VulnerabilityPublished 3 Jun 2026Updated 21 Oct 2026

CVE-2026-46256: Linux kernel · NFS/localio: prevent direct reclaim recursion into NFS via nfs_writepages

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in ae26a4cf2baf0a44c538dc093504d1994b02dade : update Linux kernel when convenient.

Data as of 26 Oct 2026, 15:59 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in ae26a4cf2baf0a44c538dc093504d1994b02dade, 67435d2d8a33a75f9647724952cb1b18279d2e95, 9118e1cab8a5571c6a95011f77ff28480aee9cb0 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 3 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to ae26a4cf2baf0a44c538dc093504d1994b02dade, 67435d2d8a33a75f9647724952cb1b18279d2e95, 9118e1cab8a5571c6a95011f77ff28480aee9cb0 or 6a5de0c4fc0f217eea945d3d72c34ee30d72cbc9.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 70ba381e1a431245c137ed597ec6a05991c79bd9, < ae26a4cf2baf0a44c538dc093504d1994b02dade	Fixed in ae26a4cf2baf0a44c538dc093504d1994b02dade
LinuxLinux	Affected ≥ 70ba381e1a431245c137ed597ec6a05991c79bd9, < 67435d2d8a33a75f9647724952cb1b18279d2e95	Fixed in 67435d2d8a33a75f9647724952cb1b18279d2e95
LinuxLinux	Affected ≥ 70ba381e1a431245c137ed597ec6a05991c79bd9, < 9118e1cab8a5571c6a95011f77ff28480aee9cb0	Fixed in 9118e1cab8a5571c6a95011f77ff28480aee9cb0
LinuxLinux	Affected ≥ 70ba381e1a431245c137ed597ec6a05991c79bd9, < 6a5de0c4fc0f217eea945d3d72c34ee30d72cbc9	Fixed in 6a5de0c4fc0f217eea945d3d72c34ee30d72cbc9
LinuxLinux	Affected =6.12	Fixed in–

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").

References

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