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CVE

CVE-2026-63800

pNFS: Fix use-after-free in pnfs_update_layout()
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CVE

CVE-2026-63800

pNFS: Fix use-after-free in pnfs_update_layout()

In the Linux kernel, the following vulnerability has been resolved:

pNFS: Fix use-after-free in pnfsupdatelayout()

When hitting the NFSLAYOUTRETURN branch in pnfsupdatelayout(),

the code calls pnfspreparetoretrylayoutget(lo). If it succeeds,

pnfsputlayouthdr(lo) is called before tracepnfsupdatelayout(),

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 pnfsputlayout_hdr(lo).

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

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, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63800.json, https://nvd.nist.gov/vuln/detail/CVE-2026-63800, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.00527%
EPSS Percentile
0.42617%
Introduced Version
06f58dbc49a23c99e5c0f246879ed16667f7bf8f,2c8d5fc37fe2384a9bdb6965443ab9224d46f704,0,5.10.9,5.4.91,5.11.0,5.16.0,6.2.0,6.7.0,6.13.0
Fix Available
4ad8b9a85dbf57ca532ee9e65ad7e6498bfbbf98,13e198a90ca4050f4bee8a3f23680389a6563ccc,5.10.260,5.5,6.1.177,6.6.144,6.12.95,6.18.38,7.1.3,0:4.18.0-553.159.1.rt7.500.el8_10,0:4.18.0-553.159.1.el8_10,6.1.177-1,6.12.95-1,0:5.15.0-323.211.3.3.el8uek,0:6.12.0-206.104.3.3.el9uek,0:5.15.0-323.211.3.3.el9uek,0:6.12.0-206.104.3.3.el10uek,0:6.12.0-211.50.1.el10_2,0:5.10.260-259.1053.amzn2,0:1.0-0.amzn2,0:5.15.211-149.249.amzn2,1:6.18.38-73.137.amzn2023,1:1.0-0.amzn2023,1:6.12.95-124.187.amzn2023,1:6.1.177-224.371.amzn2023

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