CVE-2026-63928: Linux kernel · USB: serial: omninet: fix memory corruption with small endpoint
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 30 Oct 2026, 15:48 UTC
Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 19 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 30 Oct 2026.
What to do
AI-suggested
A fix has been implemented in the Linux kernel to ensure bulk-out buffers are sufficiently sized to prevent memory corruption. Users should update to the fixed kernel version once available. No additional mitigations are indicated.
Description
A memory corruption vulnerability in the Linux kernel's USB serial omninet driver was fixed. The issue involved insufficient buffer sizes for bulk-out transfers when a malicious USB device reports a smaller endpoint max packet size than expected, potentially leading to user-controlled slab corruption.
References
- git.kernel.org/stable/c/180996f0ca774001944e4afa452d569ba2f6455c (opens in a new tab)
- git.kernel.org/stable/c/b496e25ead5976bce2891dacaed09beb53a54f9f (opens in a new tab)
- git.kernel.org/stable/c/4e7d32189d6219beb7db37cd0ea36b6bac7dfedb (opens in a new tab)
- git.kernel.org/stable/c/9a3860454bdfb765f936965e975c594352602ffc (opens in a new tab)
- git.kernel.org/stable/c/0bda1893e4cc4ad2b7dcdbaca246f2af688c6c2a (opens in a new tab)
- git.kernel.org/stable/c/0fee0ccac29e088d4bfab7e2d075725dcecd803d (opens in a new tab)
- git.kernel.org/stable/c/f34cf2928387fba01a78381f3258c7e1428897d9 (opens in a new tab)
- git.kernel.org/stable/c/60df93d30f9bdd27db17c4d80ed80ef718d7226b (opens in a new tab)