CVE-2026-63878: Linux

Описание

Оригинално описание

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)

Засегнати продукти

• Linux Linux: 4d82724f7f2b847eb0454b1aab5450545b39abd4 преди f059b4c493df3e54fe3ffe4658009c31864275da; 4d82724f7f2b847eb0454b1aab5450545b39abd4 преди 967a00b8e06a7734aded23861faba9ee2462be87; 4d82724f7f2b847eb0454b1aab5450545b39abd4 преди a1ba4594232c87c3b8defd6f89a2e40f8b08395d
• Linux Linux: 6.18; преди 6.18; 6.18.35 до 6.18.*; 7.0.12 до 7.0.*; от 7.1 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-63878
• https://nvd.nist.gov/vuln/detail/CVE-2026-63878
• https://git.kernel.org/stable/c/f059b4c493df3e54fe3ffe4658009c31864275da
• https://git.kernel.org/stable/c/967a00b8e06a7734aded23861faba9ee2462be87
• https://git.kernel.org/stable/c/a1ba4594232c87c3b8defd6f89a2e40f8b08395d