{"id":"CVE-2026-98094","revision":"ed4401bd27374cfebad869a21c91fb7e","records":[{"revision":"ed4401bd27374cfebad869a21c91fb7e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98094","aliases":[],"title":"staging: fbtft: make dirty_lock IRQ-safe","description":"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.","state":0,"publishedAt":"2026-09-25T10:24:25.889+00:00","modifiedAt":"2026-10-19T09:13:46.321+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/staging/fbtft/fbtft-core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"c296d5f9957c03994a699d6739c27d4581a9f6c7\",\n                            \"lessThan\": \"0843298b159599ee7bc6d14800efdb4bc7349706\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c296d5f9957c03994a699d6739c27d4581a9f6c7\",\n                            \"lessThan\": \"a323066337ed85c38decfc7f6bbf42f27605dff1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c296d5f9957c03994a699d6739c27d4581a9f6c7\",\n                            \"lessThan\": \"f2451e18826eb6a33ea51419f39bdd2eb99fa1ea\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c296d5f9957c03994a699d6739c27d4581a9f6c7\",\n                            \"lessThan\": \"10cc145b873670438d3b105133dffdae70822db6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c296d5f9957c03994a699d6739c27d4581a9f6c7\",\n                            \"lessThan\": \"2a609e29efbba79f9abd68c4ec8a2bd7ecf291e7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c296d5f9957c03994a699d6739c27d4581a9f6c7\",\n                            \"lessThan\": \"f0c869df2c33793c8828acaab3e4a5e0176f9f00\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c296d5f9957c03994a699d6739c27d4581a9f6c7\",\n                            \"lessThan\": \"dcb48fde8003492256dee45815144aa5ed26ce7c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c296d5f9957c03994a699d6739c27d4581a9f6c7\",\n                            \"lessThan\": \"f576944a59f31bcffff121117ebf452c5dd162b7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/staging/fbtft/fbtft-core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.271\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.222\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.111\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.53\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.7\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/0843298b159599ee7bc6d14800efdb4bc7349706","https://git.kernel.org/stable/c/a323066337ed85c38decfc7f6bbf42f27605dff1","https://git.kernel.org/stable/c/f2451e18826eb6a33ea51419f39bdd2eb99fa1ea","https://git.kernel.org/stable/c/10cc145b873670438d3b105133dffdae70822db6","https://git.kernel.org/stable/c/2a609e29efbba79f9abd68c4ec8a2bd7ecf291e7","https://git.kernel.org/stable/c/f0c869df2c33793c8828acaab3e4a5e0176f9f00","https://git.kernel.org/stable/c/dcb48fde8003492256dee45815144aa5ed26ce7c","https://git.kernel.org/stable/c/f576944a59f31bcffff121117ebf452c5dd162b7"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98094","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98094","identifiers":["CVE-2026-98094"]},"retained":false,"historicalAffected":[]}],"coverage":[]}