basis":"first unaffected version stated in the CVE record"}],"cvss":7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00122,"percentile":0.01817,"score_date":"2026-10-23"},"published_at":"2026-09-25T10:23:45.123Z","modified_at":"2026-10-19T09:12:32.331Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98027","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:12:32.331Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98027","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/7e4bfc5f0b66feb22cba821303fc25ca22cd0887"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/01124cd2cf4b71755b1130ac82d78dcfbd5d69e3"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/609c4378f212cf580aae02250f1146caf63d873f"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c5b5c52b6524c9fb50def2260baac745c095ec3a"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/44cd4674d9aa5bdf793b8a8b481c9e8536ed6070"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/7a683c2b062810bca203e41866389daf387c235b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/cda5ac8fe8ac8e80b1703ebb8c4250726fc19739"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b1fffc273112e7284c5b705e186b43b5770cd3d5"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:12:32.331Z","content_hash":"a46920c87df08116394889d0f52c8e5015965ec4ec92318a532913ad00138a58"}}