What is CVE-2026-23442?

CVE-2026-23442 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476), affecting Linux kernel versions from 4.10 onward and patched in 5.10.258, 5.15.209, 6.1.175 and others. CVE-2026-23442 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-23442?

CVE-2026-23442 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-2026-23442?

Yes, CVE-2026-23442 has been patched. Fixed versions include 5.10.258, 5.15.209, 6.1.175 and others. If you are running Linux kernel 4.10 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-23442 actively exploited?

CVE-2026-23442 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2026-23442

Medium

In the Linux kernel, the following vulnerability has been resolved: ipv6: add NULL checks for idev in SRv6 paths __in6_dev_get() can return NULL when the device has no IPv6 configuration (e.g. MTU < IPV6_MIN_MTU or after NETDEV_UNREGISTER). Add NULL checks for idev returned by __in6_dev_get() in both seg6_hmac_validate_skb() and ipv6_srh_rcv() to prevent potential NULL pointer dereferences.

Package Linux Kernel

Published 2026-04-03

Last modified 2026-07-24

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-476

CVE-2026-23442 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions 4.10 and later are affected. Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.136, 6.12.83, 6.18.25, 6.19.10, 7.0 and their respective stable series.

Affected from

≥ 4.10

Fixed in

✓ 5.10.258 5.10.x ✓ 5.15.209 5.15.x ✓ 6.1.175 6.1.x ✓ 6.6.136 6.6.x ✓ 6.12.83 6.12.x ✓ 6.18.25 6.18.x ✓ 6.19.10 6.19.x ✓ 7.0

References

8 total

Kernel Git
https://git.kernel.org/stable/c/06413793526251870e20402c39930804f14d59c0

Patch
Kernel Git
https://git.kernel.org/stable/c/a25853c9feea7bbf31d157ff6e004d2d3b4f7f13

Patch
Kernel Git
https://git.kernel.org/stable/c/bc9843c39f9932a8b36efd1d362ea00bb88e4e78

Patch
Kernel Git
https://git.kernel.org/stable/c/0348fa0ada37cef7c6b5ab2a428bb2c6aee784e4
Kernel Git
https://git.kernel.org/stable/c/50352fc103928e10e8729abc79a0d05abef26c4d

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2026-23442

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-04-03

Modified 2026-07-24

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-23442?

CVE-2026-23442 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 4.10 onward and has been patched in 5.10.258, 5.15.209, 6.1.175 and others. CVE-2026-23442 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-23442?

CVE-2026-23442 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-2026-23442?

Yes. CVE-2026-23442 has been patched. Fixed versions include 5.10.258, 5.15.209, 6.1.175 and others. If you are running Linux kernel 4.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-23442 actively exploited?

No. CVE-2026-23442 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.