What is CVE-2026-64345?

CVE-2026-64345 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 4.4.241 onward and patched in 5.10.261, 6.6.145, 6.12.96 and others. CVE-2026-64345 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64345?

CVE-2026-64345 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-2026-64345?

Yes, CVE-2026-64345 has been patched. Fixed versions include 5.10.261, 6.6.145, 6.12.96 and others. If you are running Linux kernel 4.4.241 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64345 actively exploited?

CVE-2026-64345 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-64345

Medium

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_printer: take kref only for successful open printer_open() returns -EBUSY when the character device is already open, but it increments dev->kref regardless of the return value. VFS does not call ->release() for a failed open, so every rejected second open permanently leaks one reference. Move kref_get() into the successful-open branch.

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 4.4.241, 4.9.241, 4.14.203, 4.19.154, 5.4.73, 5.8.17, 5.9.2, 5.10 and later are affected. Fixed in 5.10.261, 6.6.145, 6.12.96, 6.18.39, 7.1.4, 7.2 and their respective stable series.

Affected from

≥ 4.4.241 ≥ 4.9.241 ≥ 4.14.203 ≥ 4.19.154 ≥ 5.4.73 ≥ 5.8.17 ≥ 5.9.2 ≥ 5.10

Fixed in

✓ 5.10.261 5.10.x ✓ 6.6.145 6.6.x ✓ 6.12.96 6.12.x ✓ 6.18.39 6.18.x ✓ 7.1.4 7.1.x ✓ 7.2

References

6 total

Kernel Git
https://git.kernel.org/stable/c/30adce93d5c4a5a1ec29d9249e3fdfcc391d406b

Patch
Kernel Git
https://git.kernel.org/stable/c/75c0ad13e136961328253742501b4efc3988a587

Patch
Kernel Git
https://git.kernel.org/stable/c/7f1f24c367938c5537e2308bf9a965f051d14774

Patch
Kernel Git
https://git.kernel.org/stable/c/8a5eba992c862b0c94411eecf9b7121e8636db38

Patch
Kernel Git
https://git.kernel.org/stable/c/94ec20d97aa51547965a539f660a1fe79c6929a3

Patch

Showing 5 of 6 references View all on NVD

Details

CVE ID CVE-2026-64345

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-2026-64345?

CVE-2026-64345 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 4.4.241 onward and has been patched in 5.10.261, 6.6.145, 6.12.96 and others. CVE-2026-64345 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-64345?

CVE-2026-64345 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-2026-64345?

Yes. CVE-2026-64345 has been patched. Fixed versions include 5.10.261, 6.6.145, 6.12.96 and others. If you are running Linux kernel 4.4.241 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-64345 actively exploited?

No. CVE-2026-64345 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.