{"id":"CVE-2026-80888","summary":"drm/vmwgfx: drop dma_buf reference on foreign-fd prime import","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: drop dma_buf reference on foreign-fd prime import\n\nttm_prime_fd_to_handle() returns -ENOSYS when the imported fd's\ndma_buf-\u003eops do not match the ttm_object_device's ops, but does so\nwithout releasing the reference acquired by dma_buf_get().  Any\nunprivileged renderD client passing a non-vmwgfx prime fd through the\nDRM_VMW_GB_SURFACE_REF{,_EXT} path leaks one dma_buf reference per\ncall and indefinitely pins the foreign exporter's GEM resources.\n\nFunnel the error path through the existing dma_buf_put() so the\nreference is always dropped.","modified":"2026-09-06T03:46:55.266227561Z","published":"2026-09-04T17:11:04.975Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80888.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/4df39eb99bb47d1f24d1952c23b21b10988356bf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/619c3cfa88e09603a13d918f754808db2dda7057"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a1e972fa94c3a8069e022c67b9d97c7aa7b05293"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a8434b145b1e467940334c58c00af241e9494c5f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c1c22fca0a0896a452a7cb92422d67babd65b4be"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f739416dc555fa205a785e5135d73fa39b26f35d"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80888.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80888"},{"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":"65981f7681abdf92b25942222b629b9c512d0705"},{"fixed":"619c3cfa88e09603a13d918f754808db2dda7057"},{"fixed":"c1c22fca0a0896a452a7cb92422d67babd65b4be"},{"fixed":"a1e972fa94c3a8069e022c67b9d97c7aa7b05293"},{"fixed":"a8434b145b1e467940334c58c00af241e9494c5f"},{"fixed":"4df39eb99bb47d1f24d1952c23b21b10988356bf"},{"fixed":"f739416dc555fa205a785e5135d73fa39b26f35d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80888.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.13.0"},{"fixed":"6.1.183"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"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-2026-80888.json"}}],"schema_version":"1.9.0"}