CVE-2026-74464
net: openvswitch: fix skb leak on flow key update failure during ct
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.
INFO
Published Date :
Aug. 15, 2026, 1:17 p.m.
Last Modified :
Aug. 15, 2026, 1:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Apply kernel patches for Open vSwitch.
- Update the Linux kernel to a fixed version.
- Ensure proper skb handling on error.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-74464.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74464 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-74464
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-74464 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74464 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'ec0d043d05e6e3c0c2fac5de922c800c027c6386', 'lessThan': '736e972f3f8a304158345223ac6e816166a467ce', 'versionType': 'git'}, {'status': 'affected', 'version': 'ec0d043d05e6e3c0c2fac5de922c800c027c6386', 'lessThan': 'e84dfaac50aab45ad8c670da43e3aa1f97bd2a41', 'versionType': 'git'}, {'status': 'affected', 'version': 'ec0d043d05e6e3c0c2fac5de922c800c027c6386', 'lessThan': 'e0ba8eaef2a0d02a7a485e6a7157e47272b65cea', 'versionType': 'git'}, {'status': 'affected', 'version': 'ec0d043d05e6e3c0c2fac5de922c800c027c6386', 'lessThan': '393f3c72600ab6721d732a0ab245bc896c5b28fc', 'versionType': 'git'}, {'status': 'affected', 'version': 'ec0d043d05e6e3c0c2fac5de922c800c027c6386', 'lessThan': 'bc62e843bc48f933da765ce47079fd992e535794', 'versionType': 'git'}], 'programFiles': ['net/openvswitch/actions.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.3'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.3', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/openvswitch/actions.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/393f3c72600ab6721d732a0ab245bc896c5b28fc Added Reference https://git.kernel.org/stable/c/736e972f3f8a304158345223ac6e816166a467ce Added Reference https://git.kernel.org/stable/c/bc62e843bc48f933da765ce47079fd992e535794 Added Reference https://git.kernel.org/stable/c/e0ba8eaef2a0d02a7a485e6a7157e47272b65cea Added Reference https://git.kernel.org/stable/c/e84dfaac50aab45ad8c670da43e3aa1f97bd2a41