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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-63878

drm/amdgpu: check num_entries in GEM_OP GET_MAPPING_INFO

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: check num_entries in GEM_OP GET_MAPPING_INFO kvcalloc(args->num_entries, sizeof(*vm_entries), GFP_KERNEL) at amdgpu_gem.c:1050 uses the user-supplied num_entries directly without any upper bounds check. Since num_entries is a __u32 and sizeof(drm_amdgpu_gem_vm_entry) is 32 bytes, a large num_entries produces an allocation exceeding INT_MAX, triggering WARNING in __kvmalloc_node_noprof(), causing a kernel WARNING, TAINT_WARN, and panic on CONFIG_PANIC_ON_WARN=y systems. Add a size bounds check before we invoke the kvzalloc() to reject oversized num_entries early with -EINVAL. (cherry picked from commit 1fe7bf5457f6efd7be60b17e23163ba54341d73d)

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 4d82724f7f2b847eb0454b1aab5450545b39abd4 to < f059b4c493df3e54fe3ffe4658009c31864275daaffected
  • 4d82724f7f2b847eb0454b1aab5450545b39abd4 to < 967a00b8e06a7734aded23861faba9ee2462be87affected
  • 4d82724f7f2b847eb0454b1aab5450545b39abd4 to < a1ba4594232c87c3b8defd6f89a2e40f8b08395daffected

Linux Linux

Default version status: affected

  • 6.18affected
  • 0 to < 6.18unaffected
  • 6.18.35 to ≤ 6.18.*unaffected
  • 7.0.12 to ≤ 7.0.*unaffected
  • 7.1 to ≤ *unaffected

References