{"schema":"threatline.record/2","record":{"id":"CVE-2026-98094","aliases":[],"summary":"staging: fbtft: make dirty_lock IRQ-safe","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: fbtft: make dirty_lock IRQ-safe\n\nfbtft_mkdirty() can be reached from the fbcon rendering path while\nprocessing printk() in hardirq context. Meanwhile, dirty_lock is also\ntaken by fbtft_deferred_io() in workqueue context with local interrupts\nenabled.\n\nLockdep reports a possible IRQ lock inversion involving dirty_lock and\nconsole_owner. A hardirq can interrupt a CPU holding dirty_lock and\nenter the console rendering path, which can attempt to acquire\ndirty_lock again.\n\nThe following lockdep report was observed on an RK3566 system with\nCONFIG_PROVE_LOCKING enabled:\n\n  WARNING: possible irq lock inversion dependency detected\n  swapper/2/0 just changed the state of lock:\n  (console_owner){-...}-{0:0}\n  but this lock took another, HARDIRQ-unsafe lock in the past:\n  (&par->dirty_lock){+.+.}-{2:2}\n\n  CPU0                    CPU1\n  ----                    ----\n  lock(&par->dirty_lock);\n                         local_irq_disable();\n                         lock(console_owner);\n                         lock(&par->dirty_lock);\n  <Interrupt>\n    lock(console_owner);\n\n  *** DEADLOCK ***\n\nUse spin_lock_irqsave() for fbtft_mkdirty() and spin_lock_irq() for\nfbtft_deferred_io(). They only access the dirty line range, so the\nIRQ-off regions remain short.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98094","source_modified_at":"2026-10-19T09:13:46.321Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"c296d5f9957c03994a699d6739c27d4581a9f6c7","lessThan":"0843298b159599ee7bc6d14800efdb4bc7349706","status":"affected","versionType":"git"},{"version":"c296d5f9957c03994a699d6739c27d4581a9f6c7","lessThan":"a323066337ed85c38decfc7f6bbf42f27605dff1","status":"affected","versionType":"git"},{"version":"c296d5f9957c03994a699d6739c27d4581a9f6c7","lessThan":"f2451e18826eb6a33ea51419f39bdd2eb99fa1ea","status":"affected","versionType":"git"},{"version":"c296d5f9957c03994a699d6739c27d4581a9f6c7","lessThan":"10cc145b873670438d3b105133dffdae70822db6","status":"affected","versionType":"git"},{"version":"c296d5f9957c03994a699d6739c27d4581a9f6c7","lessThan":"2a609e29efbba79f9abd68c4ec8a2bd7ecf291e7","status":"affected","versionType":"git"},{"version":"c296d5f9957c03994a699d6739c27d4581a9f6c7","lessThan":"f0c869df2c33793c8828acaab3e4a5e0176f9f00","status":"affected","versionType":"git"},{"version":"c296d5f9957c03994a699d6739c27d4581a9f6c7","lessThan":"dcb48fde8003492256dee45815144aa5ed26ce7c","status":"affected","versionType":"git"},{"version":"c296d5f9957c03994a699d6739c27d4581a9f6c7","lessThan":"f576944a59f31bcffff121117ebf452c5dd162b7","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98094","source_modified_at":"2026-10-19T09:13:46.321Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"4.0","status":"affected"},{"version":"0","lessThan":"4.0","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-2026-98094","source_modified_at":"2026-10-19T09:13:46.321Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"0843298b159599ee7bc6d14800efdb4bc7349706","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98094","source_modified_at":"2026-10-19T09:13:46.321Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"10cc145b873670438d3b105133dffdae70822db6","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98094","source_modified_at":"2026-10-19T09:13:46.321Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"2a609e29efbba79f9abd68c4ec8a2bd7ecf291e7","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00176,"percentile":0.06834,"score_date":"2026-10-23"},"published_at":"2026-09-25T10:24:25.889Z","modified_at":"2026-10-19T09:13:46.321Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98094","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:13:46.321Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98094","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/0843298b159599ee7bc6d14800efdb4bc7349706"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/a323066337ed85c38decfc7f6bbf42f27605dff1"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/f2451e18826eb6a33ea51419f39bdd2eb99fa1ea"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/10cc145b873670438d3b105133dffdae70822db6"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/2a609e29efbba79f9abd68c4ec8a2bd7ecf291e7"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/f0c869df2c33793c8828acaab3e4a5e0176f9f00"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/dcb48fde8003492256dee45815144aa5ed26ce7c"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/f576944a59f31bcffff121117ebf452c5dd162b7"}],"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":"2026-10-19T09:13:46.321Z","content_hash":"3551ec46841be48fd40033cde3b0ee2cb503ee0fd137857ee55e7ed31c12ecb2"}}