CVE-2026-46256NFS/localio: prevent direct reclaim recursion into NFS via nfs_writepages
- 5.5MediumCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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").
Timeline
ID reserved
By Linux
- 21 days later
· 21 days later
Published
- 5 months later
· 5 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 70ba381e1a431245c137ed597ec6a05991c79bd9 – < 9118e1cab8a5571c6a95011f77ff28480aee9cb0
- affected 70ba381e1a431245c137ed597ec6a05991c79bd9 – < ae26a4cf2baf0a44c538dc093504d1994b02dade
- affected 70ba381e1a431245c137ed597ec6a05991c79bd9 – < 6a5de0c4fc0f217eea945d3d72c34ee30d72cbc9
- affected 70ba381e1a431245c137ed597ec6a05991c79bd9 – < 67435d2d8a33a75f9647724952cb1b18279d2e95
- affected 6.12
- unaffected < 6.12
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.18.14 – ≤ 6.18.*
- unaffected 6.19.4 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References4
- https://git.kernel.org/stable/c/9118e1cab8a5571c6a95011f77ff28480aee9cb0 (opens in a new tab)
- https://git.kernel.org/stable/c/ae26a4cf2baf0a44c538dc093504d1994b02dade (opens in a new tab)
- https://git.kernel.org/stable/c/6a5de0c4fc0f217eea945d3d72c34ee30d72cbc9 (opens in a new tab)
- https://git.kernel.org/stable/c/67435d2d8a33a75f9647724952cb1b18279d2e95 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-34118 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-46256)Record last updated .