CVE-2026-63800
critical · 9.8In 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).
9.8
CVSS
0.5%
EPSS (exploit prob.)
44th
EPSS percentile
2026-07-19
Published
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-416
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| linux | linux_kernel | >= 5.4.91, < 5.5 |
| linux | linux_kernel | >= 5.10.9, < 5.10.260 |
| linux | linux_kernel | >= 5.11.1, < 5.15.211 |
| linux | linux_kernel | >= 5.16, < 6.1.177 |
| linux | linux_kernel | >= 6.2, < 6.6.144 |
| linux | linux_kernel | >= 6.7, < 6.12.95 |
| linux | linux_kernel | >= 6.13, < 6.18.38 |
| linux | linux_kernel | >= 6.19, < 7.1.3 |
| linux | linux_kernel | 5.11 |
| linux | linux_kernel | 5.11 |
| linux | linux_kernel | 5.11 |
| linux | linux_kernel | 5.11 |
| linux | linux_kernel | 5.11 |
Check a specific version with /api/v1/cve/match.
References
- https://git.kernel.org/stable/c/13e198a90ca4050f4bee8a3f23680389a6563ccc
- https://git.kernel.org/stable/c/1f24b8302c77dcaf79c64c073877a3b9f4dd25d2
- https://git.kernel.org/stable/c/200e7637f4d6a1342987045eea72641524f909dc
- https://git.kernel.org/stable/c/2883ddd7542b4437a2ab4908fe2773f690e20889
- https://git.kernel.org/stable/c/4ad8b9a85dbf57ca532ee9e65ad7e6498bfbbf98
- https://git.kernel.org/stable/c/7e37e9b3e82ade881e1798e2f4fcc54aff7793c1
- https://git.kernel.org/stable/c/9645aaf689aff57427ece3b9fa47d5b5399417f4
- https://git.kernel.org/stable/c/9c0fb5c09ae5bd68dc0038692af8127029cb0385
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2026-63800