CVE-2026-93118: Linux kernel · usb: gadget: aspeed_udc: check endpoint DMA allocation
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in ff6e88e29965bd06f640e59acdcf0bbf04a7f55c : update Linux kernel when convenient.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in ff6e88e29965bd06f640e59acdcf0bbf04a7f55c, d7ae1a48e70e9c3451b7dc7bc3896c82884bc4df, 6182e708e2e1f55521c8a01d7535630ecc2d7df9 +3
Exploitation evidence
Disclosed: evidence found.
CVE published 17 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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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.
References
- git.kernel.org/stable/c/d7ae1a48e70e9c3451b7dc7bc3896c82884bc4df (opens in a new tab)
- git.kernel.org/stable/c/4aaad88f857498ed1294f061f0b25d27ae891c55 (opens in a new tab)
- git.kernel.org/stable/c/6182e708e2e1f55521c8a01d7535630ecc2d7df9 (opens in a new tab)
- git.kernel.org/stable/c/ff6e88e29965bd06f640e59acdcf0bbf04a7f55c (opens in a new tab)
- git.kernel.org/stable/c/9e6f57107c1886052d4baaa047a2bc3d0e91be5d (opens in a new tab)
- git.kernel.org/stable/c/97cee53a94be3bd4fd8fbed6071bd2f32dad1ab1 (opens in a new tab)