fbcon: Avoid OOB font access if console rotation fails

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Summary

CVECVE-2026-46191
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-28 10:16:34 UTC
Updated2026-05-28 13:44:01 UTC
DescriptionIn 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

Risk And Classification

EPSS: 0.000180000 probability, percentile 0.050770000 (date 2026-06-01)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 6cc50e1c5b57180fd37a31282000f43859b0fe73 594973a2e54924d8ba31c9faac669fc1ba6fcb80 git Not specified
CNA Linux Linux affected 6cc50e1c5b57180fd37a31282000f43859b0fe73 ab6c34b9829d5de03f1d08a47a2253729a6e7e27 git Not specified
CNA Linux Linux affected 6cc50e1c5b57180fd37a31282000f43859b0fe73 7105d9f1387d63b15c9a860674fc92c959181f2f git Not specified
CNA Linux Linux affected 6cc50e1c5b57180fd37a31282000f43859b0fe73 b44cc78ff46b96e72d333a3be6aaaa0a14797263 git Not specified
CNA Linux Linux affected 6cc50e1c5b57180fd37a31282000f43859b0fe73 e4ef723d8975a2694cc90733a6b888a5e2841842 git Not specified
CNA Linux Linux affected 2.6.15 Not specified
CNA Linux Linux unaffected 2.6.15 semver Not specified
CNA Linux Linux unaffected 6.6.140 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.90 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.32 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.7 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ab6c34b9829d5de03f1d08a47a2253729a6e7e27 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/594973a2e54924d8ba31c9faac669fc1ba6fcb80 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b44cc78ff46b96e72d333a3be6aaaa0a14797263 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e4ef723d8975a2694cc90733a6b888a5e2841842 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7105d9f1387d63b15c9a860674fc92c959181f2f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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