Unauthenticated Remote Vulnerability in Linux Linux Kernel Rates 9.8 CVSS

Last refreshed2026-10-15

Status: UPDATED | Advisory ID: CVE-2026-74669

Key Details

CVE	CVE-2026-74669
CVSS Score / Version	9.8 (Critical) / CVSS v3.1
Updated	2026-10-14
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
Exploitation prediction (EPSS)	0.51% probability of exploitation in the next 30 days (42% percentile) -- FIRST.org's EPSS model.

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:

ipvs: clear IPv4 options after rebasing tunnel ICMP errors

ip_vs_in_icmp() rebases an skb from the outer ICMP packet to the

quoted original request before passing it to icmp_send(). However,

IPCB(skb)->opt still describes the outer IPv4 header.

A timestamp option in the outer header can therefore leave an offset

that points into the quoted transport header after the rebase.

__ip_options_echo() treats a byte at that stale location as the option

length and copies it into the fixed-size option storage on the

__icmp_send() stack, causing a stack out-of-bounds write.

Clear the stale option metadata after resetting the network header.

Keep the remaining control block fields, including the ingress

interface used by the ICMP response path. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-74669
CVE	https://www.cve.org/CVERecord?id=CVE-2026-74669

Source

Reference

NVD

CVE