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7.8
HIGH CVSS 3.1
CVE-2026-64265
fuse: clear intr_entry in fuse_resend and fuse_remove_pending_req
Overview
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.

Details
INFO

Published Date :

July 25, 2026, 10:17 a.m.

Last Modified :

Aug. 17, 2026, 5:17 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-64265 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Address use-after-free by cleaning up request intr_entry in fuse_resend and fuse_remove_pending_req.
  • Remove intr_entry from fiq->interrupts in fuse_resend.
  • Add WARN_ON for non-empty intr_entry on request destruction.
  • Update the Linux kernel to the resolved version.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-64265.

URL Resource
https://git.kernel.org/stable/c/1d8ecd0cd696a5df0b2f72046a4ccee5d2a8ec2c Patch
https://git.kernel.org/stable/c/7366e6f4d2b4c7002b13fb01219e83679dad4127 Patch
https://git.kernel.org/stable/c/893479015cb6442fd389d3b553ab3036c9541715 Patch
https://git.kernel.org/stable/c/f8fce75fedf73ac72aa09163deb8f4291fdcaad2 Patch
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-64265 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-64265 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-64265 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-64265 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '760eac73f9f69aa28fcb3050b4946c2dcc656d12', 'lessThan': '1d8ecd0cd696a5df0b2f72046a4ccee5d2a8ec2c', 'versionType': 'git'}, {'status': 'affected', 'version': '760eac73f9f69aa28fcb3050b4946c2dcc656d12', 'lessThan': '7366e6f4d2b4c7002b13fb01219e83679dad4127', 'versionType': 'git'}, {'status': 'affected', 'version': '760eac73f9f69aa28fcb3050b4946c2dcc656d12', 'lessThan': '893479015cb6442fd389d3b553ab3036c9541715', 'versionType': 'git'}, {'status': 'affected', 'version': '760eac73f9f69aa28fcb3050b4946c2dcc656d12', 'lessThan': 'f8fce75fedf73ac72aa09163deb8f4291fdcaad2', 'versionType': 'git'}], 'programFiles': ['fs/fuse/dev.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.9'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.9', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/fuse/dev.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '760eac73f9f69aa28fcb3050b4946c2dcc656d12', 'lessThan': '1d8ecd0cd696a5df0b2f72046a4ccee5d2a8ec2c', 'versionType': 'git'}, {'status': 'affected', 'version': '760eac73f9f69aa28fcb3050b4946c2dcc656d12', 'lessThan': '7366e6f4d2b4c7002b13fb01219e83679dad4127', 'versionType': 'git'}, {'status': 'affected', 'version': '760eac73f9f69aa28fcb3050b4946c2dcc656d12', 'lessThan': '893479015cb6442fd389d3b553ab3036c9541715', 'versionType': 'git'}, {'status': 'affected', 'version': '760eac73f9f69aa28fcb3050b4946c2dcc656d12', 'lessThan': 'f8fce75fedf73ac72aa09163deb8f4291fdcaad2', 'versionType': 'git'}], 'programFiles': ['fs/fuse/dev.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.9'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.9', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/fuse/dev.c'], 'defaultStatus': 'affected'}]
  • Initial Analysis by [email protected]

    Aug. 12, 2026

    Action Type Old Value New Value
    Added CWE CWE-416
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.39 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.1.4 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.9 up to (excluding) 6.12.96
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/1d8ecd0cd696a5df0b2f72046a4ccee5d2a8ec2c Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/7366e6f4d2b4c7002b13fb01219e83679dad4127 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/893479015cb6442fd389d3b553ab3036c9541715 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/f8fce75fedf73ac72aa09163deb8f4291fdcaad2 Types: Patch
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 27, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 25, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '760eac73f9f69aa28fcb3050b4946c2dcc656d12', 'lessThan': '1d8ecd0cd696a5df0b2f72046a4ccee5d2a8ec2c', 'versionType': 'git'}, {'status': 'affected', 'version': '760eac73f9f69aa28fcb3050b4946c2dcc656d12', 'lessThan': '7366e6f4d2b4c7002b13fb01219e83679dad4127', 'versionType': 'git'}, {'status': 'affected', 'version': '760eac73f9f69aa28fcb3050b4946c2dcc656d12', 'lessThan': '893479015cb6442fd389d3b553ab3036c9541715', 'versionType': 'git'}, {'status': 'affected', 'version': '760eac73f9f69aa28fcb3050b4946c2dcc656d12', 'lessThan': 'f8fce75fedf73ac72aa09163deb8f4291fdcaad2', 'versionType': 'git'}], 'programFiles': ['fs/fuse/dev.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.9'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.9', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/fuse/dev.c'], 'defaultStatus': 'affected'}]
    Added 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.
    Added Reference https://git.kernel.org/stable/c/1d8ecd0cd696a5df0b2f72046a4ccee5d2a8ec2c
    Added Reference https://git.kernel.org/stable/c/7366e6f4d2b4c7002b13fb01219e83679dad4127
    Added Reference https://git.kernel.org/stable/c/893479015cb6442fd389d3b553ab3036c9541715
    Added Reference https://git.kernel.org/stable/c/f8fce75fedf73ac72aa09163deb8f4291fdcaad2
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
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