Answer in brief
CVE-2026-89672 records a Unknown severity vulnerability in nfsd: gate nfs2 setacl by argp->mask. 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.
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.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a257cdd0e2179630d3201c32ba14d7fcb3c3a055 <e41d173d9dc735cecb15ab7aa63ecab09338f81b || >=a257cdd0e2179630d3201c32ba14d7fcb3c3a055 <f951b22dbeec46f2e0fba81cb80d1b0c686b61eb || >=a257cdd0e2179630d3201c32ba14d7fcb3c3a055 <37eea38e7898538f0ec5f1eb8b18d8646e4be41c || >=a257cdd0e2179630d3201c32ba14d7fcb3c3a055 <a3a7e20ed66d3f04d37883c398da8a113b430769 | e41d173d9dc735cecb15ab7aa63ecab09338f81b, f951b22dbeec46f2e0fba81cb80d1b0c686b61eb, 37eea38e7898538f0ec5f1eb8b18d8646e4be41c, a3a7e20ed66d3f04d37883c398da8a113b430769 |
| Linux/Linuxgeneric | 2.6.13 | Not reported |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
In the Linux kernel, the following vulnerability has been resolved: nfsd: gate nfs2 setacl by argp->mask The NFSACL v2 SETACL path shares the decoder convention used by its v3 sibling: nfsaclsvc_decode_setaclargs() fills in argp->acl_access only when NFS_ACL is set in the request mask and argp->acl_default only when NFS_DFACL is set, leaving the other pointer NULL because the argument buffer is zeroed up to pc_argzero before decode. nfsacld_proc_setacl() then hands both pointers to set_posix_acl() unconditionally. set_posix_acl(idmap, dentry, type, NULL) is the VFS "remove this ACL type" operation, so an omitted arm is indistinguishable from an explicit request to delete that ACL. A SETACL carrying only NFS_ACL silently strips the directory's default ACL; mask=0 strips both. This is the same defect just fixed in nfsd3_proc_setacl(); apply the same remedy. Gate each set_posix_acl() call on its mask bit and initialize error to 0 so that a request with neither bit set leaves the on-disk ACLs untouched and returns success. The out_drop_lock path and the unconditional posix_acl_release() in nfsaclsvc_release_setacl() already tolerate the skipped arms.
Quoted source text, attributed separately from HOL analysis.