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CVE-2026-31512

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Validate PDU length before reading SDU length in l2cap_ecred_data_rcv() l2cap_ecred_data_rcv() reads the SDU…

Published Apr 22, 2026EPSS 0.16%

Overview

CVE-2026-31512 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: Validate PDU length before reading SDU length in l2cap_ecred_data_rcv()

l2cap_ecred_data_rcv() reads the SDU length field from skb->data using

get_unaligned_le16() without first verifying that skb contains at least

L2CAP_SDULEN_SIZE (2) bytes. When skb->len is less than 2, this reads

past the valid data in the skb.

The ERTM reassembly path correctly calls pskb_may_pull() before reading

the SDU length (l2cap_reassemble_sdu, L2CAP_SAR_START case). Apply the

same validation to the Enhanced Credit Based Flow Control data path.

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/3340be2bafdcc806f048273ea6d8e82a6597aa1bRefgit.kernel.org/stable/c/40c7f7eea2f4d9cb0b3e924254c8c9053372168fRefgit.kernel.org/stable/c/477ad4976072056c348937e94f24583321938df4Refgit.kernel.org/stable/c/5ad981249be52f5e4e92e0e97b436b569071cb86Refgit.kernel.org/stable/c/8c96f3bd4ae0802db90630be8e9851827e9c9209Refgit.kernel.org/stable/c/c65bd945d1c08c3db756821b6bf9f1c4a77b29c6Refgit.kernel.org/stable/c/cef09691cfb61f6c91cc27c3d69634f81c8ab949Refgit.kernel.org/stable/c/e47315b84d0eb188772c3ff5cf073cdbdefca6b4

How CyberStrike helps

Frequently asked questions

What is CVE-2026-31512?

CVE-2026-31512 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-2026-31512?

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-2026-31512?

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-2026-31512?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-31512 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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