CVE-2026-46256

MEDIUM EPSS 1.0%
Published Jun 3, 20263w ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jun 3, 2026 3w ago
Last Modified Jun 17, 2026 1w ago

Description

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").

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
1.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-667

Affected Products 2

VendorProductVersionRange
linuxlinux_kernel*≥6.12  –  <6.18.14
linuxlinux_kernel*≥6.19  –  <6.19.4

References 3

  • git.kernel.org https://git.kernel.org/stable/c/67435d2d8a33a75f9647724952cb1b18279d2e95
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6a5de0c4fc0f217eea945d3d72c34ee30d72cbc9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ae26a4cf2baf0a44c538dc093504d1994b02dade
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/67435d2d8a33a75f9647724952cb1b18279d2e95
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6a5de0c4fc0f217eea945d3d72c34ee30d72cbc9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ae26a4cf2baf0a44c538dc093504d1994b02dade
    Patch