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VulnerabilityPublished

CVE-2026-63928: Linux kernel · USB: serial: omninet: fix memory corruption with small endpoint

Affects Linux kernelSource GCVE Database

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Not known to be exploited.

Data as of 30 Oct 2026, 15:48 UTC

Severity
High

Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 19 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

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