---
id: CVE-2026-80691
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  scsi: target: iblock: Fix wrong PR ops NULL check for PREEMPT/RELEASE

  In the iblock_execute_pr_out() function, PRO_PREEMPT,
  PRO_PREEMPT_AND_ABORT, and PRO_RELEASE all …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  scsi: target: iblock: Fix wrong PR ops NULL check for PREEMPT/RELEASE

  In the iblock_execute_pr_out() function, PRO_PREEMPT,
  PRO_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'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

scsi: target: iblock: Fix wrong PR ops NULL check for PREEMPT/RELEASE

In the iblock_execute_pr_out() function, PRO_PREEMPT,
PRO_PREEMPT_AND_ABORT, and PRO_RELEASE all perform callback capability
checks through ops->pr_clear. The error check allows unimplemented hooks
to pass through the gate, resulting dereferencing a NULL function
pointer.

Check whether the hooks that need to be called are supported.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **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)