CVE-2026-46191

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 v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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
https://cert-portal.siemens.com/productcert/html/ssa-784472.html

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

15 Oct 2026, 02:19

Type	Values Removed	Values Added
References		() https://cert-portal.siemens.com/productcert/html/ssa-784472.html -

Information

Published : 2026-05-28 10:16

Updated : 2026-10-15 02:19

NVD link : CVE-2026-46191

Mitre link : CVE-2026-46191

CVE.ORG link : CVE-2026-46191

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-125

Out-of-bounds Read

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The putcs implementations for the rotated buffer\nwill return early in this case. See [1] for an example.\n\nCurrently, fbcon_rotate_font() keeps the old buffer, which is too small\nfor the rotated font. Printing to the rotated console with a high-enough\ncharacter code will overflow the font buffer.\n\nv2:\n- fix typos in commit message"}], "lastModified": "2026-10-15T02:19:49.467", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "72788083-DE76-436F-8F3A-A2B84197FB84", "versionEndExcluding": "6.6.140", "versionStartIncluding": "2.6.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3BAAA2BE-6EEC-45D5-AD66-50F63CA20483", "versionEndExcluding": "6.12.90", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CB9F1FA8-6D5E-42B1-9877-57BACFE5C886", "versionEndExcluding": "6.18.32", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D0893CA7-9AE6-4DFE-AC75-48967D73AD8E", "versionEndExcluding": "7.0.7", "versionStartIncluding": "6.19"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}