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Vulnerability record · CVE-2026-46191 · published 28 May 2026

CVE-2026-46191: Linux kernel out-of-bounds read vulnerability

Linux · Linux Kernel

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

7.1 CVSS 3.1 High EPSS 0.17% · top 94.7% CWE-125 · Out-of-bounds read
7.1CVSS 3.1 base score
0.17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
19 Jun 2026Last modified by NVD

Description

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

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/46cf3646dea54baeaa2eafe3fb1ba769947f31b0
https://git.kernel.org/stable/c/524a6079395916fb3d790ef2bb46a1d2939b27dd
https://git.kernel.org/stable/c/594973a2e54924d8ba31c9faac669fc1ba6fcb80 Patch
https://git.kernel.org/stable/c/7105d9f1387d63b15c9a860674fc92c959181f2f Patch
https://git.kernel.org/stable/c/ab6c34b9829d5de03f1d08a47a2253729a6e7e27 Patch
https://git.kernel.org/stable/c/b44cc78ff46b96e72d333a3be6aaaa0a14797263 Patch
https://git.kernel.org/stable/c/b51c343a81e6e806525a4435e22532c107dd7e9d
https://git.kernel.org/stable/c/e4ef723d8975a2694cc90733a6b888a5e2841842 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-46191), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.