What is CVE-2026-46256?

CVE-2026-46256 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 6.12 onward and patched in 6.18.14, 6.19.4 and 7.0. CVE-2026-46256 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-46256?

CVE-2026-46256 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-46256?

Yes, CVE-2026-46256 has been patched. Fixed versions include 6.18.14, 6.19.4 and 7.0. If you are running Linux kernel 6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-46256 actively exploited?

CVE-2026-46256 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-46256

In the Linux kernel, the following vulnerability has been resolved: NFS/localio: prevent direct reclaim recursion into NFS via nfs_writepages LOCALIO is an NFS loopback mount optimization that avoids using the network for READ, WRITE and COMMIT if the NFS client and server are determined to be on the same system. But because LOCALIO is still fundamentally "just NFS loopback mount" it is susceptible to recursion deadlock via direct reclaim, e.g.: NFS LOCALIO down to XFS and then back into NFS via nfs_writepages. Fix LOCALIO's potential for direct reclaim deadlock by ensuring that all its page cache allocations are done from GFP_NOFS context. Thanks to Ben Coddington for pointing out commit ad22c7a043c2 ("xfs: prevent stack overflows from page cache allocation").

Package Linux Kernel

Published 2026-06-03

Last modified 2026-06-05

Patch available

Yes

Affected versions

Linux kernel versions 6.12 and later are affected. Fixed in 6.18.14, 6.19.4, 7.0 and their respective stable series.

Affected from

≥ 6.12

Fixed in

✓ 6.18.14 6.18.x ✓ 6.19.4 6.19.x ✓ 7.0

References

The following references provide additional information about CVE-2026-46256 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/67435d2d8a33a75f9647724952cb1b18279d2e95
Patch
Kernel patch commit
https://git.kernel.org/stable/c/6a5de0c4fc0f217eea945d3d72c34ee30d72cbc9
Patch
Kernel patch commit
https://git.kernel.org/stable/c/ae26a4cf2baf0a44c538dc093504d1994b02dade
Patch

Frequently asked questions

What is CVE-2026-46256?

CVE-2026-46256 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.12 onward and has been patched in 6.18.14, 6.19.4 and 7.0. CVE-2026-46256 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-46256?

Yes — CVE-2026-46256 has been patched. Fixed versions include 6.18.14, 6.19.4 and 7.0. If you are running Linux kernel 6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-46256 actively exploited?

No — CVE-2026-46256 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.