What is CVE-2026-64146?

CVE-2026-64146 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Memory Leak flaw (CWE-401), affecting Linux kernel versions from 5.17 onward and patched in 7.0.11 and 7.1. CVE-2026-64146 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64146?

CVE-2026-64146 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-64146?

Yes, CVE-2026-64146 has been patched. Fixed versions include 7.0.11 and 7.1. If you are running Linux kernel 5.17 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64146 actively exploited?

CVE-2026-64146 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Memory Leak (CWE-401)?

The product does not release memory after use, causing gradual resource exhaustion. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/401.html

CVE-2026-64146

Medium

In the Linux kernel, the following vulnerability has been resolved: erofs: fix metabuf leak in inode xattr initialization commit bb88e8da0025 ("erofs: use meta buffers for xattr operations") converted xattr operations to use on-stack erofs_buf instances. erofs_init_inode_xattrs() uses such a metabuf while reading the inline xattr header and shared xattr id array. Some error paths after erofs_read_metabuf() leave through out_unlock without dropping the metabuf, so the folio reference can leak. Consolidate the cleanup at out_unlock. erofs_put_metabuf() is a no-op if no folio has been acquired, and this keeps all paths after taking EROFS_I_BL_XATTR_BIT covered by a single cleanup site.

Package Linux Kernel

Published 2026-07-19

Last modified 2026-08-17

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-401

CVE-2026-64146 is a Memory Leak vulnerability

What is Memory Leak?

The product does not release memory after use, causing gradual resource exhaustion. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.17 and later are affected. Fixed in 7.0.11, 7.1 and their respective stable series.

Affected from

≥ 5.17

Fixed in

✓ 7.0.11 7.0.x ✓ 7.1

References

2 total

Kernel Git
https://git.kernel.org/stable/c/492c73b21fefa36f3869cb2b188ffb7fe37b3a9b

Patch
Kernel Git
https://git.kernel.org/stable/c/79b09c54c6563df9846ca3094bcfd72082c3e1d7

Patch

Details

CVE ID CVE-2026-64146

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-07-19

Modified 2026-08-17

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-64146?

CVE-2026-64146 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a Memory Leak flaw (CWE-401) . It affects Linux kernel versions from 5.17 onward and has been patched in 7.0.11 and 7.1. CVE-2026-64146 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-64146?

CVE-2026-64146 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-64146?

Yes. CVE-2026-64146 has been patched. Fixed versions include 7.0.11 and 7.1. If you are running Linux kernel 5.17 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-64146 actively exploited?

No. CVE-2026-64146 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.