nfsd: check nfsd4_acl_to_attr() return value in nfsd4_create()
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
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- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 5 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
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 ]
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.273, 5.15.224
- Fix · CNA Linux (Linux) Fixed in 5.10.273, 5.15.224, 6.1.191, 6.6.160, 6.12.111, 6.18.51, 7.2.4, 7.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
Not affected: 3 products
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat OpenShift Container Platform 4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-89693
- 2026-10-03 Alias added: GHSA-hqc5-5f52-xmgw
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-10-21 Fix available: Linux/Linux@2d8a8ed4f9d8637ef0f18d47d19193e7b780e90e, Linux/[email protected] · CNA
- 2026-10-21 1 new reference · CNA
- 2026-10-30 Affected versions changed · Red Hat
- 2026-10-30 Fix available: Linux/Linux@04b913ab96c2a874f41b5e5a19ac7120526723c2, Linux/Linux@154acf97ecd2c0bb00f6533f86d4bd2b934475d5, Linux/[email protected] +3 · CNA
- 2026-10-30 3 new references · CNA
- 2026-11-04 Affected versions changed · Red Hat
- 2026-11-04 CVSS score changed · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/154acf97ecd2c0bb00f6533f86d4bd2b934475d5
- https://git.kernel.org/stable/c/73dfa989f6f0dedcae1f2650aab3401537044282
- https://git.kernel.org/stable/c/04b913ab96c2a874f41b5e5a19ac7120526723c2
- https://git.kernel.org/stable/c/2d8a8ed4f9d8637ef0f18d47d19193e7b780e90e
- https://git.kernel.org/stable/c/26877d3a09afb3838a053867a655ca30c46a1f81
- https://git.kernel.org/stable/c/430ed49a16cf9ca249d0fb51490582090bc4848b
- https://git.kernel.org/stable/c/80cebb0e8a8d1e758f0d671f5e047279c5c3e528
- https://git.kernel.org/stable/c/2c7912732184773dbd371a411da87af1cc080b86
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Sources
- CVE-2026-89693 · CVE Program
- CVE-2026-89693 · NVD
- FIRST EPSS
- GHSA-hqc5-5f52-xmgw · GitHub Advisory Database · CC BY 4.0
- CVE-2026-89693 · Red Hat security data · CC BY 4.0
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