CVE-2026-74417

Summary

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.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/b7b44937c548c2c987fcdd129f8896741004bed6
• https://git.kernel.org/stable/c/415bb9893e249e46aa5159f7363a11512cf06fa9
• https://git.kernel.org/stable/c/d9dfa176899d488e48bb7342d2c43ddd36e66318
• https://git.kernel.org/stable/c/dfc7b5b5599472277e71e5bd2712740651c7c5be
• https://git.kernel.org/stable/c/ce3b24eb3ee8f82de851535f516bf21f83e82259

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