What is CVE-2026-64354?

CVE-2026-64354 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 6.11.6 onward and patched in 6.12.96, 6.18.39, 7.1.4 and others. CVE-2026-64354 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64354?

CVE-2026-64354 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-64354?

Yes, CVE-2026-64354 has been patched. Fixed versions include 6.12.96, 6.18.39, 7.1.4 and others. If you are running Linux kernel 6.11.6 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64354 actively exploited?

CVE-2026-64354 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-64354

High

In the Linux kernel, the following vulnerability has been resolved: bpf: Validate BTF repeated field counts before expansion btf_parse_struct_metas() walks user-supplied BTF during BPF_BTF_LOAD, and btf_repeat_fields() expands repeatable fields from array elements into the fixed BTF_FIELDS_MAX scratch array used by btf_parse_fields(). The remaining-capacity check performs the expanded field count calculation in u32. A malformed BTF can wrap that calculation, causing the check to pass even when the expanded field count exceeds the scratch array capacity. The following memcpy() can then write past the end of the array. Use checked addition and multiplication before copying repeated fields and reject impossible counts.

Package Linux Kernel

Published 2026-07-25

Last modified 2026-09-04

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 6.11.6, 6.12 and later are affected. Fixed in 6.12.96, 6.18.39, 7.1.4, 7.2 and their respective stable series.

Affected from

≥ 6.11.6 ≥ 6.12

Fixed in

✓ 6.12.96 6.12.x ✓ 6.18.39 6.18.x ✓ 7.1.4 7.1.x ✓ 7.2

References

4 total

Kernel Git
https://git.kernel.org/stable/c/b9452b594fd3aecbfd4aa0a6a1f741330a37dab7

Patch
Kernel Git
https://git.kernel.org/stable/c/c5ff816d5f13900c3f1f3298cfcc61339e056e56

Patch
Kernel Git
https://git.kernel.org/stable/c/cd407de2ef5dc70f1970b343ffaa16186340fdfd

Patch
Kernel Git
https://git.kernel.org/stable/c/ff77d013b737c0f77d925e2f2c59f0cf3d76bd35

Patch

Details

CVE ID CVE-2026-64354

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-07-25

Modified 2026-09-04

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-64354?

CVE-2026-64354 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 6.11.6 onward and has been patched in 6.12.96, 6.18.39, 7.1.4 and others. CVE-2026-64354 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-64354?

CVE-2026-64354 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-64354?

Yes. CVE-2026-64354 has been patched. Fixed versions include 6.12.96, 6.18.39, 7.1.4 and others. If you are running Linux kernel 6.11.6 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-64354 actively exploited?

No. CVE-2026-64354 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.