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().

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required High

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.002.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/1e4795766719ffd74b8cf0f2fde4a1350f8326bf cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/650d370cfbc66a96dd14d517bd704689b5bda4e5 cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/a6d89032e5c6620d5bb44582a72555ce07bf1c2e cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/d832a0587528853d45481d1faf75d4b5d062adaf cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-89703 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-89703 cve-icon
History

Sat, 12 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-825
References
Metrics threat_severity

None

 cvssV3_1

{'score': 4.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Important

Sat, 12 Sep 2026 10:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Fri, 11 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
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().
Title nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-09-11T19:46:20.280Z

Reserved: 2026-09-11T19:38:34.750Z

Link: CVE-2026-89703

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-11T20:19:57.537

Modified: 2026-09-11T20:19:57.537

Link: CVE-2026-89703

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-11T19:46:20Z

Links: CVE-2026-89703 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-12T10:00:08Z

Weaknesses