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CVE-2026-52930

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: ipc/shm: serialize orphan cleanup with shm_nattch updates shm_destroy_orphaned() walks the shm idr under shm_ids(ns).rwsem, but…

Published Jun 24, 2026EPSS 0.12%

Overview

CVE-2026-52930 is a medium-severity vulnerability. It was published on June 24, 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:

ipc/shm: serialize orphan cleanup with shm_nattch updates

shm_destroy_orphaned() walks the shm idr under shm_ids(ns).rwsem, but that

does not serialize all fields tested by shm_may_destroy(). In particular,

shm_nattch is updated while holding shm_perm.lock, and attach paths can do

that without holding the rwsem.

Do not decide that an orphaned segment is unused before taking the object

lock. Move the shm_may_destroy() check under shm_perm.lock, matching the

other destroy paths, and unlock the segment when it no longer qualifies

for removal.

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/030bbc857bd51d4b25a90d931d3f8775ef22823aRefgit.kernel.org/stable/c/1f0d01e35dbb228084d5187212e32c91a30dcbebRefgit.kernel.org/stable/c/2e5c6f4fd4001562781e99bbfc7f1f0127187542Refgit.kernel.org/stable/c/6560be3f6a5bb84f006f184f0c966747bb58e1a3Refgit.kernel.org/stable/c/92cda2593cf2ed25b0e9d78e5e6d8303bba1a064Refgit.kernel.org/stable/c/b1e9aef48e4d8a0c1b54fb913077b0824ed7d650Refgit.kernel.org/stable/c/b5107b4ce3ad45fcf369ee2058c8910620f4b5a8Refgit.kernel.org/stable/c/db752ebfdaf2c7f27cd9690ef48b616af068319c

How CyberStrike helps

Frequently asked questions

What is CVE-2026-52930?

CVE-2026-52930 is a medium-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-52930?

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-2026-52930?

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-2026-52930?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-52930 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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