{"schema":"threatline.record/2","record":{"id":"CVE-2026-98033","aliases":[],"summary":"bpf: Preserve inner map identity in callback frames","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Preserve inner map identity in callback frames\n\nCallback frame constructors initialize map-typed argument registers with\n__mark_reg_known_zero() and then restore map_ptr. This clears map_uid,\nwhich is the only field distinguishing inner maps that share an\ninner_map_meta template.\n\nWhen a timer callback invokes bpf_for_each_map_elem() on a second inner\nmap, both the saved first map and the second map value can reach the nested\ncallback as the same template with map_uid zero. bpf_timer_init() then\naccepts pairing the timer from the second map with the first map.\n\nThe runtime records the first map in the timer without taking a reference.\nFreeing that map does not find the timer stored in the second map, so a\nlater timer callback dereferences the freed map.\n\nCopy map_uid from the same caller register as map_ptr when constructing\nfor-each, timer/workqueue, and task-work callback arguments. The existing\nidentity check can then reject mismatched inner maps while allowing a\ncallback value to be paired with its actual map.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98033","source_modified_at":"2026-10-21T12:54:07.398Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"69c087ba6225b574afb6e505b72cb75242a3d844","lessThan":"cf85e4f94d7feef8b3c4c90dbe2468595a48393b","status":"affected","versionType":"git"},{"version":"69c087ba6225b574afb6e505b72cb75242a3d844","lessThan":"166221c52d3ca332f8699a854efca8e2704bb137","status":"affected","versionType":"git"},{"version":"69c087ba6225b574afb6e505b72cb75242a3d844","lessThan":"08b534bafdd9de65b6374474a8fe719c90eb3b01","status":"affected","versionType":"git"},{"version":"69c087ba6225b574afb6e505b72cb75242a3d844","lessThan":"66ff2eff093d2a0838f39c713eeb590bc0946c2a","status":"affected","versionType":"git"},{"version":"69c087ba6225b574afb6e505b72cb75242a3d844","lessThan":"b90c5d770dad910fb89e6c1b15052a8a1e8db752","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98033","source_modified_at":"2026-10-21T12:54:07.398Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.13","status":"affected"},{"version":"0","lessThan":"5.13","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.114","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.57","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-2026-98033","source_modified_at":"2026-10-21T12:54:07.398Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"166221c52d3ca332f8699a854efca8e2704bb137","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98033","source_modified_at":"2026-10-21T12:54:07.398Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"08b534bafdd9de65b6374474a8fe719c90eb3b01","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98033","source_modified_at":"2026-10-21T12:54:07.398Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"66ff2eff093d2a0838f39c713eeb590bc0946c2a","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00168,"percentile":0.05756,"score_date":"2026-10-23"},"published_at":"2026-09-25T10:23:48.761Z","modified_at":"2026-10-21T12:54:07.398Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98033","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:54:07.398Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98033","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/cf85e4f94d7feef8b3c4c90dbe2468595a48393b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/166221c52d3ca332f8699a854efca8e2704bb137"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/08b534bafdd9de65b6374474a8fe719c90eb3b01"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/66ff2eff093d2a0838f39c713eeb590bc0946c2a"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b90c5d770dad910fb89e6c1b15052a8a1e8db752"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-21T12:54:07.398Z","content_hash":"173a46be9f02cc322bbb8899b29f1441f9913c659cc6132a293c9dbd8ce787c5"}}