CVE-2026-74464: net: openvswitch: fix skb leak on flow key update failure during ct
Vulnerability summary
CVE-2026-74464 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.2% of scored vulnerabilities.
No CVSS vector published; no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 21 · Related 18Timeline
- 15-08-2026PublishedVulnerability first disclosed.
- 19-08-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
Risk metrics not yet published.
EPSS trend
Probability
0.18%
Chance of exploitation in the next 30 days
Percentile
7%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.18% on 06-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: not stated in public data.
Ubuntu169 products
- linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 7.0.0-42.42
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 7.0.0-1016.17
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian2 products
- linux< 6.1.187-1 | < 6.12.105-1 | < 7.1.8-1
- linux-6.12< 6.12.107-1~deb12u1
Linux1 product
- linux≥ ec0d043d05e6e3c0c2fac5de922c800c027c6386, < b77126b2915900f69f9fcf5d624a77c8e6d50c31 | ≥ ec0d043d05e6e3c0c2fac5de922c800c027c6386, < 6cc523eaee72c4e91894136cff64946ae9de2cda | ≥ ec0d043d05e6e3c0c2fac5de922c800c027c6386, < 22e0ca88090d89c128078062186b03bb5fdc4f98 | ≥ ec0d043d05e6e3c0c2fac5de922c800c027c6386, < 736e972f3f8a304158345223ac6e816166a467ce | ≥ ec0d043d05e6e3c0c2fac5de922c800c027c6386, < e84dfaac50aab45ad8c670da43e3aa1f97bd2a41 | ≥ ec0d043d05e6e3c0c2fac5de922c800c027c6386, < e0ba8eaef2a0d02a7a485e6a7157e47272b65cea | ≥ ec0d043d05e6e3c0c2fac5de922c800c027c6386, < 393f3c72600ab6721d732a0ab245bc896c5b28fc | ≥ ec0d043d05e6e3c0c2fac5de922c800c027c6386, < bc62e843bc48f933da765ce47079fd992e535794 | 4.3
3 vendors · 172 products
