What is CVE-2026-64375?

CVE-2026-64375 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 2.6.18 onward and patched in 5.10.261, 5.15.212, 6.1.178 and others. CVE-2026-64375 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64375?

CVE-2026-64375 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-2026-64375?

Yes, CVE-2026-64375 has been patched. Fixed versions include 5.10.261, 5.15.212, 6.1.178 and others. If you are running Linux kernel 2.6.18 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64375 actively exploited?

CVE-2026-64375 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-64375

High

In the Linux kernel, the following vulnerability has been resolved: proc: protect ptrace_may_access() with exec_update_lock (FD links) proc_pid_get_link() and proc_pid_readlink() currently look up the task from the pid once, then do the ptrace access check on that task, then look up the task from the pid a second time to do the actual access. That's racy in several ways. To fix it, pass the task to the ->proc_get_link() handler, and instead of proc_fd_access_allowed(), introduce a new helper call_proc_get_link() that looks up and locks the task, does the access check, and calls ->proc_get_link().

Package Linux Kernel

Published 2026-07-25

Last modified 2026-09-08

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 2.6.18 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

≥ 2.6.18

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/138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2

Patch
Kernel Git
https://git.kernel.org/stable/c/497c6bae5167428596575f20af6613ff5671f383

Patch
Kernel Git
https://git.kernel.org/stable/c/6253dfee5afba536bb54fc6fe6c091c3758fafe1

Patch
Kernel Git
https://git.kernel.org/stable/c/6255da28d4bb5349fe18e84cb043ccd394eba75d

Patch
Kernel Git
https://git.kernel.org/stable/c/65bf0d2b6e914f1448d6a2fde193dcf60936a651

Patch

Showing 5 of 9 references View all on NVD

Details

CVE ID CVE-2026-64375

Severity High

CVSS score 7.8 / 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-2026-64375?

CVE-2026-64375 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 2.6.18 onward and has been patched in 5.10.261, 5.15.212, 6.1.178 and others. CVE-2026-64375 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-64375?

CVE-2026-64375 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-2026-64375?

Yes. CVE-2026-64375 has been patched. Fixed versions include 5.10.261, 5.15.212, 6.1.178 and others. If you are running Linux kernel 2.6.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-64375 actively exploited?

No. CVE-2026-64375 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.