{"id":"CVE-2026-93118","title":"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","summary":"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(…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 055276c1320564b0192b3af323b8cc67f9b665e1 < d7ae1a48e70e9c3451b7dc7bc3896c82884bc4df","Linux >= 055276c1320564b0192b3af323b8cc67f9b665e1 < 4aaad88f857498ed1294f061f0b25d27ae891c55","Linux >= 055276c1320564b0192b3af323b8cc67f9b665e1 < 6182e708e2e1f55521c8a01d7535630ecc2d7df9","Linux >= 055276c1320564b0192b3af323b8cc67f9b665e1 < ff6e88e29965bd06f640e59acdcf0bbf04a7f55c","Linux >= 055276c1320564b0192b3af323b8cc67f9b665e1 < 9e6f57107c1886052d4baaa047a2bc3d0e91be5d","Linux >= 055276c1320564b0192b3af323b8cc67f9b665e1 < 97cee53a94be3bd4fd8fbed6071bd2f32dad1ab1","Linux 6.0"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:18:06.427","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93118","references":[{"url":"https://git.kernel.org/stable/c/4aaad88f857498ed1294f061f0b25d27ae891c55","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6182e708e2e1f55521c8a01d7535630ecc2d7df9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/97cee53a94be3bd4fd8fbed6071bd2f32dad1ab1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9e6f57107c1886052d4baaa047a2bc3d0e91be5d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d7ae1a48e70e9c3451b7dc7bc3896c82884bc4df","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ff6e88e29965bd06f640e59acdcf0bbf04a7f55c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.751Z","epss":0.00173,"epssPercentile":0.06991,"slug":"CVE-2026-93118","body":"## Overview\n\nIn 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->ep0_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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}