What is the CVSS score of CVE-2026-64266?

CVE-2026-64266 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Is there a patch available for CVE-2026-64266?

Yes, a patch is available for CVE-2026-64266. Update the affected software to the latest version immediately.

Linux CVE-2026-64266

EUVD-2026-48978 HIGH

Use After Free (CWE-416)

2026-07-25 Linux

GHSA-x828-8hm7-w4xw

Information Disclosure Linux Use After Free Memory Corruption

7.8

CVSS 3.1 · Vendor: Linux

Severity by source

Vendor (Linux) PRIMARY

7.8 HIGH

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SUSE

5.5 MEDIUM

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Red Hat

7.0 MEDIUM

qualitative

Primary rating from Vendor (Linux).

CVSS VectorVendor: Linux

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Jul 27, 2026 - 05:28 vuln.today

CVSS changed

Jul 27, 2026 - 05:22 NVD

7.8 (HIGH)

Patch available

Jul 25, 2026 - 11:18 EUVD

CVE Published

Jul 25, 2026 - 08:49 cve.org

UNKNOWN (no severity yet)

CVE Published

Jul 25, 2026 - 08:49 cve.org

HIGH 7.8

DescriptionCVE.org

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

fuse: re-lock request before returning from fuse_ref_folio()

fuse_ref_folio() unlocks the request but does not re-lock it before returning. fuse_chan_abort() can end the request and the async end callback (eg fuse_writepage_free()) can free the args while the subsequent copy chain logic after fuse_ref_folio() accesses them, leading to use-after-free issues.

Fix this by locking the request in fuse_ref_folio() before returning.

AnalysisAI

A use-after-free in the FUSE subsystem of the Linux kernel allows a local attacker with permission to mount a FUSE filesystem to escalate privileges or crash the system. The vulnerability exists in fuse_ref_folio() due to improper request locking, and affects kernel versions from 2.6.35 through unpatched longterm branches. Patches are available, and no active exploitation or public exploit code has been identified.

Same weakness CWE-416 – Use After Free

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Vendor StatusVendor

SUSE

Severity: Moderate

Product	Status
SUSE Linux Enterprise Desktop 15 SP7	Not-Affected
SUSE Linux Enterprise Desktop 15 SP7	Not-Affected
SUSE Linux Enterprise High Availability Extension 15 SP7	Not-Affected
SUSE Linux Enterprise High Availability Extension 15 SP7	Not-Affected
SUSE Linux Enterprise High Availability Extension 16.0	Not-Affected

CVE-2026-64266 vulnerability details – vuln.today

Back

Linux CVE-2026-64266

Severity by source

CVSS VectorVendor: Linux

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Same weakness CWE-416 – Use After Free

Same technique Information Disclosure

Vendor StatusVendor

SUSE

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External POC / Exploit Code