{"api_version":"1","generated_at":"2026-08-12T07:38:34+00:00","cve":"CVE-2026-68445","urls":{"html":"https://cve.report/CVE-2026-68445","api":"https://cve.report/api/cve/CVE-2026-68445.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-68445","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-68445"},"summary":{"title":"drm/vc4: Prevent shader BO mappings from becoming writable","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: Prevent shader BO mappings from becoming writable\n\nvc4_gem_object_mmap() rejects a writable mapping of a validated shader\nBO, but leaves VM_MAYWRITE set.  Userspace can map the BO read-only and\nthen turn it writable with mprotect().\n\nValidated shader BOs must stay read-only: the validator checks the\ninstructions once and the GPU trusts them afterwards.  A writable\nmapping lets userspace rewrite the code after validation, bypassing the\nvalidator.\n\nClear VM_MAYWRITE on the read-only path so the mapping cannot be\nupgraded, as i915 already does for its read-only objects.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-12 00:17:44","updated_at":"2026-08-12 00:17:44"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/6deaa317201851c644c431b57682e54d06b35838","name":"https://git.kernel.org/stable/c/6deaa317201851c644c431b57682e54d06b35838","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9f0ee411fc2d76333d6087c5862ffa907cf7a175","name":"https://git.kernel.org/stable/c/9f0ee411fc2d76333d6087c5862ffa907cf7a175","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/019e6ad247f7fd038d2e009789f6d9bfcccb1ae7","name":"https://git.kernel.org/stable/c/019e6ad247f7fd038d2e009789f6d9bfcccb1ae7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fe168ef1d232d734d9998fd74822e2e20930dfff","name":"https://git.kernel.org/stable/c/fe168ef1d232d734d9998fd74822e2e20930dfff","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0c9e6367639548307d3f578f6943ce72c9d39087","name":"https://git.kernel.org/stable/c/0c9e6367639548307d3f578f6943ce72c9d39087","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-68445","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68445","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 463873d5701427f2964a0b4b72c45f1f14b6df87 9f0ee411fc2d76333d6087c5862ffa907cf7a175 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 463873d5701427f2964a0b4b72c45f1f14b6df87 019e6ad247f7fd038d2e009789f6d9bfcccb1ae7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 463873d5701427f2964a0b4b72c45f1f14b6df87 6deaa317201851c644c431b57682e54d06b35838 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 463873d5701427f2964a0b4b72c45f1f14b6df87 fe168ef1d232d734d9998fd74822e2e20930dfff git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 463873d5701427f2964a0b4b72c45f1f14b6df87 0c9e6367639548307d3f578f6943ce72c9d39087 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.5","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.148 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.101 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.42 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.6 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc5 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/gpu/drm/vc4/vc4_bo.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"9f0ee411fc2d76333d6087c5862ffa907cf7a175","status":"affected","version":"463873d5701427f2964a0b4b72c45f1f14b6df87","versionType":"git"},{"lessThan":"019e6ad247f7fd038d2e009789f6d9bfcccb1ae7","status":"affected","version":"463873d5701427f2964a0b4b72c45f1f14b6df87","versionType":"git"},{"lessThan":"6deaa317201851c644c431b57682e54d06b35838","status":"affected","version":"463873d5701427f2964a0b4b72c45f1f14b6df87","versionType":"git"},{"lessThan":"fe168ef1d232d734d9998fd74822e2e20930dfff","status":"affected","version":"463873d5701427f2964a0b4b72c45f1f14b6df87","versionType":"git"},{"lessThan":"0c9e6367639548307d3f578f6943ce72c9d39087","status":"affected","version":"463873d5701427f2964a0b4b72c45f1f14b6df87","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/gpu/drm/vc4/vc4_bo.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.5"},{"lessThan":"4.5","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.148","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.101","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.42","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc5","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.148","versionStartIncluding":"4.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.101","versionStartIncluding":"4.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.42","versionStartIncluding":"4.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.6","versionStartIncluding":"4.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc5","versionStartIncluding":"4.5","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: Prevent shader BO mappings from becoming writable\n\nvc4_gem_object_mmap() rejects a writable mapping of a validated shader\nBO, but leaves VM_MAYWRITE set.  Userspace can map the BO read-only and\nthen turn it writable with mprotect().\n\nValidated shader BOs must stay read-only: the validator checks the\ninstructions once and the GPU trusts them afterwards.  A writable\nmapping lets userspace rewrite the code after validation, bypassing the\nvalidator.\n\nClear VM_MAYWRITE on the read-only path so the mapping cannot be\nupgraded, as i915 already does for its read-only objects."}],"providerMetadata":{"dateUpdated":"2026-08-12T00:07:36.230Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/9f0ee411fc2d76333d6087c5862ffa907cf7a175"},{"url":"https://git.kernel.org/stable/c/019e6ad247f7fd038d2e009789f6d9bfcccb1ae7"},{"url":"https://git.kernel.org/stable/c/6deaa317201851c644c431b57682e54d06b35838"},{"url":"https://git.kernel.org/stable/c/fe168ef1d232d734d9998fd74822e2e20930dfff"},{"url":"https://git.kernel.org/stable/c/0c9e6367639548307d3f578f6943ce72c9d39087"}],"title":"drm/vc4: Prevent shader BO mappings from becoming writable","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-68445","datePublished":"2026-08-12T00:07:36.230Z","dateReserved":"2026-07-30T09:28:09.394Z","dateUpdated":"2026-08-12T00:07:36.230Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-12 00:17:44","lastModifiedDate":"2026-08-12 00:17:44","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"68445","Ordinal":"1","Title":"drm/vc4: Prevent shader BO mappings from becoming writable","CVE":"CVE-2026-68445","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"68445","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: Prevent shader BO mappings from becoming writable\n\nvc4_gem_object_mmap() rejects a writable mapping of a validated shader\nBO, but leaves VM_MAYWRITE set.  Userspace can map the BO read-only and\nthen turn it writable with mprotect().\n\nValidated shader BOs must stay read-only: the validator checks the\ninstructions once and the GPU trusts them afterwards.  A writable\nmapping lets userspace rewrite the code after validation, bypassing the\nvalidator.\n\nClear VM_MAYWRITE on the read-only path so the mapping cannot be\nupgraded, as i915 already does for its read-only objects.","Type":"Description","Title":"drm/vc4: Prevent shader BO mappings from becoming writable"}]}}}