CVE-2026-46256NFS/localio: prevent direct reclaim recursion into NFS via nfs_writepages
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 70ba381e1a431245c137ed597ec6a05991c79bd9 before 9118e1cab8a5571c6a95011f77ff28480aee9cb0; from 70ba381e1a431245c137ed597ec6a05991c79bd9 before ae26a4cf2baf0a44c538dc093504d1994b02dade; 70ba381e1a431245c137ed597ec6a05991c79bd9 builds before 6a5de0c4fc0f217eea945d3d72c34ee30d72cbc9; from 70ba381e1a431245c137ed597ec6a05991c79bd9 before 67435d2d8a33a75f9647724952cb1b18279d2e95 | CNA record |
linux linux_kernel linux:linux_kernel | from 6.12 before 6.18.14; from 6.19 before 6.19.4 | NVD |
References
- https://git.kernel.org/stable/c/9118e1cab8a5571c6a95011f77ff28480aee9cb0
- https://git.kernel.org/stable/c/ae26a4cf2baf0a44c538dc093504d1994b02dadepatch
- https://git.kernel.org/stable/c/6a5de0c4fc0f217eea945d3d72c34ee30d72cbc9patch
- https://git.kernel.org/stable/c/67435d2d8a33a75f9647724952cb1b18279d2e95patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.