CVE-2026-63878
- Source
- https://cve.org/CVERecord?id=CVE-2026-63878
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63878.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-63878
- Downstream
- Published
- 2026-07-19T14:54:50.977Z
- Modified
- 2026-07-21T03:46:59.771564262Z
- Summary
- drm/amdgpu: check num_entries in GEM_OP GET_MAPPING_INFO
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu: check numentries in GEMOP GETMAPPINGINFO
kvcalloc(args->numentries, sizeof(*vmentries), GFPKERNEL) at amdgpugem.c:1050 uses the user-supplied numentries directly without any upper bounds check. Since numentries is a __u32 and sizeof(drmamdgpugemvmentry) is 32 bytes, a large numentries produces an allocation exceeding INTMAX, triggering WARNING in __kvmallocnodenoprof(), causing a kernel WARNING, TAINTWARN, and panic on CONFIGPANICONWARN=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)
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63878.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/967a00b8e06a7734aded23861faba9ee2462be87
- https://git.kernel.org/stable/c/a1ba4594232c87c3b8defd6f89a2e40f8b08395d
- https://git.kernel.org/stable/c/f059b4c493df3e54fe3ffe4658009c31864275da
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63878.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-63878
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git