CVE-2026-89699

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-89699

Key Details

CVE	CVE-2026-89699
CVSS Score / Version	7.5 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 none; integrity impact is none; 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: validate symlink target length in NFSv4 CREATE

nfsd4_decode_create() accepts an unbounded cr_datalen from the wire for

NF4LNK symlink targets, allowing a client to force a kmalloc of up to

the maximum RPC payload size (several MiB) per COMPOUND op that persists

until compound teardown. The VFS rejects oversized targets with

ENAMETOOLONG, but the allocation has already occurred.

Reject cr_datalen == 0 early with nfserr_inval and cr_datalen greater

than NFS4_MAXPATHLEN (PATH_MAX) with nfserr_nametoolong to bound the

allocation. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-89699
CVE	https://www.cve.org/CVERecord?id=CVE-2026-89699

Source

Reference

NVD

CVE