Linux Linux Kernel Out-Of-Bounds Read Rated 7.1 CVSS

Last refreshed2026-10-15

Status: UPDATED | Advisory ID: CVE-2026-46191

Key Details

CVE	CVE-2026-46191
CVSS Score / Version	7.1 (High) / CVSS v3.1
Updated	2026-10-15
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; 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)	0.14% probability of exploitation in the next 30 days (3% 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:

fbcon: Avoid OOB font access if console rotation fails

Clear the font buffer if the reallocation during console rotation fails

in fbcon_rotate_font(). The putcs implementations for the rotated buffer

will return early in this case. See [1] for an example.

Currently, fbcon_rotate_font() keeps the old buffer, which is too small

for the rotated font. Printing to the rotated console with a high-enough

character code will overflow the font buffer.

v2:

- fix typos in commit message (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-46191
CVE	https://www.cve.org/CVERecord?id=CVE-2026-46191

Source

Reference

NVD

CVE