CVE-2026-74464: net: openvswitch: fix skb leak on flow key update failure during ct
In the Linux kernel, the following vulnerability has been resolved:
net: openvswitch: fix skb leak on flow key update failure during ct
ovsctexecute() always steals or frees the skb on failure while ovsflowkeyupdate() 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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.6.152.1-1
Event History
Frequently Asked Questions
What is the severity of CVE-2026-74464?
CVE-2026-74464 has a severity rating of 12.
What does CVE-2026-74464 affect?
CVE-2026-74464 affects the Linux kernel, specifically the openvswitch component.
How do I fix CVE-2026-74464?
To fix CVE-2026-74464, upgrade to the latest version of the Linux kernel that addresses this vulnerability.
What are the implications of CVE-2026-74464?
CVE-2026-74464 can lead to memory leaks if the flow key update fails during connection tracking.
When was CVE-2026-74464 published?
CVE-2026-74464 was published on August 15, 2026.