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CVE-2026-52908

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: RDMA: During rereg_mr ensure that REREG_ACCESS is compatible If IB_MR_REREG_ACCESS changes from RO to RW then the umem has to b…

Published Jun 19, 2026EPSS 0.13%

Overview

CVE-2026-52908 is a high-severity vulnerability. It was published on June 19, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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:

RDMA: During rereg_mr ensure that REREG_ACCESS is compatible

If IB_MR_REREG_ACCESS changes from RO to RW then the umem has to be

re-evaluated to ensure it is properly pinned as RW. Since the umem is

hidden inside each driver's mr struct add a ib_umem_check_rereg() function

that each driver has to call before processing IB_MR_REREG_ACCESS.

mlx4 has to retain its duplicate ib_access_writable check because it

implements IB_MR_REREG_ACCESS | IB_MR_REREG_TRANS by changing both items

in place sequentially while the MR is live, so it will continue to not

support this combination.

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/09dc18894148381d3bfc550083b1236043870dceRefgit.kernel.org/stable/c/2904e985a2917b5dac65df82733065e78a65fc9dRefgit.kernel.org/stable/c/50334a05a950840b39a1ce3d2a173b4183db9b3eRefgit.kernel.org/stable/c/badad6fad60def1b9805559dd81dbab3d97b82aaRefgit.kernel.org/stable/c/eba5df21eda0fe7418efbea2f799f8ea1b8ca94c

How CyberStrike helps

Frequently asked questions

What is CVE-2026-52908?

CVE-2026-52908 is a high-severity vulnerability. It was published on June 19, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-52908?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-52908?

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-2026-52908?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-52908 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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