{"id":"CVE-2026-93118","state":"PUBLISHED","title":"usb: gadget: aspeed_udc: check endpoint DMA allocation","description":"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->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.","publishedAt":"2026-09-17T16:11:25.186Z","updatedAt":"2026-10-19T09:05:51.880Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"055276c1320564b0192b3af323b8cc67f9b665e1","status":"affected","lessThan":"d7ae1a48e70e9c3451b7dc7bc3896c82884bc4df","versionType":"git"},{"version":"055276c1320564b0192b3af323b8cc67f9b665e1","status":"affected","lessThan":"4aaad88f857498ed1294f061f0b25d27ae891c55","versionType":"git"},{"version":"055276c1320564b0192b3af323b8cc67f9b665e1","status":"affected","lessThan":"6182e708e2e1f55521c8a01d7535630ecc2d7df9","versionType":"git"},{"version":"055276c1320564b0192b3af323b8cc67f9b665e1","status":"affected","lessThan":"ff6e88e29965bd06f640e59acdcf0bbf04a7f55c","versionType":"git"},{"version":"055276c1320564b0192b3af323b8cc67f9b665e1","status":"affected","lessThan":"9e6f57107c1886052d4baaa047a2bc3d0e91be5d","versionType":"git"},{"version":"055276c1320564b0192b3af323b8cc67f9b665e1","status":"affected","lessThan":"97cee53a94be3bd4fd8fbed6071bd2f32dad1ab1","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/udc/aspeed_udc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/udc/aspeed_udc.c"]}],"references":["https://git.kernel.org/stable/c/d7ae1a48e70e9c3451b7dc7bc3896c82884bc4df","https://git.kernel.org/stable/c/4aaad88f857498ed1294f061f0b25d27ae891c55","https://git.kernel.org/stable/c/6182e708e2e1f55521c8a01d7535630ecc2d7df9","https://git.kernel.org/stable/c/ff6e88e29965bd06f640e59acdcf0bbf04a7f55c","https://git.kernel.org/stable/c/9e6f57107c1886052d4baaa047a2bc3d0e91be5d","https://git.kernel.org/stable/c/97cee53a94be3bd4fd8fbed6071bd2f32dad1ab1"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/93xxx/CVE-2026-93118.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-93118","state":"PUBLISHED","datePublished":"2026-09-17T16:11:25.186Z","dateUpdated":"2026-10-19T09:05:51.880Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-17T16:02:15.086Z"},"containers":{"cna":{"title":"usb: gadget: aspeed_udc: check endpoint DMA allocation","descriptions":[{"lang":"en","value":"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->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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"055276c1320564b0192b3af323b8cc67f9b665e1","status":"affected","lessThan":"d7ae1a48e70e9c3451b7dc7bc3896c82884bc4df","versionType":"git"},{"version":"055276c1320564b0192b3af323b8cc67f9b665e1","status":"affected","lessThan":"4aaad88f857498ed1294f061f0b25d27ae891c55","versionType":"git"},{"version":"055276c1320564b0192b3af323b8cc67f9b665e1","status":"affected","lessThan":"6182e708e2e1f55521c8a01d7535630ecc2d7df9","versionType":"git"},{"version":"055276c1320564b0192b3af323b8cc67f9b665e1","status":"affected","lessThan":"ff6e88e29965bd06f640e59acdcf0bbf04a7f55c","versionType":"git"},{"version":"055276c1320564b0192b3af323b8cc67f9b665e1","status":"affected","lessThan":"9e6f57107c1886052d4baaa047a2bc3d0e91be5d","versionType":"git"},{"version":"055276c1320564b0192b3af323b8cc67f9b665e1","status":"affected","lessThan":"97cee53a94be3bd4fd8fbed6071bd2f32dad1ab1","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/udc/aspeed_udc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/udc/aspeed_udc.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/d7ae1a48e70e9c3451b7dc7bc3896c82884bc4df"},{"url":"https://git.kernel.org/stable/c/4aaad88f857498ed1294f061f0b25d27ae891c55"},{"url":"https://git.kernel.org/stable/c/6182e708e2e1f55521c8a01d7535630ecc2d7df9"},{"url":"https://git.kernel.org/stable/c/ff6e88e29965bd06f640e59acdcf0bbf04a7f55c"},{"url":"https://git.kernel.org/stable/c/9e6f57107c1886052d4baaa047a2bc3d0e91be5d"},{"url":"https://git.kernel.org/stable/c/97cee53a94be3bd4fd8fbed6071bd2f32dad1ab1"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:05:51.880Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}