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
Affected versions
Linux kernel versions
2.6.15
and later are affected. Fixed in
6.6.140,
6.12.90,
6.18.32,
7.0.7,
7.1-rc1
and their respective stable series.
References
The following references provide additional information about CVE-2026-46191 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/594973a2e54924d8ba31c9faac669fc1ba6fcb80
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PatchKernel patch commithttps://git.kernel.org/stable/c/7105d9f1387d63b15c9a860674fc92c959181f2f
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PatchKernel patch commithttps://git.kernel.org/stable/c/ab6c34b9829d5de03f1d08a47a2253729a6e7e27
Frequently asked questions
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What is CVE-2026-46191?
CVE-2026-46191 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.15 onward and has been patched in 6.6.140, 6.12.90, 6.18.32 and others. CVE-2026-46191 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-46191?
Yes — CVE-2026-46191 has been patched. Fixed versions include 6.6.140, 6.12.90, 6.18.32 and others. If you are running Linux kernel 2.6.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-46191 actively exploited?
No — CVE-2026-46191 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.