drm/log: Fix infinite loop when scale is too large for display

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Summary

CVECVE-2026-80740
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-03 13:06:13 UTC
Updated2026-09-03 13:06:13 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/log: Fix infinite loop when scale is too large for display When scale is large enough that scaled_font exceeds the display dimensions, rows or columns become 0. A columns value of 0 causes an infinite loop in drm_log_draw_kmsg_record() because the loop never decrements len. Check for zero rows/columns in drm_log_setup_modeset() and return an error, cleaning up the already allocated buffer to avoid a leak.

Risk And Classification

EPSS: 0.001660000 probability, percentile 0.061060000 (date 2026-09-07)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 8a4b913df427b8f900bcc7849cc15a7b81628d57 a7d172b27aa3e1ad56e39949bfe4e5caa25fb20b git Not specified
CNA Linux Linux affected 8a4b913df427b8f900bcc7849cc15a7b81628d57 50ca4dbbaf3eb6deb74daca360b4dabc739a6fa6 git Not specified
CNA Linux Linux affected 8a4b913df427b8f900bcc7849cc15a7b81628d57 f4f2bba28df9b9aaa00262a462139dbbcdc38d9f git Not specified
CNA Linux Linux affected 6.14 Not specified
CNA Linux Linux unaffected 6.14 semver Not specified
CNA Linux Linux unaffected 6.18.46 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.10 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/f4f2bba28df9b9aaa00262a462139dbbcdc38d9f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/50ca4dbbaf3eb6deb74daca360b4dabc739a6fa6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a7d172b27aa3e1ad56e39949bfe4e5caa25fb20b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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