fbdev: udlfb: avoid divide-by-zero on FBIOPUT_VSCREENINFO

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Summary

CVECVE-2026-31605
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-24 15:16:39 UTC
Updated2026-06-01 17:16:51 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: fbdev: udlfb: avoid divide-by-zero on FBIOPUT_VSCREENINFO Much like commit 19f953e74356 ("fbdev: fb_pm2fb: Avoid potential divide by zero error"), we also need to prevent that same crash from happening in the udlfb driver as it uses pixclock directly when dividing, which will crash.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

EPSS: 0.000180000 probability, percentile 0.048130000 (date 2026-04-27)

Problem Types: CWE-369

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 59277b679f8b5ce594e367759256668eba652d0d 9981de9fb5ae0d3d6bc5ff5ca63350c2a3cdc564 git Not specified
CNA Linux Linux affected 59277b679f8b5ce594e367759256668eba652d0d fd50ab7dd4ee5bbb4aebffa76ae18484b03a8ea5 git Not specified
CNA Linux Linux affected 59277b679f8b5ce594e367759256668eba652d0d 828ce54b27de93bd9c67991bca5a2c76c76742de git Not specified
CNA Linux Linux affected 59277b679f8b5ce594e367759256668eba652d0d cce24f70090e0decb597b88bc52e8ef8efed6105 git Not specified
CNA Linux Linux affected 59277b679f8b5ce594e367759256668eba652d0d 03797cdee38ef19c87785622d423aabaafb71c5f git Not specified
CNA Linux Linux affected 59277b679f8b5ce594e367759256668eba652d0d 6de048d78f3029744778b7a2891745f3ca7c209a git Not specified
CNA Linux Linux affected 59277b679f8b5ce594e367759256668eba652d0d cccbf9b7fdab48ce4feb69c24f7f928aa8e4e8b8 git Not specified
CNA Linux Linux affected 59277b679f8b5ce594e367759256668eba652d0d afaaaa38579f1252bb42b145f6e88a955c4f73f3 git Not specified
CNA Linux Linux affected 59277b679f8b5ce594e367759256668eba652d0d a31e4518bec70333a0a98f2946a12b53b45fe5b9 git Not specified
CNA Linux Linux affected 2.6.34 Not specified
CNA Linux Linux unaffected 2.6.34 semver Not specified
CNA Linux Linux unaffected 5.10.258 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.209 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.136 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.83 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.24 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.14 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0.1 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/cce24f70090e0decb597b88bc52e8ef8efed6105 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/afaaaa38579f1252bb42b145f6e88a955c4f73f3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/cccbf9b7fdab48ce4feb69c24f7f928aa8e4e8b8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/9981de9fb5ae0d3d6bc5ff5ca63350c2a3cdc564 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a31e4518bec70333a0a98f2946a12b53b45fe5b9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/fd50ab7dd4ee5bbb4aebffa76ae18484b03a8ea5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/03797cdee38ef19c87785622d423aabaafb71c5f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/6de048d78f3029744778b7a2891745f3ca7c209a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/828ce54b27de93bd9c67991bca5a2c76c76742de 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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