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CVE-2026-31510

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix null-ptr-deref on l2cap_sock_ready_cb Before using sk pointer, check if it is null.

Published Apr 22, 2026CWE-476EPSS 0.16%

Overview

CVE-2026-31510 is a medium-severity vulnerability. It was published on April 22, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: L2CAP: Fix null-ptr-deref on l2cap_sock_ready_cb

Before using sk pointer, check if it is null.

Fix the following:

KASAN: null-ptr-deref in range [0x0000000000000260-0x0000000000000267]

CPU: 0 UID: 0 PID: 5985 Comm: kworker/0:5 Not tainted 7.0.0-rc4-00029-ga989fde763f4 #1 PREEMPT(full)

Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.17.0-9.fc43 06/10/2025

Workqueue: events l2cap_info_timeout

RIP: 0010:kasan_byte_accessible+0x12/0x30

Code: 79 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 c3 cc cce

veth0_macvtap: entered promiscuous mode

RSP: 0018:ffffc90006e0f808 EFLAGS: 00010202

RAX: dffffc0000000000 RBX: ffffffff89746018 RCX: 0000000080000001

RDX: 0000000000000000 RSI: ffffffff89746018 RDI: 000000000000004c

RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000

R10:

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/03d4eafb0f3788239df63575951f6b4c97bbfda4Refgit.kernel.org/stable/c/0780f9333852971ca77d110019e3a66ce5a7b100Refgit.kernel.org/stable/c/1dc6db047919ecd59493cd51248b37381bbabcbbRefgit.kernel.org/stable/c/3c821bc0fbeaa27910a20d0b43c6008d099792afRefgit.kernel.org/stable/c/898b89c90ff9496e64b9331040778cc4e1b28c9dRefgit.kernel.org/stable/c/a04a760c06bb591989db659439efdf106f0bae76Refgit.kernel.org/stable/c/b6552e0503973daf6f23bd6ed9273ef131ee364fRefgit.kernel.org/stable/c/d34776c7fa1f2c510f1cdd14823aba701babb4ad

How CyberStrike helps

Frequently asked questions

What is CVE-2026-31510?

CVE-2026-31510 is a medium-severity vulnerability. It was published on April 22, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-31510?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-31510?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-31510?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-31510 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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