---
id: CVE-2026-64265
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  fuse: clear intr_entry in fuse_resend and fuse_remove_pending_req

  When fuse_resend() moves a request from fpq->processing back to
  fiq->pending, it sets FR_PENDING and …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  fuse: clear intr_entry in fuse_resend and fuse_remove_pending_req

  When fuse_resend() moves a request from fpq->processing back to
  fiq->pending, it sets FR_PENDING and …
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
published: '2026-07-25'
updated: '2026-07-27'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64265'
references:
  - url: 'https://git.kernel.org/stable/c/1d8ecd0cd696a5df0b2f72046a4ccee5d2a8ec2c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7366e6f4d2b4c7002b13fb01219e83679dad4127'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/893479015cb6442fd389d3b553ab3036c9541715'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f8fce75fedf73ac72aa09163deb8f4291fdcaad2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64265.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-64265'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2507041'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-64265'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64265'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026072558-CVE-2026-64265-5f6c@gregkh/T
  - url: 'https://access.redhat.com/errata/RHSA-2026:64775'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
epss: 0.00163
epssPercentile: 0.05932
ingestedAt: '2026-07-27T06:16:49.670Z'
vendor: Red Hat
product: Red Hat Enterprise Linux BaseOS (v. 10)
affected:
  - enterprise_linux_appstream_v_10
  - enterprise_linux_baseos_v_10
  - enterprise_linux_codeready_linux_builder_v_10
  - enterprise_linux_real_time_for_nfv_v_10
  - enterprise_linux_real_time_v_10
patched:
  - enterprise_linux_appstream_v_10
  - enterprise_linux_baseos_v_10
  - enterprise_linux_codeready_linux_builder_v_10
  - enterprise_linux_real_time_for_nfv_v_10
  - enterprise_linux_real_time_v_10
cwe:
  - CWE-825
---

## Overview

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

fuse: clear intr_entry in fuse_resend and fuse_remove_pending_req

When fuse_resend() moves a request from fpq->processing back to
fiq->pending, it sets FR_PENDING and clears FR_SENT but does not
remove the requests intr_entry from fiq->interrupts.  If the
request had FR_INTERRUPTED set from a prior signal, intr_entry
remains dangling on fiq->interrupts.  When the requesting task
then receives a fatal signal, fuse_remove_pending_req() sees
FR_PENDING=1, removes the request from fiq->pending and frees it
via the refcount path, also without cleaning intr_entry.  The
stale intr_entry causes use-after-free when fuse_read_interrupt()
iterates fiq->interrupts:
  - list_del_init(&req->intr_entry) -> UAF write on freed slab
  - req->in.h.unique -> UAF read, data leaked to userspace

Remove intr_entry from fiq->interrupts in fuse_resend() for
interrupted requests before they are placed back on fiq->pending.

Add a WARN_ON if the intr_entry is not empty on request destruction.

## Remediation

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

## Vendor advisories

- **RHSA-2026:64775** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10), Red Hat Enterprise Linux Real Time (v. 10) · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:64775)