What is CVE-2026-64157?

CVE-2026-64157 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.10.8 onward and patched in 6.12.92, 6.18.34, 7.0.11 and others. CVE-2026-64157 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64157?

CVE-2026-64157 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-2026-64157?

Yes, CVE-2026-64157 has been patched. Fixed versions include 6.12.92, 6.18.34, 7.0.11 and others. If you are running Linux kernel 6.10.8 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64157 actively exploited?

CVE-2026-64157 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-64157

Medium

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix partial invalidation of streaming-write folio In netfs_invalidate_folio(), if the region of a partial invalidation overlaps the front (but not all) of a dirty write cached in a streaming write page (dirty, but not uptodate, with the dirty region tracked by a netfs_folio struct), the function modifies the dirty region - but incorrectly as it moves the region forward by setting the start to the start, not the end, of the invalidation region. Fix this by setting finfo->dirty_offset to the end of the invalidation region (iend).

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

Affected versions

Linux kernel versions 6.10.8, 6.11 and later are affected. Fixed in 6.12.92, 6.18.34, 7.0.11, 7.1 and their respective stable series.

Affected from

≥ 6.10.8 ≥ 6.11

Fixed in

✓ 6.12.92 6.12.x ✓ 6.18.34 6.18.x ✓ 7.0.11 7.0.x ✓ 7.1

References

4 total

Kernel Git
https://git.kernel.org/stable/c/3d9601c029b934b5b6a10f99791467b10eb6b211

Patch
Kernel Git
https://git.kernel.org/stable/c/6a3d27116be2c5fb9a03d5cf37c486ac517f3689

Patch
Kernel Git
https://git.kernel.org/stable/c/6d91acc7fb85d33ea58fca9b964a32a453937f4b

Patch
Kernel Git
https://git.kernel.org/stable/c/f6b2569ae29b666fd15ff2848684c445ba442a39

Patch

Details

CVE ID CVE-2026-64157

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-2026-64157?

CVE-2026-64157 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.10.8 onward and has been patched in 6.12.92, 6.18.34, 7.0.11 and others. CVE-2026-64157 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-64157?

CVE-2026-64157 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-2026-64157?

Yes. CVE-2026-64157 has been patched. Fixed versions include 6.12.92, 6.18.34, 7.0.11 and others. If you are running Linux kernel 6.10.8 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-64157 actively exploited?

No. CVE-2026-64157 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.