What is CVE-2026-64371?

CVE-2026-64371 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 2.6.27.23 onward and patched in 5.10.261, 5.15.212, 6.1.178 and others. CVE-2026-64371 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64371?

CVE-2026-64371 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-2026-64371?

Yes, CVE-2026-64371 has been patched. Fixed versions include 5.10.261, 5.15.212, 6.1.178 and others. If you are running Linux kernel 2.6.27.23 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64371 actively exploited?

CVE-2026-64371 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-64371

Medium

In the Linux kernel, the following vulnerability has been resolved: proc: protect ptrace_may_access() with exec_update_lock (part 1) Fix the easy cases where procfs currently calls ptrace_may_access() without exec_update_lock protection, where the fix is to simply add the extra lock or use mm_access(): - do_task_stat(): grab exec_update_lock - proc_pid_wchan(): grab exec_update_lock - proc_map_files_lookup(): use mm_access() instead of get_task_mm() - proc_map_files_readdir(): use mm_access() instead of get_task_mm() - proc_ns_get_link(): grab exec_update_lock - proc_ns_readlink(): grab exec_update_lock

Package Linux Kernel

Published 2026-07-25

Last modified 2026-09-08

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 2.6.27.23, 2.6.29.3, 2.6.30 and later are affected. Fixed in 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.4, 7.2 and their respective stable series.

Affected from

≥ 2.6.27.23 ≥ 2.6.29.3 ≥ 2.6.30

Fixed in

✓ 5.10.261 5.10.x ✓ 5.15.212 5.15.x ✓ 6.1.178 6.1.x ✓ 6.6.145 6.6.x ✓ 6.12.97 6.12.x ✓ 6.18.40 6.18.x ✓ 7.1.4 7.1.x ✓ 7.2

References

9 total

Kernel Git
https://git.kernel.org/stable/c/4bfe8c481846cee52473a2f7d7b30ee8e6749fc4

Patch
Kernel Git
https://git.kernel.org/stable/c/6650527444dadc63d84aa939d14ecba4fadb2f69

Patch
Kernel Git
https://git.kernel.org/stable/c/7456ae990a9738962b33146916fabca62ae3d4e0

Patch
Kernel Git
https://git.kernel.org/stable/c/ae1e630bcaac739f625822078edbaea98366930d

Patch
Kernel Git
https://git.kernel.org/stable/c/bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9

Patch

Showing 5 of 9 references View all on NVD

Details

CVE ID CVE-2026-64371

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-07-25

Modified 2026-09-08

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-64371?

CVE-2026-64371 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 2.6.27.23 onward and has been patched in 5.10.261, 5.15.212, 6.1.178 and others. CVE-2026-64371 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-64371?

CVE-2026-64371 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-2026-64371?

Yes. CVE-2026-64371 has been patched. Fixed versions include 5.10.261, 5.15.212, 6.1.178 and others. If you are running Linux kernel 2.6.27.23 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-64371 actively exploited?

No. CVE-2026-64371 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.