PT-2026-61195 · Linux · Linux

CVE-2026-63878 · Publicado 2026-07-19 · Atualizado 2026-07-19

Mitre

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)

Identificadores relacionados

CVE-2026-63878

Produtos afetados

Linux

Referências · 4

• https://git.kernel.org/stable/c/f059b4c493df3e54fe3ffe4658009c31864275da · Nota
• https://nvd.nist.gov/vuln/detail/CVE-2026-63878 · Nota de Segurança
• https://git.kernel.org/stable/c/967a00b8e06a7734aded23861faba9ee2462be87 · Nota
• https://git.kernel.org/stable/c/a1ba4594232c87c3b8defd6f89a2e40f8b08395d · Nota