CVE-2026-90038

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-90038

Key Details

CVE	CVE-2026-90038
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: Prevent client use-after-free during export state revocation

nfsd4_revoke_export_states() has the same use-after-free as

nfsd4_revoke_states(): it drops nn->client_lock across

revoke_one_stid() and the following read of clp->cl_minorversion, but

the stateid reference it holds does not pin the client. A teardown

racing the dropped lock can free the client while revoke_one_stid()

still dereferences it.

exportfs -u drives this path through NFSD_CMD_UNLOCK_EXPORT, so an

administrator removing an export can race a client expiry.

Skip a client that is already expiring and otherwise pin it with

cl_rpc_users under client_lock before dropping the lock, matching

nfsd4_revoke_states(). (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-90038
CVE	https://www.cve.org/CVERecord?id=CVE-2026-90038

Source

Reference

NVD

CVE