fuse: clear intr_entry in fuse_resend and fuse_remove_pending_req (CVE-2026-64265) | HOL Guard CVE

High · CVSS 7.8CVE-2026-64265

fuse: clear intr_entry in fuse_resend and fuse_remove_pending_req

Answer in brief

CVE-2026-64265 records a High severity (CVSS 7.8) vulnerability in fuse: clear intr_entry in fuse_resend and fuse_remove_pending_req. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 25, 2026Updated Aug 17, 2026Source checked Sep 19, 2026First seen by HOL Aug 5, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:o:linux:linux_kernel::::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=760eac73f9f69aa28fcb3050b4946c2dcc656d12 <1d8ecd0cd696a5df0b2f72046a4ccee5d2a8ec2c \|\| >=760eac73f9f69aa28fcb3050b4946c2dcc656d12 <7366e6f4d2b4c7002b13fb01219e83679dad4127 \|\| >=760eac73f9f69aa28fcb3050b4946c2dcc656d12 <893479015cb6442fd389d3b553ab3036c9541715 \|\| >=760eac73f9f69aa28fcb3050b4946c2dcc656d12 <f8fce75fedf73ac72aa09163deb8f4291fdcaad2	1d8ecd0cd696a5df0b2f72046a4ccee5d2a8ec2c, 7366e6f4d2b4c7002b13fb01219e83679dad4127, 893479015cb6442fd389d3b553ab3036c9541715, f8fce75fedf73ac72aa09163deb8f4291fdcaad2
Linux/Linuxgeneric	6.9	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 1d8ecd0cd696a5df0b2f72046a4ccee5d2a8ec2c if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 5, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.