What is CVE-2026-52966?

CVE-2026-52966 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.18.32 onward and patched in 6.18.33 and 7.0.10. CVE-2026-52966 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-52966?

CVE-2026-52966 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-52966?

Yes, CVE-2026-52966 has been patched. Fixed versions include 6.18.33 and 7.0.10. If you are running Linux kernel 6.18.32 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-52966 actively exploited?

CVE-2026-52966 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-52966

Medium

In the Linux kernel, the following vulnerability has been resolved: drm: Replace old pointer to new idr Commit 5e28b7b94408 introduced a logical error by failing to replace the newly generated IDR pointer to old id's pointer at the correct location within the "change handle" logic; this resulted in the issue reported by syzbot [1]. Specifically, the new IDR object pointer is intended to replace the original id's pointer during the normal execution flow. Additionally, an unnecessary conditional check for the ret exit path has been removed. [1] !RB_EMPTY_ROOT(&prime_fpriv->dmabufs) WARNING: drivers/gpu/drm/drm_prime.c:224 at drm_prime_destroy_file_private+0x48/0x60 drivers/gpu/drm/drm_prime.c:224, CPU#0: syz.0.17/5833 Call Trace: drm_file_free.part.0+0x7e6/0xcc0 drivers/gpu/drm/drm_file.c:269 drm_file_free drivers/gpu/drm/drm_file.c:237 [inline] drm_close_helper.isra.0+0x186/0x200 drivers/gpu/drm/drm_file.c:290 drm_release+0x1ab/0x360 drivers/gpu/drm/drm_file.c:438

Package Linux Kernel

Published 2026-06-24

Last modified 2026-07-14

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Affected versions

Linux kernel versions 6.18.32, 7.0.9 and later are affected. Fixed in 6.18.33, 7.0.10 and their respective stable series.

Affected from

≥ 6.18.32 ≥ 7.0.9

Fixed in

✓ 6.18.33 6.18.x ✓ 7.0.10 7.0.x

References

3 total

Kernel Git
https://git.kernel.org/stable/c/318b995cffcfcaa69a234d28123a3f4ae186a9df

Patch
Kernel Git
https://git.kernel.org/stable/c/38f12d0e10d83b66fa1466400d876a3a8da31542

Patch
Kernel Git
https://git.kernel.org/stable/c/dc366607c41c45fd0ae6f3db090f31dd611b644a

Patch

Details

CVE ID CVE-2026-52966

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-06-24

Modified 2026-07-14

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-52966?

CVE-2026-52966 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.18.32 onward and has been patched in 6.18.33 and 7.0.10. CVE-2026-52966 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-52966?

CVE-2026-52966 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-52966?

Yes. CVE-2026-52966 has been patched. Fixed versions include 6.18.33 and 7.0.10. If you are running Linux kernel 6.18.32 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-52966 actively exploited?

No. CVE-2026-52966 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.