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)

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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
4d82724f7f2b847eb0454b1aab5450545b39abd4 affected < f059b4c493df3e54fe3ffe4658009c31864275da
4d82724f7f2b847eb0454b1aab5450545b39abd4 affected < 967a00b8e06a7734aded23861faba9ee2462be87
4d82724f7f2b847eb0454b1aab5450545b39abd4 affected < a1ba4594232c87c3b8defd6f89a2e40f8b08395d
Linux Linux affected
Version Status Constraints
6.18 affected —
0 unaffected < 6.18
6.18.35 unaffected ≤ 6.18.*
7.0.12 unaffected ≤ 7.0.*
7.1 unaffected ≤ *

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https://git.kernel.org/stable/c/967a00b8e06a7734aded23861faba9ee2462be87 cve-icon
https://git.kernel.org/stable/c/a1ba4594232c87c3b8defd6f89a2e40f8b08395d cve-icon
https://git.kernel.org/stable/c/f059b4c493df3e54fe3ffe4658009c31864275da cve-icon
History

Sun, 19 Jul 2026 15:30:00 +0000

Type Values Removed Values Added
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)
Title drm/amdgpu: check num_entries in GEM_OP GET_MAPPING_INFO
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-07-19T14:54:50.977Z

Reserved: 2026-07-19T07:54:57.018Z

Link: CVE-2026-63878

cve-icon Vulnrichment

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