drm/komeda: fix integer overflow in AFBC framebuffer size check

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Summary

CVECVE-2026-53068
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-24 17:17:19 UTC
Updated2026-06-28 08:16:32 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/komeda: fix integer overflow in AFBC framebuffer size check The AFBC framebuffer size validation calculates the minimum required buffer size by adding the AFBC payload size to the framebuffer offset. This addition is performed without checking for integer overflow. If the addition oveflows, the size check may incorrectly succed and allow userspace to provide an undersized drm_gem_object, potentially leading to out-of-bounds memory access. Add usage of check_add_overflow() to safely compute the minimum required size and reject the framebuffer if an overflow is detected. This makes the AFBC size validation more robust against malformed. Found by Linux Verification Center (linuxtesting.org) with SVACE.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.001640000 probability, percentile 0.060060000 (date 2026-06-27)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 65ad2392dd6d1691db93e82b08d3311298b9d64a a3a2a9bdc0f9c2d863a5a290cb2d4a565f7268e7 git Not specified
CNA Linux Linux affected 65ad2392dd6d1691db93e82b08d3311298b9d64a e27b58095d7d3ac72f230e318838dee956258460 git Not specified
CNA Linux Linux affected 65ad2392dd6d1691db93e82b08d3311298b9d64a 02ff8a7d3d0eecc546b9ab4c07b3d7c65d485583 git Not specified
CNA Linux Linux affected 65ad2392dd6d1691db93e82b08d3311298b9d64a d8a541906860aa3519b1874780d933c766918a7c git Not specified
CNA Linux Linux affected 65ad2392dd6d1691db93e82b08d3311298b9d64a 8165e8b28fdf392c2c7412518d602b4f193812a8 git Not specified
CNA Linux Linux affected 65ad2392dd6d1691db93e82b08d3311298b9d64a fe1f80f8f6e8611ac6349b9d464e8750443390cf git Not specified
CNA Linux Linux affected 65ad2392dd6d1691db93e82b08d3311298b9d64a 872d923b852705054bc099af663da862fdc1097d git Not specified
CNA Linux Linux affected 65ad2392dd6d1691db93e82b08d3311298b9d64a 779ec12c85c9e4547519e3903a371a3b26a289de git Not specified
CNA Linux Linux affected 5.3 Not specified
CNA Linux Linux unaffected 5.3 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 6.6.141 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.91 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.33 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.10 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/e27b58095d7d3ac72f230e318838dee956258460 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/779ec12c85c9e4547519e3903a371a3b26a289de 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/872d923b852705054bc099af663da862fdc1097d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d8a541906860aa3519b1874780d933c766918a7c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/02ff8a7d3d0eecc546b9ab4c07b3d7c65d485583 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8165e8b28fdf392c2c7412518d602b4f193812a8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a3a2a9bdc0f9c2d863a5a290cb2d4a565f7268e7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fe1f80f8f6e8611ac6349b9d464e8750443390cf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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