CVE-2026-64522

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-64522

Key Details

CVE	CVE-2026-64522
CVSS Score / Version	8.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 required; scope is unchanged; confidentiality impact is high; integrity impact is high; 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:

net/mlx5e: Fix eswitch mode block underflow on IPsec acquire SA

mlx5e_xfrm_add_state() handles acquire-flow temporary SAs by allocating

software state and skipping hardware offload setup.

That path jumps to the common success label before taking the eswitch mode

block. After tunnel-mode validation was moved earlier, the common success

label unconditionally calls mlx5_eswitch_unblock_mode(). For acquire SAs,

this decrements esw->offloads.num_block_mode without a matching increment.

Return directly after installing the acquire SA offload handle, so only the

paths that successfully called mlx5_eswitch_block_mode() call the matching

unblock. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-64522
CVE	https://www.cve.org/CVERecord?id=CVE-2026-64522

Source

Reference

NVD

CVE