CVE-2026-46256

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").

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Produits concernés

• Linux
• Linux linux kernel

Scores CVSS

Faiblesses (CWE)

• CWE-667

Références

• https://git.kernel.org/stable/c/67435d2d8a33a75f9647724952cb1b18279d2e95 Patch
• https://git.kernel.org/stable/c/6a5de0c4fc0f217eea945d3d72c34ee30d72cbc9 Patch
• https://git.kernel.org/stable/c/9118e1cab8a5571c6a95011f77ff28480aee9cb0
• https://git.kernel.org/stable/c/ae26a4cf2baf0a44c538dc093504d1994b02dade Patch

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories