staging: sm750fb: fix division by zero in ps_to_hz()

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Summary

CVECVE-2026-31603
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: staging: sm750fb: fix division by zero in ps_to_hz() ps_to_hz() is called from hw_sm750_crtc_set_mode() without validating that pixclock is non-zero. A zero pixclock passed via FBIOPUT_VSCREENINFO causes a division by zero. Fix by rejecting zero pixclock in lynxfb_ops_check_var(), consistent with other framebuffer drivers.

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 81dee67e215b23f0c98182eece122b906d35765a 124a43550db8a74eef080cd4573a4904efe67029 git Not specified
CNA Linux Linux affected 81dee67e215b23f0c98182eece122b906d35765a b285a8f3bbb821a93eb37c2740a68ca1d7112a59 git Not specified
CNA Linux Linux affected 81dee67e215b23f0c98182eece122b906d35765a 3300b049693138852a4c6738b5f1194a1ee91ddd git Not specified
CNA Linux Linux affected 81dee67e215b23f0c98182eece122b906d35765a 779412e0e391fd4a0d12e1d1adaa7bf043de62d7 git Not specified
CNA Linux Linux affected 81dee67e215b23f0c98182eece122b906d35765a 2f640c6043aeab31a2f607d7605271860c3b11df git Not specified
CNA Linux Linux affected 81dee67e215b23f0c98182eece122b906d35765a 1412ba36597a82e928f20047f41d6c6582dafe8a git Not specified
CNA Linux Linux affected 81dee67e215b23f0c98182eece122b906d35765a 6144895a4335a2491c282931f1f2fa610b86339f git Not specified
CNA Linux Linux affected 81dee67e215b23f0c98182eece122b906d35765a daf6733bd7c4c5015b431739ac29b0e29021096b git Not specified
CNA Linux Linux affected 81dee67e215b23f0c98182eece122b906d35765a 75a1621e4f91310673c9acbcbb25c2a7ff821cd3 git Not specified
CNA Linux Linux affected 4.1 Not specified
CNA Linux Linux unaffected 4.1 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/daf6733bd7c4c5015b431739ac29b0e29021096b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/124a43550db8a74eef080cd4573a4904efe67029 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6144895a4335a2491c282931f1f2fa610b86339f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/2f640c6043aeab31a2f607d7605271860c3b11df 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/b285a8f3bbb821a93eb37c2740a68ca1d7112a59 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/779412e0e391fd4a0d12e1d1adaa7bf043de62d7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3300b049693138852a4c6738b5f1194a1ee91ddd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/75a1621e4f91310673c9acbcbb25c2a7ff821cd3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/1412ba36597a82e928f20047f41d6c6582dafe8a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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