CVE-2026-74447High· 7.8▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: fix uint32_t overflow in EOP ring buffer size alignment eop_ring_buffer_size in struct queue_properties is a u32. In kfd_queue_acquire_buffers() the expect…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
In the Linux kernel, the following vulnerability has been resolved:
drm/amdkfd: fix uint32_t overflow in EOP ring buffer size alignment
eop_ring_buffer_size in struct queue_properties is a u32. In kfd_queue_acquire_buffers() the expected EOP buffer size is computed as ALIGN(eop_ring_buffer_size, PAGE_SIZE); ALIGN uses typeof(x), so the addition is done in 32-bit. A user-supplied size of 0xFFFFF001 wraps to 0, causing kfd_queue_buffer_get() to skip its exact-size check (gated on size != 0) and accept any BO mapped at the address. On GFX8/GFX9 the MQD cp_hqd_eop_control is then programmed for an 8KB EOP ring backed by a 4KB BO, so CP EOP writes can land past the buffer and fault the GPU.
Cast the operand to u64 so the alignment is computed in 64-bit; the size check in kfd_queue_buffer_get() then rejects the oversized request.
(cherry picked from commit ae443117b742c357bfef3a7bddabf76fcf86e9ef)
Linux >= ee0dc6c66a913260311876a4b2b53fe0b9bc3f94 < 273548eb997c6be85230c1236b18784b09f6203cLinux >= acfc84cfa70aca5b970faf152979bc97b9f8b0c0 < 6dc0b4b39ed4f11ef70f76ecea8537e35f45342bLinux >= 42ea9cf2f16b7131cb7302acb3dac510968f8bdc < 7c54bd225d83bc1bcb44430ed4b4d3a5c36b1961Linux >= 42ea9cf2f16b7131cb7302acb3dac510968f8bdc < 83463a96ea3c7d8ae636a4d6a0ba63c9ce410724Linux c6ce687077cc67e4f3cbd0c89cb356fbbce91f4cLinux >= 6.12.75 < 6.12.103Linux >= 6.18.16 < 6.18.44Linux >= 6.19.6 < 6.20Linux 7.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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