What is CVE-2026-43245?

CVE-2026-43245 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10, affecting Linux kernel versions from 6.2 onward and patched in 6.6.141, 6.12.91, 6.18.16 and others. CVE-2026-43245 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-43245?

CVE-2026-43245 has a CVSS score of 7.5 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-43245?

Yes, CVE-2026-43245 has been patched. Fixed versions include 6.6.141, 6.12.91, 6.18.16 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-2026-43245 actively exploited?

CVE-2026-43245 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-43245

High

In the Linux kernel, the following vulnerability has been resolved: ntfs: ->d_compare() must not block ... so don't use __getname() there. Switch it (and ntfs_d_hash(), while we are at it) to kmalloc(PATH_MAX, GFP_NOWAIT). Yes, ntfs_d_hash() almost certainly can do with smaller allocations, but let ntfs folks deal with that - keep the allocation size as-is for now. Stop abusing names_cachep in ntfs, period - various uses of that thing in there have nothing to do with pathnames; just use k[mz]alloc() and be done with that. For now let's keep sizes as-in, but AFAICS none of the users actually want PATH_MAX.

Package Linux Kernel

Published 2026-05-06

Last modified 2026-05-23

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.5

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Affected versions

Linux kernel versions 6.2 and later are affected. Fixed in 6.6.141, 6.12.91, 6.18.16, 6.19.6, 7.0 and their respective stable series.

Affected from

≥ 6.2

Fixed in

✓ 6.6.141 6.6.x ✓ 6.12.91 6.12.x ✓ 6.18.16 6.18.x ✓ 6.19.6 6.19.x ✓ 7.0

References

The following references provide additional information about CVE-2026-43245 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/02ecc0978c459fd90bb24b2a946dd16d43e68fe5
Patch
Kernel patch commit
https://git.kernel.org/stable/c/142c444a395f4d26055c8a4473e228bb86283f1e
Patch
Kernel patch commit
https://git.kernel.org/stable/c/1be7ca86ce1794d966fda5d82181bc978b150fbc
Patch

5 patch commits total View all on NVD

Details

CVE ID CVE-2026-43245

Severity High

CVSS score 7.5 / 10

CVSS version 3.1

Published 2026-05-06

Modified 2026-05-23

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-43245?

CVE-2026-43245 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10 . It affects Linux kernel versions from 6.2 onward and has been patched in 6.6.141, 6.12.91, 6.18.16 and others. CVE-2026-43245 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-43245?

CVE-2026-43245 has a CVSS score of 7.5 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-43245?

Yes — CVE-2026-43245 has been patched. Fixed versions include 6.6.141, 6.12.91, 6.18.16 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-2026-43245 actively exploited?

No — CVE-2026-43245 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.