{"api_version":"1","generated_at":"2026-07-22T03:04:59+00:00","cve":"CVE-2026-63878","urls":{"html":"https://cve.report/CVE-2026-63878","api":"https://cve.report/api/cve/CVE-2026-63878.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-63878","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63878"},"summary":{"title":"drm/amdgpu: check num_entries in GEM_OP GET_MAPPING_INFO","description":"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->num_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)","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 16:17:04","updated_at":"2026-07-19 16:17:04"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/967a00b8e06a7734aded23861faba9ee2462be87","name":"https://git.kernel.org/stable/c/967a00b8e06a7734aded23861faba9ee2462be87","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f059b4c493df3e54fe3ffe4658009c31864275da","name":"https://git.kernel.org/stable/c/f059b4c493df3e54fe3ffe4658009c31864275da","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a1ba4594232c87c3b8defd6f89a2e40f8b08395d","name":"https://git.kernel.org/stable/c/a1ba4594232c87c3b8defd6f89a2e40f8b08395d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63878","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63878","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4d82724f7f2b847eb0454b1aab5450545b39abd4 f059b4c493df3e54fe3ffe4658009c31864275da git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4d82724f7f2b847eb0454b1aab5450545b39abd4 967a00b8e06a7734aded23861faba9ee2462be87 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4d82724f7f2b847eb0454b1aab5450545b39abd4 a1ba4594232c87c3b8defd6f89a2e40f8b08395d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.35 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.12 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"63878","cve":"CVE-2026-63878","epss":"0.001980000","percentile":"0.097910000","score_date":"2026-07-20","updated_at":"2026-07-21 00:13:14"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f059b4c493df3e54fe3ffe4658009c31864275da","status":"affected","version":"4d82724f7f2b847eb0454b1aab5450545b39abd4","versionType":"git"},{"lessThan":"967a00b8e06a7734aded23861faba9ee2462be87","status":"affected","version":"4d82724f7f2b847eb0454b1aab5450545b39abd4","versionType":"git"},{"lessThan":"a1ba4594232c87c3b8defd6f89a2e40f8b08395d","status":"affected","version":"4d82724f7f2b847eb0454b1aab5450545b39abd4","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.18"},{"lessThan":"6.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.35","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.35","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.12","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"6.18","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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->num_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)"}],"providerMetadata":{"dateUpdated":"2026-07-19T14:54:50.977Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/f059b4c493df3e54fe3ffe4658009c31864275da"},{"url":"https://git.kernel.org/stable/c/967a00b8e06a7734aded23861faba9ee2462be87"},{"url":"https://git.kernel.org/stable/c/a1ba4594232c87c3b8defd6f89a2e40f8b08395d"}],"title":"drm/amdgpu: check num_entries in GEM_OP GET_MAPPING_INFO","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-63878","datePublished":"2026-07-19T14:54:50.977Z","dateReserved":"2026-07-19T07:54:57.018Z","dateUpdated":"2026-07-19T14:54:50.977Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 16:17:04","lastModifiedDate":"2026-07-19 16:17:04","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"63878","Ordinal":"1","Title":"drm/amdgpu: check num_entries in GEM_OP GET_MAPPING_INFO","CVE":"CVE-2026-63878","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"63878","Ordinal":"1","NoteData":"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->num_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)","Type":"Description","Title":"drm/amdgpu: check num_entries in GEM_OP GET_MAPPING_INFO"}]}}}