{"id":"CVE-2026-74443","summary":"drm/vmwgfx: bound DMA command body size against suffix pointer","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: bound DMA command body size against suffix pointer\n\nvmw_cmd_dma() locates the DMA suffix at\n\n\t(unsigned long) &cmd-\u003ebody + header-\u003esize - sizeof(*suffix)\n\nwithout checking that header-\u003esize is large enough to contain both\ncmd-\u003ebody and the suffix.  An undersized header makes the suffix\npointer underflow back into the previous command in the bounce\nbuffer.  The verifier later writes suffix-\u003emaximumOffset, clobbering\nverified fields of an already-relocated earlier command -- a TOCTOU\non the device-visible command stream that lets one command rewrite\nanother's GMR id, surface id, or other authenticated fields.\n\nReject the command if the body is too small for the suffix to fit.","modified":"2026-08-17T03:55:03.960915439Z","published":"2026-08-15T12:26:50.826Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74443.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/036e16ada95389bdc30f41068af04c1d0872fad0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7e40e6120fb232a10b543ffd994e5c6d8f3a2cc6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9759da60e38d7b9db44dc92713e4e0391883d221"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d5d7ada4e1296b00d89fe82b2ca850cc7809d6f7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f4f1db96bfd68b81053693ba53405b6f510ac16c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74443.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74443"},{"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":"4e4ddd47774313accc86b233d6ca2c6a9037a671"},{"fixed":"036e16ada95389bdc30f41068af04c1d0872fad0"},{"fixed":"d5d7ada4e1296b00d89fe82b2ca850cc7809d6f7"},{"fixed":"7e40e6120fb232a10b543ffd994e5c6d8f3a2cc6"},{"fixed":"9759da60e38d7b9db44dc92713e4e0391883d221"},{"fixed":"f4f1db96bfd68b81053693ba53405b6f510ac16c"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74443.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.33"},{"fixed":"6.6.151"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.103"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.44"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74443.json"}}],"schema_version":"1.9.0"}