nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations (CVE-2026-89703) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89703

nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations

Answer in brief

CVE-2026-89703 records a Unknown severity vulnerability in nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations. 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	>=8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a <d832a0587528853d45481d1faf75d4b5d062adaf \|\| >=8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a <1e4795766719ffd74b8cf0f2fde4a1350f8326bf \|\| >=8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a <a6d89032e5c6620d5bb44582a72555ce07bf1c2e \|\| >=8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a <650d370cfbc66a96dd14d517bd704689b5bda4e5 \|\| 967faa26f313a62e7bebc55d5b8122eaee43b929 \|\| >=6.11.6 <6.12	d832a0587528853d45481d1faf75d4b5d062adaf, 1e4795766719ffd74b8cf0f2fde4a1350f8326bf, a6d89032e5c6620d5bb44582a72555ce07bf1c2e, 650d370cfbc66a96dd14d517bd704689b5bda4e5, 6.12
Linux/Linuxgeneric	6.12	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to d832a0587528853d45481d1faf75d4b5d062adaf 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: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations nfsd4_drop_revoked_stid() handles FREE_STATEID for admin-revoked delegations but does not set SC_STATUS_FREED before releasing cl_lock. revoke_delegation() uses this flag to detect whether FREE_STATEID has already processed the delegation -- without it, the freed delegation is added to cl_revoked via list_add(), producing a use-after-free when cl_revoked is later traversed in __destroy_client(). The SC_STATUS_REVOKED path in nfsd4_free_stateid() (line 7983) already sets SC_STATUS_FREED correctly. Apply the same pattern to the SC_STATUS_ADMIN_REVOKED path in nfsd4_drop_revoked_stid().

Quoted source text, attributed separately from HOL analysis.