CVE-2026-89703

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-89703

Key Details

CVE	CVE-2026-89703
CVSS Score / Version	9.8 (Critical) / CVSS v3.1
Updated	2026-10-19
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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(). (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-89703
CVE	https://www.cve.org/CVERecord?id=CVE-2026-89703

Source

Reference

NVD

CVE