{"id":"CVE-2026-98587","title":"firewire: cdev: fix back-transition for iso_resource_auto client resource","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nfirewire: cdev: fix back-transition for iso_resource_auto client resource\n\nThe todo member of iso_resource_auto structure represents the state of the\nclient resource an…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= fcabbf40fae501379b4f3a057febe92d4b0ebdd8 < ee1df60a0d0e8ab4b00137135733bdadd6d33dab","Linux >= fcabbf40fae501379b4f3a057febe92d4b0ebdd8 < c6b51091cafff9ce6c03c1416aa13864d17ab97c","Linux 7.2"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:19:00.077Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98587","references":[{"url":"https://git.kernel.org/stable/c/ee1df60a0d0e8ab4b00137135733bdadd6d33dab"},{"url":"https://git.kernel.org/stable/c/c6b51091cafff9ce6c03c1416aa13864d17ab97c"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T15:45:12.251Z","slug":"CVE-2026-98587","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nfirewire: cdev: fix back-transition for iso_resource_auto client resource\n\nThe todo member of iso_resource_auto structure represents the state of the\nclient resource and normally transitions in the following order:\n\n    ISO_RES_AUTO_ALLOC -> ISO_RES_AUTO_REALLOC -> ISO_RES_AUTO_DEALLOC\n\nHowever, concurrent access from the work item and the file descriptor\nrelease function can cause the state to transition backwards from\nISO_RES_AUTO_DEALLOC to ISO_RES_AUTO_REALLOC.\n\nPrevent the back-transition by checking the current state before\nupdating it in the work item.\n\n## Affected\n\n- `Linux >= fcabbf40fae501379b4f3a057febe92d4b0ebdd8 < ee1df60a0d0e8ab4b00137135733bdadd6d33dab`\n- `Linux >= fcabbf40fae501379b4f3a057febe92d4b0ebdd8 < c6b51091cafff9ce6c03c1416aa13864d17ab97c`\n- `Linux 7.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}