{"id":"CVE-2026-80691","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: iblock: Fix wrong PR ops NULL check for PREEMPT/RELEASE\n\nIn the iblock_execute_pr_out() function, PRO_PREEMPT,\nPRO_PREEMPT_AND_ABORT, and PRO_RELEASE all …","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: iblock: Fix wrong PR ops NULL check for PREEMPT/RELEASE\n\nIn the iblock_execute_pr_out() function, PRO_PREEMPT,\nPRO_PREEMPT_AND_ABORT, and PRO_RELEASE all …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-476"],"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","affected":["enterprise_linux 10","enterprise_linux 6"],"published":"2026-08-28","updated":"2026-10-16","sourceUpdated":"2026-10-16T20:18:06.600","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80691","references":[{"url":"https://git.kernel.org/stable/c/3c60a8b4037dc35e365658fcbcb349a5d742ff49","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9c33222bd387312874fbe36ca8002e5c945b9653","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a326b19cfb7775378b50acaa8d836ba44e29b4c2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bdd8a1297ef101bb5ac57e53b4fbe5e364afd8b1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f15bcf9a99b1b2683fcfa005b9b3680b5600581f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80691.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80691"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2525480"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80691"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80691"},{"url":"https://kernelcve.org/list/?q=CVE-2026-80691"},{"url":"https://lore.kernel.org/linux-cve-announce/2026082803-CVE-2026-80691-7a1c@gregkh/T"}],"tags":["nvd","csaf","vex","red-hat","cve.org"],"epss":0.00441,"epssPercentile":0.38096,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T19:20:02.512746Z"},"scores":{"nvd":7.5,"vendor":6.2,"cna":7.5},"ingestedAt":"2026-10-16T19:46:24.306Z","slug":"CVE-2026-80691","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: iblock: Fix wrong PR ops NULL check for PREEMPT/RELEASE\n\nIn the iblock_execute_pr_out() function, PRO_PREEMPT,\nPRO_PREEMPT_AND_ABORT, and PRO_RELEASE all perform callback capability\nchecks through ops->pr_clear. The error check allows unimplemented hooks\nto pass through the gate, resulting dereferencing a NULL function\npointer.\n\nCheck whether the hooks that need to be called are supported.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10 · updated 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80691.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":230425,"id":"CVE-2026-80691","ts":1793134643704,"field":"cvss","old":"6.2","new":"7.5"},{"seq":230424,"id":"CVE-2026-80691","ts":1793134643704,"field":"severity","old":"medium","new":"high"},{"seq":228556,"id":"CVE-2026-80691","ts":1792844788040,"field":"cvss","old":"7.5","new":"6.2"},{"seq":228555,"id":"CVE-2026-80691","ts":1792844788040,"field":"severity","old":"high","new":"medium"}]}