nfsd: check nfsd4_acl_to_attr() return value in nfsd4_create() (CVE-2026-89693) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89693

nfsd: check nfsd4_acl_to_attr() return value in nfsd4_create()

Answer in brief

CVE-2026-89693 records a Unknown severity vulnerability in nfsd: check nfsd4_acl_to_attr() return value in nfsd4_create(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 11, 2026Updated Sep 11, 2026Source checked Sep 11, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b <430ed49a16cf9ca249d0fb51490582090bc4848b \|\| >=c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b <80cebb0e8a8d1e758f0d671f5e047279c5c3e528 \|\| >=c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b <2c7912732184773dbd371a411da87af1cc080b86 \|\| c5409ce523af40d5c3019717bc5b4f72038d48be \|\| d52acd23a327cada5fb597591267cfc09f08bb1d \|\| >=5.10.220 <5.11 \|\| >=5.15.154 <5.16	430ed49a16cf9ca249d0fb51490582090bc4848b, 80cebb0e8a8d1e758f0d671f5e047279c5c3e528, 2c7912732184773dbd371a411da87af1cc080b86, 5.11, 5.16
Linux/Linuxgeneric	6.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 430ed49a16cf9ca249d0fb51490582090bc4848b if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 11, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: nfsd: check nfsd4_acl_to_attr() return value in nfsd4_create() nfsd4_create() stores the return value of nfsd4_acl_to_attr() in status, but the switch(create->cr_type) block unconditionally overwrites it in every branch. ACL translation errors are silently discarded, and the CREATE proceeds without the requested ACL. Add an early exit check after nfsd4_acl_to_attr(), matching the pattern already used in nfsd4_setattr(). [ cel: prefer NFS4ERR_BADTYPE over NFS4ERR_ATTRNOTSUPP ]

Quoted source text, attributed separately from HOL analysis.