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CVE-2026-93118

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Last modified

CVE-2026-93118 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: usb: gadget: aspeed_udc: check endpoint DMA allocation ast_udc_probe() allocates a coherent DMA buffer used as the backing store for endpoint buffers. ast_udc_init_ep() derives per-endpoint buffer pointers from udc->ep0_buf, so a failed allocation is dereferenced during probe. Check the allocation before endpoint setup.

Description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: aspeed_udc: check endpoint DMA allocation ast_udc_probe() allocates a coherent DMA buffer used as the backing store for endpoint buffers. ast_udc_init_ep() derives per-endpoint buffer pointers from udc->ep0_buf, so a failed allocation is dereferenced during probe. Check the allocation before endpoint setup. The existing probe error path called ast_udc_remove(), which unregisters the gadget unconditionally and is not safe before usb_add_gadget_udc() succeeds. Add a local cleanup helper for probe failures so pre-registration failures only unwind the resources that were actually initialized. This was found by a local static analysis checker for unchecked allocator returns while scanning Linux 6.16. The change was checked by applying it to current mainline and by running checkpatch. I do not have access to Aspeed UDC hardware, so no runtime testing was performed.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 055276c1320564b0192b3af323b8cc67f9b665e1, < d7ae1a48e70e9c3451b7dc7bc3896c82884bc4df; >= 055276c1320564b0192b3af323b8cc67f9b665e1, < 4aaad88f857498ed1294f061f0b25d27ae891c55; >= 055276c1320564b0192b3af323b8cc67f9b665e1, < 6182e708e2e1f55521c8a01d7535630ecc2d7df9; >= 055276c1320564b0192b3af323b8cc67f9b665e1, < ff6e88e29965bd06f640e59acdcf0bbf04a7f55c; >= 055276c1320564b0192b3af323b8cc67f9b665e1, < 9e6f57107c1886052d4baaa047a2bc3d0e91be5d; >= 055276c1320564b0192b3af323b8cc67f9b665e1, < 97cee53a94be3bd4fd8fbed6071bd2f32dad1ab1
LinuxLinux6.0

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-93118?
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: aspeed_udc: check endpoint DMA allocation ast_udc_probe() allocates a coherent DMA buffer used as the backing store for endpoint buffers. ast_udc_init_ep() derives per-endpoint buffer pointers from udc->ep0_buf, so a failed allocation is dereferenced during probe. Check the allocation before endpoint setup. The existing probe error path called ast_udc_remove(), which unregisters the gadget unconditionally and is not safe before usb_add_gadget_udc() succeeds. Add a local cleanup helper for probe failures so pre-registration failures only unwind the resources that were actually initialized. This was found by a local static analysis checker for unchecked allocator returns while scanning Linux 6.16. The change was checked by applying it to current mainline and by running checkpatch. I do not have access to Aspeed UDC hardware, so no runtime testing was performed.
How severe is CVE-2026-93118?
Severity scoring for CVE-2026-93118 is pending analysis.
How do I fix CVE-2026-93118?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST