{"schema":"threatline.record/2","record":{"id":"CVE-2026-98622","aliases":[],"summary":"net/sched: act_ct: don't WARN on benign flow_offload_alloc() failure","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_ct: don't WARN on benign flow_offload_alloc() failure\n\nflow_offload_alloc() returns NULL when the conntrack entry is dying\n(e.g. raced with a conntrack flush) or when the GFP_ATOMIC allocation\nfails; both are expected under load and neither is a kernel bug. This\npath runs from softirq on every committed packet, so with\npanic_on_warn=1 an unprivileged user can panic the box just by racing\na conntrack flush against a `tc ... action ct commit` classifier.\n\nReproduced with a custom repro under QEMU: a small, fixed set of UDP\nflows through `tc filter ... action ct commit` on lo, raced against\nthreads flooding bare ctnetlink CT_DELETE (flush) requests. Hits\nWARNING: net/sched/act_ct.c:437 (tcf_ct_flow_table_add(), inlined\ninto tcf_ct_act() in this build) within ~15s on the unpatched kernel;\nsame setup is clean on the patched kernel. The fix itself is\nbehavior-preserving: both branches already did `goto err_alloc`\nbefore and after, only the WARN is removed.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98622","source_modified_at":"2026-10-19T09:22:50.359Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"64ff70b80fd403110b67dd9f7184a604fdb0da43","lessThan":"e8fcf3f08834e939b797311742ee72b1e2a08096","status":"affected","versionType":"git"},{"version":"64ff70b80fd403110b67dd9f7184a604fdb0da43","lessThan":"af475f599270e59313552e6c6f3af8507da672b8","status":"affected","versionType":"git"},{"version":"64ff70b80fd403110b67dd9f7184a604fdb0da43","lessThan":"424ba52c0058deeb940d02cba52eb0aeb288db33","status":"affected","versionType":"git"},{"version":"64ff70b80fd403110b67dd9f7184a604fdb0da43","lessThan":"d512c484bd93a5f2794aa03c9faeb7bcb82dbd4a","status":"affected","versionType":"git"},{"version":"64ff70b80fd403110b67dd9f7184a604fdb0da43","lessThan":"d805560ad69cb266d669341ca01e26bffb0d2c67","status":"affected","versionType":"git"},{"version":"64ff70b80fd403110b67dd9f7184a604fdb0da43","lessThan":"00734f3684fcec42c319bedfe68a5d357c720b53","status":"affected","versionType":"git"},{"version":"64ff70b80fd403110b67dd9f7184a604fdb0da43","lessThan":"650787233c2fd6e515a7c5f371019a9fa080ccd2","status":"affected","versionType":"git"},{"version":"64ff70b80fd403110b67dd9f7184a604fdb0da43","lessThan":"47abe7a5c4eb53269aca3506446f851572a059a3","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98622","source_modified_at":"2026-10-19T09:22:50.359Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.7","status":"affected"},{"version":"0","lessThan":"5.7","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":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.55","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.9","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-2026-98622","source_modified_at":"2026-10-19T09:22:50.359Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"424ba52c0058deeb940d02cba52eb0aeb288db33","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98622","source_modified_at":"2026-10-19T09:22:50.359Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"00734f3684fcec42c319bedfe68a5d357c720b53","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98622","source_modified_at":"2026-10-19T09:22:50.359Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"650787233c2fd6e515a7c5f371019a9fa080ccd2","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98622","source_modified_at":"2026-10-19T09:22:50.359Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"47abe7a5c4eb53269aca3506446f851572a059a3","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00176,"percentile":0.06838,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:19:42.514Z","modified_at":"2026-10-19T09:22:50.359Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98622","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:22:50.359Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98622","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/e8fcf3f08834e939b797311742ee72b1e2a08096"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/af475f599270e59313552e6c6f3af8507da672b8"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/424ba52c0058deeb940d02cba52eb0aeb288db33"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/d512c484bd93a5f2794aa03c9faeb7bcb82dbd4a"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/d805560ad69cb266d669341ca01e26bffb0d2c67"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/00734f3684fcec42c319bedfe68a5d357c720b53"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/650787233c2fd6e515a7c5f371019a9fa080ccd2"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/47abe7a5c4eb53269aca3506446f851572a059a3"}],"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":"2026-10-19T09:22:50.359Z","content_hash":"191ad1e0efcee14e36ac77ab4943db125a893a01dd2bedb97963338f1adfb016"}}