CVE-2026-63800

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: pNFS: Fix use-after-free in pnfs_update_layout() When hitting the NFS_LAYOUT_RETURN branch in pnfs_update_layout(), the code calls pnfs_prepare_to_retry_layoutget(lo). If it succeeds, pnfs_put_layout_hdr(lo) is called before trace_pnfs_update_layout(), which still references 'lo'. This results in a use-after-free when the tracepoint accesses lo's fields. Fix this by moving the tracepoint call before pnfs_put_layout_hdr(lo).

Affected product and versions

Product

Linux Linux, linux kernel

Affected versions

>= 06f58dbc49a23c99e5c0f246879ed16667f7bf8f < 4ad8b9a85dbf57ca532ee9e65ad7e6498bfbbf98, >= 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 < 1f24b8302c77dcaf79c64c073877a3b9f4dd25d2, >= 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 < 9c0fb5c09ae5bd68dc0038692af8127029cb0385, >= 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 < 7e37e9b3e82ade881e1798e2f4fcc54aff7793c1, >= 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 < 2883ddd7542b4437a2ab4908fe2773f690e20889, >= 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 < 200e7637f4d6a1342987045eea72641524f909dc, >= 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 < 9645aaf689aff57427ece3b9fa47d5b5399417f4, >= 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 < 13e198a90ca4050f4bee8a3f23680389a6563ccc, >= aa2399f55eff4ec78330bb6fe55f9df53e5cae0c, >= 5.10.9 < 5.10.260, >= 5.4.91 < 5.5, >= 5.11, >= 5.11.1 < 5.15.211, >= 5.16 < 6.1.177, >= 6.2 < 6.6.144, >= 6.7 < 6.12.95, >= 6.13 < 6.18.38, >= 6.19 < 7.1.3, 5.11

Fixed versions

5.5, 5.10.260, 5.15.211, 6.1.177, 6.6.144, 6.12.95, 6.18.38, 7.1.3

Technical data

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-416