What is CVE-2026-23007?

CVE-2026-23007 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.11 onward and patched in 6.18.7 and 6.19. CVE-2026-23007 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-23007?

CVE-2026-23007 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-2026-23007?

Yes, CVE-2026-23007 has been patched. Fixed versions include 6.18.7 and 6.19. If you are running Linux kernel 6.11 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-23007 actively exploited?

CVE-2026-23007 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-23007

Medium

In the Linux kernel, the following vulnerability has been resolved: block: zero non-PI portion of auto integrity buffer The auto-generated integrity buffer for writes needs to be fully initialized before being passed to the underlying block device, otherwise the uninitialized memory can be read back by userspace or anyone with physical access to the storage device. If protection information is generated, that portion of the integrity buffer is already initialized. The integrity data is also zeroed if PI generation is disabled via sysfs or the PI tuple size is 0. However, this misses the case where PI is generated and the PI tuple size is nonzero, but the metadata size is larger than the PI tuple. In this case, the remainder ("opaque") of the metadata is left uninitialized. Generalize the BLK_INTEGRITY_CSUM_NONE check to cover any case when the metadata is larger than just the PI tuple.

Package Linux Kernel

Published 2026-01-25

Last modified 2026-03-25

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-908

CVE-2026-23007 is classified as CWE-908

See CWE-908 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 6.11 and later are affected. Fixed in 6.18.7, 6.19 and their respective stable series.

Affected from

≥ 6.11

Fixed in

✓ 6.18.7 6.18.x ✓ 6.19

References

The following references provide additional information about CVE-2026-23007 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/ca22c566b89164f6e670af56ecc45f47ef3df819
Patch
Kernel patch commit
https://git.kernel.org/stable/c/d6072557b90e0c557df319a56f4a9dc482706d2c
Patch

Details

CVE ID CVE-2026-23007

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-01-25

Modified 2026-03-25

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-23007?

CVE-2026-23007 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.11 onward and has been patched in 6.18.7 and 6.19. CVE-2026-23007 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-23007?

CVE-2026-23007 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-2026-23007?

Yes — CVE-2026-23007 has been patched. Fixed versions include 6.18.7 and 6.19. If you are running Linux kernel 6.11 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-23007 actively exploited?

No — CVE-2026-23007 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.