What is CVE-2026-53048?

CVE-2026-53048 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476), affecting Linux kernel versions from 5.15.200 onward and patched in 5.15.209, 6.1.175, 6.6.141 and others. CVE-2026-53048 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-53048?

CVE-2026-53048 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-2026-53048?

Yes, CVE-2026-53048 has been patched. Fixed versions include 5.15.209, 6.1.175, 6.6.141 and others. If you are running Linux kernel 5.15.200 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-53048 actively exploited?

CVE-2026-53048 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2026-53048

Medium

In the Linux kernel, the following vulnerability has been resolved: gfs2: prevent NULL pointer dereference during unmount When flushing out outstanding glock work during an unmount, gfs2_log_flush() can be called when sdp->sd_jdesc has already been deallocated and sdp->sd_jdesc is NULL. Commit 35264909e9d1 ("gfs2: Fix NULL pointer dereference in gfs2_log_flush") added a check for that to gfs2_log_flush() itself, but it missed the sdp->sd_jdesc dereference in gfs2_log_release(). Fix that.

Package Linux Kernel

Published 2026-06-24

Last modified 2026-07-21

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

Weakness type

CWE-476

CVE-2026-53048 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.15.200, 6.1.162, 6.6.37, 6.9.8, 6.10 and later are affected. Fixed in 5.15.209, 6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10, 7.1 and their respective stable series.

Affected from

≥ 5.15.200 ≥ 6.1.162 ≥ 6.6.37 ≥ 6.9.8 ≥ 6.10

Fixed in

✓ 5.15.209 5.15.x ✓ 6.1.175 6.1.x ✓ 6.6.141 6.6.x ✓ 6.12.91 6.12.x ✓ 6.18.33 6.18.x ✓ 7.0.10 7.0.x ✓ 7.1

References

7 total

Kernel Git
https://git.kernel.org/stable/c/233a0945a4b1dbe3f38c30afb7d05b76c67f1193

Patch
Kernel Git
https://git.kernel.org/stable/c/2fc4c868c9060f424fd4a7cacb0aec5082aba4de

Patch
Kernel Git
https://git.kernel.org/stable/c/74b4dbb946060a3233604d91859a9abd3708141d

Patch
Kernel Git
https://git.kernel.org/stable/c/abd73229f0e886a91a16ea781ab656bd9b4d1ee8

Patch
Kernel Git
https://git.kernel.org/stable/c/cec55674354794eddb80b914f73a6bf9b7fc304a

Patch

Showing 5 of 7 references View all on NVD

Details

CVE ID CVE-2026-53048

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-06-24

Modified 2026-07-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-53048?

CVE-2026-53048 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 5.15.200 onward and has been patched in 5.15.209, 6.1.175, 6.6.141 and others. CVE-2026-53048 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-53048?

CVE-2026-53048 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-2026-53048?

Yes. CVE-2026-53048 has been patched. Fixed versions include 5.15.209, 6.1.175, 6.6.141 and others. If you are running Linux kernel 5.15.200 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-53048 actively exploited?

No. CVE-2026-53048 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.