{"id":"CVE-2026-63878","summary":"drm/amdgpu: check num_entries in GEM_OP GET_MAPPING_INFO","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: check num_entries in GEM_OP GET_MAPPING_INFO\n\nkvcalloc(args-\u003enum_entries, sizeof(*vm_entries), GFP_KERNEL) at\namdgpu_gem.c:1050 uses the user-supplied num_entries directly without\nany upper bounds check. Since num_entries is a __u32 and\nsizeof(drm_amdgpu_gem_vm_entry) is 32 bytes, a large num_entries\nproduces an allocation exceeding INT_MAX, triggering\nWARNING in __kvmalloc_node_noprof(), causing a kernel WARNING,\nTAINT_WARN, and panic on CONFIG_PANIC_ON_WARN=y systems.\n\nAdd a size bounds check before we invoke the kvzalloc() to\nreject oversized num_entries early with -EINVAL.\n\n(cherry picked from commit 1fe7bf5457f6efd7be60b17e23163ba54341d73d)","modified":"2026-07-21T03:46:59.771564262Z","published":"2026-07-19T14:54:50.977Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63878.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/967a00b8e06a7734aded23861faba9ee2462be87"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a1ba4594232c87c3b8defd6f89a2e40f8b08395d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f059b4c493df3e54fe3ffe4658009c31864275da"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63878.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63878"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4d82724f7f2b847eb0454b1aab5450545b39abd4"},{"fixed":"f059b4c493df3e54fe3ffe4658009c31864275da"},{"fixed":"967a00b8e06a7734aded23861faba9ee2462be87"},{"fixed":"a1ba4594232c87c3b8defd6f89a2e40f8b08395d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63878.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.18.0"},{"fixed":"6.18.35"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.12"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63878.json"}}],"schema_version":"1.7.5"}