What is CVE-2026-64353?

CVE-2026-64353 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.14 onward and patched in 6.18.40, 7.1.4 and 7.2. CVE-2026-64353 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64353?

CVE-2026-64353 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-2026-64353?

Yes, CVE-2026-64353 has been patched. Fixed versions include 6.18.40, 7.1.4 and 7.2. If you are running Linux kernel 6.14 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64353 actively exploited?

CVE-2026-64353 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-64353

Medium

In the Linux kernel, the following vulnerability has been resolved: bpf: Keep dynamic inner array lookups nullable An ARRAY_OF_MAPS can use an array created with BPF_F_INNER_MAP as its inner map template. A concrete inner array with a different max_entries value can then replace the template. After a successful outer map lookup, the verifier represents the resulting map pointer using the inner map template. Const-key lookup nullness elision consequently uses the template max_entries even though the runtime helper uses the concrete inner map max_entries. Do not elide lookup result nullness for maps marked with BPF_F_INNER_MAP, because the template max_entries does not prove that the key is in bounds for the concrete runtime map.

Package Linux Kernel

Published 2026-07-25

Last modified 2026-09-03

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 6.14 and later are affected. Fixed in 6.18.40, 7.1.4, 7.2 and their respective stable series.

Affected from

≥ 6.14

Fixed in

✓ 6.18.40 6.18.x ✓ 7.1.4 7.1.x ✓ 7.2

References

3 total

Kernel Git
https://git.kernel.org/stable/c/0b92ad64d6e4bde85e6b9888404f9a7a2b65d269

Patch
Kernel Git
https://git.kernel.org/stable/c/53040a81ae57cdca8af8ac36fe4e661730cf7c6b

Patch
Kernel Git
https://git.kernel.org/stable/c/d57db0d975053e01410c54e708a85b6d32ef2ebd

Patch

Details

CVE ID CVE-2026-64353

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-07-25

Modified 2026-09-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-64353?

CVE-2026-64353 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.14 onward and has been patched in 6.18.40, 7.1.4 and 7.2. CVE-2026-64353 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-64353?

CVE-2026-64353 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-2026-64353?

Yes. CVE-2026-64353 has been patched. Fixed versions include 6.18.40, 7.1.4 and 7.2. If you are running Linux kernel 6.14 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-64353 actively exploited?

No. CVE-2026-64353 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.