Bug 2516866 (CVE-2026-74417)

Summary: CVE-2026-74417 kernel: drm/radeon: fix integer overflow in radeon_align_pitch()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's drm/radeon component. An integer overflow vulnerability exists in the `radeon_align_pitch()` function. This flaw occurs when calculating memory alignment and pitch, where large values can cause the calculations to wrap around. If exploited, this could lead to the creation of an invalid pitch or a zero-sized buffer, potentially resulting in a Denial of Service (DoS) condition for the system.
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Description OSIDB Bzimport 2026-08-15 06:37:34 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/radeon: fix integer overflow in radeon_align_pitch()

radeon_align_pitch() has the same kind of overflow issue as the old
amdgpu helper: both the alignment round-up add and the final
'aligned * cpp' calculation can overflow signed int.

If that wraps, radeon_mode_dumb_create() can end up returning an
invalid pitch or creating a zero-sized dumb buffer.

Fix this by using check_add_overflow() for the alignment round-up and
check_mul_overflow() for the final pitch calculation, returning 0 on
overflow. Also reject zero pitch and size in
radeon_mode_dumb_create().

Found via AST-based call-graph analysis using sqry.
Comment 1 Keith Grant 2026-08-20 21:50:04 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081512-CVE-2026-74417-ee3c@gregkh/T