CVE-2026-43042

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-43042

Key Details

CVE	CVE-2026-43042
CVSS Score / Version	7.1 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is none; availability impact is high.
Affected products	Linux Kernel
Classified as	CWE-125 (Out-of-bounds Read)

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:

mpls: add seqcount to protect the platform_label{,s} pair

The RCU-protected codepaths (mpls_forward, mpls_dump_routes) can have

an inconsistent view of platform_labels vs platform_label in case of a

concurrent resize (resize_platform_label_table, under

platform_mutex). This can lead to OOB accesses.

This patch adds a seqcount, so that we get a consistent snapshot.

Note that mpls_label_ok is also susceptible to this, so the check

against RTA_DST in rtm_to_route_config, done outside platform_mutex,

is not sufficient. This value gets passed to mpls_label_ok once more

in both mpls_route_add and mpls_route_del, so there is no issue, but

that additional check must not be removed. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-43042
CVE	https://www.cve.org/CVERecord?id=CVE-2026-43042

Source

Reference

NVD

CVE