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CVE-2025-71291

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: misc: bcm_vk: Fix possible null-pointer dereferences in bcm_vk_read() In the function bcm_vk_read(), the pointer entry is check…

Published May 6, 2026CWE-476EPSS 0.12%

Overview

CVE-2025-71291 is a medium-severity vulnerability. It was published on May 6, 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:

misc: bcm_vk: Fix possible null-pointer dereferences in bcm_vk_read()

In the function bcm_vk_read(), the pointer entry is checked, indicating

that it can be NULL. If entry is NULL and rc is set to -EMSGSIZE, the

following code may cause null-pointer dereferences:

struct vk_msg_blk tmp_msg = entry->to_h_msg[0];

set_msg_id(&tmp_msg, entry->usr_msg_id);

tmp_msg.size = entry->to_h_blks - 1;

To prevent these possible null-pointer dereferences, copy to_h_msg,

usr_msg_id, and to_h_blks from iter into temporary variables, and return

these temporary variables to the application instead of accessing them

through a potentially NULL entry.

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/20f2d9dbe5e972516f8f9948d7ae5b95d1ad77bdRefgit.kernel.org/stable/c/3842f93e6e29d5cc1dcb9e5bda70587b444bed69Refgit.kernel.org/stable/c/741c5a3a0cd893a4218fc0fc8c18403e54fcfb22Refgit.kernel.org/stable/c/aa97ccc3dc1eba9f4537f0410e9dbb0b05ccf2fbRefgit.kernel.org/stable/c/ba75ecb97d3f4e95d59002c13afb6519205be6cbRefgit.kernel.org/stable/c/ece3722169ba93734bfd1f06255e8ab7f19fe964

How CyberStrike helps

Frequently asked questions

What is CVE-2025-71291?

CVE-2025-71291 is a medium-severity vulnerability. It was published on May 6, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-71291?

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-2025-71291?

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-2025-71291?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-71291 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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