{"schema":"threatline.record/2","record":{"id":"CVE-2026-93240","aliases":[],"summary":"memcg: make the v1 soft limit knob inert","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmemcg: make the v1 soft limit knob inert\n\nThe v1 soft limit has been deprecated since v6.12 and nobody has reported\ndepending on it.  Start the removal by decoupling the interface from the\nimplementation: keep memory.soft_limit_in_bytes, but ignore writes to it\nand always report the maximum value on read similar to what\nmemory.kmem.limit_in_bytes already does.\n\nWrites are still parsed, so malformed input keeps returning -EINVAL.  The\nknob now also behaves the same everywhere: it used to return -EOPNOTSUPP\non PREEMPT_RT, where soft limit reclaim has always been disabled.\n\nThis also fixes the syzbot report linked below.  Soft limit reclaim is the\nonly caller that runs shrink_lruvec() from kswapd against a specific\nmemcg, so it is the only way to reach lru_gen_shrink_lruvec() and in turn\nset_mm_walk(), which warns when called from kswapd.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93240","source_modified_at":"2026-10-21T12:52:27.295Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"e9d4e1ee788097484606c32122f146d802a9c5fb","lessThan":"bf75f14d755f9cfbb246e6cc011b53cdd5142de3","status":"affected","versionType":"git"},{"version":"e9d4e1ee788097484606c32122f146d802a9c5fb","lessThan":"72fb67f6e0e5d78e4f34cf9929d1afdb0fd54203","status":"affected","versionType":"git"},{"version":"e9d4e1ee788097484606c32122f146d802a9c5fb","lessThan":"0a90e268cce7023f34087bfa4affb42e29ff5f45","status":"affected","versionType":"git"},{"version":"e9d4e1ee788097484606c32122f146d802a9c5fb","lessThan":"5ec8f629a300cc40e746d6178f724bdff7683fa7","status":"affected","versionType":"git"},{"version":"e9d4e1ee788097484606c32122f146d802a9c5fb","lessThan":"a3417097fb107cea3358b19bcbb4eb655fd67f8c","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93240","source_modified_at":"2026-10-21T12:52:27.295Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.3","status":"affected"},{"version":"0","lessThan":"6.3","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.110","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.51","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.5","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-2026-93240","source_modified_at":"2026-10-21T12:52:27.295Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"72fb67f6e0e5d78e4f34cf9929d1afdb0fd54203","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93240","source_modified_at":"2026-10-21T12:52:27.295Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"0a90e268cce7023f34087bfa4affb42e29ff5f45","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93240","source_modified_at":"2026-10-21T12:52:27.295Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"5ec8f629a300cc40e746d6178f724bdff7683fa7","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00218,"percentile":0.11662,"score_date":"2026-10-23"},"published_at":"2026-09-24T15:34:32.134Z","modified_at":"2026-10-21T12:52:27.295Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-93240","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:52:27.295Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-93240","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/bf75f14d755f9cfbb246e6cc011b53cdd5142de3"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/72fb67f6e0e5d78e4f34cf9929d1afdb0fd54203"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/0a90e268cce7023f34087bfa4affb42e29ff5f45"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/5ec8f629a300cc40e746d6178f724bdff7683fa7"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/a3417097fb107cea3358b19bcbb4eb655fd67f8c"}],"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":"2026-10-21T12:52:27.295Z","content_hash":"7636a0cc3dd17ff6b9d5783945cee7ec6cc9a4047a497d9f8181175ba0b691c7"}}