What is CVE-2026-52908?

CVE-2026-52908 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 6.2 onward and patched in 6.6.143, 6.12.94, 6.18.36 and others. CVE-2026-52908 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-52908?

CVE-2026-52908 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-52908?

Yes, CVE-2026-52908 has been patched. Fixed versions include 6.6.143, 6.12.94, 6.18.36 and others. If you are running Linux kernel 6.2 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-52908 actively exploited?

CVE-2026-52908 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-52908

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 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.

Package Linux Kernel

Published 2026-06-19

Last modified 2026-07-08

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected versions

Linux kernel versions 6.2 and later are affected. Fixed in 6.6.143, 6.12.94, 6.18.36, 7.0.13, 7.1 and their respective stable series.

Affected from

≥ 6.2

Fixed in

✓ 6.6.143 6.6.x ✓ 6.12.94 6.12.x ✓ 6.18.36 6.18.x ✓ 7.0.13 7.0.x ✓ 7.1

References

5 total

Kernel Git
https://git.kernel.org/stable/c/09dc18894148381d3bfc550083b1236043870dce

Patch
Kernel Git
https://git.kernel.org/stable/c/2904e985a2917b5dac65df82733065e78a65fc9d

Patch
Kernel Git
https://git.kernel.org/stable/c/50334a05a950840b39a1ce3d2a173b4183db9b3e

Patch
Kernel Git
https://git.kernel.org/stable/c/badad6fad60def1b9805559dd81dbab3d97b82aa

Patch
Kernel Git
https://git.kernel.org/stable/c/eba5df21eda0fe7418efbea2f799f8ea1b8ca94c

Patch

Details

CVE ID CVE-2026-52908

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-06-19

Modified 2026-07-08

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-52908?

CVE-2026-52908 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 6.2 onward and has been patched in 6.6.143, 6.12.94, 6.18.36 and others. CVE-2026-52908 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-52908?

CVE-2026-52908 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-52908?

Yes. CVE-2026-52908 has been patched. Fixed versions include 6.6.143, 6.12.94, 6.18.36 and others. If you are running Linux kernel 6.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-52908 actively exploited?

No. CVE-2026-52908 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.