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CVE-2025-39912

nfs/localio: restore creds before releasing pageio data

MEDIUM
5.5
CVSS Score
Published: October 1, 2025 at 07:44 AM UTC
Updated: October 19, 2026 at 09:10 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: nfs/localio: restore creds before releasing pageio data Otherwise if the nfsd filecache code releases the nfsd_file immediately, it can trigger the BUG_ON(cred == current->cred) in __put_cred() when it puts the nfsd_file->nf_file->f-cred.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
6.12 ≤ v < 6.12.486.13 ≤ v < 6.16.86.126.176.17 rc16.17 rc26.17 rc36.17 rc46.17 rc5b9f5dd57f4a52990963eeb1f1b58d00f717ece69
Vendor states this is fixed in 57c1bb02b4fc8eec6eb01736e7fad26dffacf18c (fixed)
Vendor states this is fixed in 992203a1fba51b025c60ec0c8b0d9223343dea95 (fixed)
Vendor states this is fixed in c250be1d75bf80dc5ab46f0b434b746c1868a1ea (fixed)
Vendor states this is fixed in 6.12 (unaffected)
Vendor states this is fixed in 6.12.48 (unaffected)
Vendor states this is fixed in 6.16.8 (unaffected)
Vendor states this is fixed in 6.17 (unaffected)

References (3)

Patch
Source: cverecord
https://git.kernel.org/stable/c/57c1bb02b4fc8eec6eb01736e7fad26dffacf18c
Patch
Source: cverecord
https://git.kernel.org/stable/c/c250be1d75bf80dc5ab46f0b434b746c1868a1ea
Patch
Source: cverecord
https://git.kernel.org/stable/c/992203a1fba51b025c60ec0c8b0d9223343dea95

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUMCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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