What is CVE-2026-45836?

CVE-2026-45836 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 3.13 onward and patched in 5.10.258, 5.15.209, 6.1.175 and others. CVE-2026-45836 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-45836?

CVE-2026-45836 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-2026-45836?

Yes, CVE-2026-45836 has been patched. Fixed versions include 5.10.258, 5.15.209, 6.1.175 and others. If you are running Linux kernel 3.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-45836 actively exploited?

CVE-2026-45836 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-2026-45836

Medium

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndtimeo_cb() Add the same NULL guard already present in l2cap_sock_resume_cb() and l2cap_sock_ready_cb().

Package Linux Kernel

Published 2026-05-26

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-2026-45836 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 3.13 and later are affected. Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.90, 6.18.30, 7.0.7, 7.1 and their respective stable series.

Affected from

≥ 3.13

Fixed in

✓ 5.10.258 5.10.x ✓ 5.15.209 5.15.x ✓ 6.1.175 6.1.x ✓ 6.6.140 6.6.x ✓ 6.12.90 6.12.x ✓ 6.18.30 6.18.x ✓ 7.0.7 7.0.x ✓ 7.1

References

8 total

Kernel Git
https://git.kernel.org/stable/c/32bd343803d4ba47cc516f9d5f037f01b855d767

Patch
Kernel Git
https://git.kernel.org/stable/c/58dc5e3d8768e121907608e6e196a908512fb083

Patch
Kernel Git
https://git.kernel.org/stable/c/6e8d1a2a677a81caa60cf0aabd4217bd585fbba1

Patch
Kernel Git
https://git.kernel.org/stable/c/78a88d43dab8d23aeef934ed8ce34d40e6b3d613

Patch
Kernel Git
https://git.kernel.org/stable/c/a93d66907dd4d29b65c9797a93784bf61906d6d6

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2026-45836

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-05-26

Modified 2026-07-24

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-45836?

CVE-2026-45836 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 3.13 onward and has been patched in 5.10.258, 5.15.209, 6.1.175 and others. CVE-2026-45836 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-45836?

CVE-2026-45836 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-2026-45836?

Yes. CVE-2026-45836 has been patched. Fixed versions include 5.10.258, 5.15.209, 6.1.175 and others. If you are running Linux kernel 3.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-45836 actively exploited?

No. CVE-2026-45836 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.