What is CVE-2026-23445?

CVE-2026-23445 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 6.10 onward and patched in 6.12.78, 6.18.20, 6.19.10 and others. CVE-2026-23445 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-23445?

CVE-2026-23445 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-2026-23445?

Yes, CVE-2026-23445 has been patched. Fixed versions include 6.12.78, 6.18.20, 6.19.10 and others. If you are running Linux kernel 6.10 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-23445 actively exploited?

CVE-2026-23445 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2026-23445

Medium

In the Linux kernel, the following vulnerability has been resolved: igc: fix page fault in XDP TX timestamps handling If an XDP application that requested TX timestamping is shutting down while the link of the interface in use is still up the following kernel splat is reported: [ 883.803618] [ T1554] BUG: unable to handle page fault for address: ffffcfb6200fd008 ... [ 883.803650] [ T1554] Call Trace: [ 883.803652] [ T1554] <TASK> [ 883.803654] [ T1554] igc_ptp_tx_tstamp_event+0xdf/0x160 [igc] [ 883.803660] [ T1554] igc_tsync_interrupt+0x2d5/0x300 [igc] ... During shutdown of the TX ring the xsk_meta pointers are left behind, so that the IRQ handler is trying to touch them. This issue is now being fixed by cleaning up the stale xsk meta data on TX shutdown. TX timestamps on other queues remain unaffected.

Package Linux Kernel

Published 2026-04-03

Last modified 2026-10-19

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

Weakness type

CWE-416

CVE-2026-23445 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.10 and later are affected. Fixed in 6.12.78, 6.18.20, 6.19.10, 7.0 and their respective stable series.

Affected from

≥ 6.10

Fixed in

✓ 6.12.78 6.12.x ✓ 6.18.20 6.18.x ✓ 6.19.10 6.19.x ✓ 7.0

References

4 total

Kernel Git
https://git.kernel.org/stable/c/31521c124e6488c4a81658e35199feb75a988d86

Patch
Kernel Git
https://git.kernel.org/stable/c/45b33e805bd39f615d9353a7194b2da5281332df

Patch
Kernel Git
https://git.kernel.org/stable/c/5e4c90c94eb766d70e30694b7fe66862aabaf24b

Patch
Kernel Git
https://git.kernel.org/stable/c/b02fa17d1744d19cd3820bdbf6ec5d85547977bf

Patch

Details

CVE ID CVE-2026-23445

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-04-03

Modified 2026-10-19

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-23445?

CVE-2026-23445 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 6.10 onward and has been patched in 6.12.78, 6.18.20, 6.19.10 and others. CVE-2026-23445 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-23445?

CVE-2026-23445 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-2026-23445?

Yes. CVE-2026-23445 has been patched. Fixed versions include 6.12.78, 6.18.20, 6.19.10 and others. If you are running Linux kernel 6.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-23445 actively exploited?

No. CVE-2026-23445 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.