CVE-2026-43452

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-43452

Key Details

CVE	CVE-2026-43452
CVSS Score / Version	8.2 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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 low; 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:

netfilter: x_tables: guard option walkers against 1-byte tail reads

When the last byte of options is a non-single-byte option kind, walkers

that advance with i += op[i + 1] ? : 1 can read op[i + 1] past the end

of the option area.

Add an explicit i == optlen - 1 check before dereferencing op[i + 1]

in xt_tcpudp and xt_dccp option walkers. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-43452
CVE	https://www.cve.org/CVERecord?id=CVE-2026-43452

Source

Reference

NVD

CVE