{"id":"CVE-2026-98587","title":"kernel: firewire: cdev: fix back-transition for iso_resource_auto client resource (CVE-2026-98587)","summary":"A flaw was found in the Linux kernel's FireWire subsystem. A local user can trigger a race condition by concurrently releasing a device file descriptor while an asynchronous resource management task is running. This flaw allows a resource …","severity":"medium","cvss":4.7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-366","vendor":"Red Hat","product":"Red Hat Enterprise Linux 6","affected":["enterprise_linux 6"],"published":"2026-10-18","updated":"2026-10-20","sourceUpdated":"2026-10-20T04:17:38+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98587.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98587.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98587"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2554981"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98587"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98587"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98587.mbox"},{"url":"https://git.kernel.org/stable/c/ee1df60a0d0e8ab4b00137135733bdadd6d33dab"},{"url":"https://git.kernel.org/stable/c/c6b51091cafff9ce6c03c1416aa13864d17ab97c"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00189,"epssPercentile":0.08507,"ingestedAt":"2026-10-18T15:45:12.251Z","slug":"CVE-2026-98587","body":"## Overview\n\nA flaw was found in the Linux kernel's FireWire subsystem. A local user can trigger a race condition by concurrently releasing a device file descriptor while an asynchronous resource management task is running. This flaw allows a resource state to transition backwards from deallocation to reallocation, leading to inconsistent internal states and a potential Denial of Service (DoS) through a system crash.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6 · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98587.json)\n\n**kernel: firewire: cdev: fix back-transition for iso_resource_auto client resource** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-20.\n\nAffected:\n\n- Red Hat Enterprise Linux 6\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 6\n\nNot affected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nOut of support scope","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":225747,"id":"CVE-2026-98587","ts":1792498421031,"field":"cvss","old":null,"new":"4.7"},{"seq":225746,"id":"CVE-2026-98587","ts":1792498421031,"field":"severity","old":"none","new":"medium"}]}