CVE-2026-90151

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-90151

Key Details

CVE	CVE-2026-90151
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:

NFSv4: remove callback IDR entry on client allocation failure

nfs4_alloc_client() allocates an NFSv4.0 callback identifier before it

finishes setting up the client. If any later initialization step fails,

the error path frees the nfs_client directly with nfs_free_client(). That

bypasses nfs_put_client(), which is where the callback IDR entry is

removed during normal teardown.

A failed allocation can therefore leave cb_ident_idr pointing at a freed

nfs_client. A later NFSv4.0 callback lookup by cb_ident would find the

stale pointer and take a reference to it.

Make the callback IDR removal helper callable by the allocation failure

path, and remove the callback identifier before freeing the client.

This was found by a local static-analysis checker for publish-before-free

lifetime bugs and confirmed by manual inspection. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-90151
CVE	https://www.cve.org/CVERecord?id=CVE-2026-90151

Source

Reference

NVD

CVE