{"id":"CVE-2026-93118","summary":"usb: gadget: aspeed_udc: check endpoint DMA allocation","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: aspeed_udc: check endpoint DMA allocation\n\nast_udc_probe() allocates a coherent DMA buffer used as the backing store\nfor endpoint buffers. ast_udc_init_ep() derives per-endpoint buffer\npointers from udc-\u003eep0_buf, so a failed allocation is dereferenced during\nprobe.\n\nCheck the allocation before endpoint setup. The existing probe error path\ncalled ast_udc_remove(), which unregisters the gadget unconditionally and\nis not safe before usb_add_gadget_udc() succeeds. Add a local cleanup\nhelper for probe failures so pre-registration failures only unwind the\nresources that were actually initialized.\n\nThis was found by a local static analysis checker for unchecked allocator\nreturns while scanning Linux 6.16. The change was checked by applying it\nto current mainline and by running checkpatch. I do not have access to\nAspeed UDC hardware, so no runtime testing was performed.","modified":"2026-09-19T03:47:31.527342430Z","published":"2026-09-17T16:11:25.186Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93118.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/4aaad88f857498ed1294f061f0b25d27ae891c55"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6182e708e2e1f55521c8a01d7535630ecc2d7df9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/97cee53a94be3bd4fd8fbed6071bd2f32dad1ab1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9e6f57107c1886052d4baaa047a2bc3d0e91be5d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d7ae1a48e70e9c3451b7dc7bc3896c82884bc4df"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ff6e88e29965bd06f640e59acdcf0bbf04a7f55c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93118.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93118"},{"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":"055276c1320564b0192b3af323b8cc67f9b665e1"},{"fixed":"d7ae1a48e70e9c3451b7dc7bc3896c82884bc4df"},{"fixed":"4aaad88f857498ed1294f061f0b25d27ae891c55"},{"fixed":"6182e708e2e1f55521c8a01d7535630ecc2d7df9"},{"fixed":"ff6e88e29965bd06f640e59acdcf0bbf04a7f55c"},{"fixed":"9e6f57107c1886052d4baaa047a2bc3d0e91be5d"},{"fixed":"97cee53a94be3bd4fd8fbed6071bd2f32dad1ab1"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93118.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93118.json"}}],"schema_version":"1.9.0"}