CVE-2026-72348

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-72348

Key Details

CVE	CVE-2026-72348
CVSS Score / Version	9.1 (Critical) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`
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 none.
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: ip6tables: mark malformed IPv6 extension headers for hotdrop

The ah, hbh and rt matches check that the fixed extension header is

present, then use the header length field to derive the advertised

extension header length for matching.

For the ah match, add the missing advertised-length check. For hbh

and rt, update the existing advertised-length checks. In all three

cases, set hotdrop to true before returning false when the advertised

extension header length exceeds the available skb data.

Returning false treats the packet as a rule mismatch. Set hotdrop to

true and drop malformed packets so they cannot bypass rules intended

to drop packets with these IPv6 extension headers. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-72348
CVE	https://www.cve.org/CVERecord?id=CVE-2026-72348

Source

Reference

NVD

CVE