Linux Kernel XDP Out-Of-Bounds Read Rated 8.1 CVSS

Last refreshed2026-10-15

Status: UPDATED | Advisory ID: CVE-2026-53147

Key Details

CVE	CVE-2026-53147
CVSS Score / Version	8.1 (High) / CVSS v3.1
Updated	2026-10-15
CVSS Vector	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H`
CVSS Prose	attack vector is adjacent; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is none; availability impact is high.
Affected products	Linux Kernel and Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classified as	CWE-125 (Out-of-bounds Read)
Exploitation prediction (EPSS)	0.27% probability of exploitation in the next 30 days (18% percentile) -- FIRST.org's EPSS model.

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel
Siemens	SIMATIC S7-1500 TM MFP - GNU/Linux subsystem

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Siemens

SIMATIC S7-1500 TM MFP - GNU/Linux subsystem

Subsystems	Controllers & Field I/O, OT Supporting Infrastructure
Sectors	All Sectors

In the Linux kernel, the following vulnerability has been resolved:

thunderbolt: Validate XDomain request packet size before type cast

tb_xdp_handle_request() casts the received packet buffer to

protocol-specific structs without verifying that the allocation

is large enough for the target type. A peer can send a minimal

XDomain packet that passes the generic header length check but is

shorter than the struct accessed after the cast, causing out-of-

bounds reads from the kmemdup allocation.

Plumb the packet length through xdomain_request_work and validate

it against the expected struct size before each cast. (NVD)

Monitor Linux's and Siemens's web pages for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-53147
CVE	https://www.cve.org/CVERecord?id=CVE-2026-53147

Source

Reference

NVD

CVE