CVE-2026-74464 (GCVE-0-2026-74464)

Vulnerability from cvelistv5 – Published: 2026-08-15 12:27 – Updated: 2026-08-19 16:37
VLAI
Title
net: openvswitch: fix skb leak on flow key update failure during ct
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ec0d043d05e6e3c0c2fac5de922c800c027c6386 , < b77126b2915900f69f9fcf5d624a77c8e6d50c31 (git)
Affected: ec0d043d05e6e3c0c2fac5de922c800c027c6386 , < 6cc523eaee72c4e91894136cff64946ae9de2cda (git)
Affected: ec0d043d05e6e3c0c2fac5de922c800c027c6386 , < 22e0ca88090d89c128078062186b03bb5fdc4f98 (git)
Affected: ec0d043d05e6e3c0c2fac5de922c800c027c6386 , < 736e972f3f8a304158345223ac6e816166a467ce (git)
Affected: ec0d043d05e6e3c0c2fac5de922c800c027c6386 , < e84dfaac50aab45ad8c670da43e3aa1f97bd2a41 (git)
Affected: ec0d043d05e6e3c0c2fac5de922c800c027c6386 , < e0ba8eaef2a0d02a7a485e6a7157e47272b65cea (git)
Affected: ec0d043d05e6e3c0c2fac5de922c800c027c6386 , < 393f3c72600ab6721d732a0ab245bc896c5b28fc (git)
Affected: ec0d043d05e6e3c0c2fac5de922c800c027c6386 , < bc62e843bc48f933da765ce47079fd992e535794 (git)
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Linux Linux Affected: 4.3
Unaffected: 0 , < 4.3 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.151 , ≤ 6.6.* (semver)
Unaffected: 6.12.103 , ≤ 6.12.* (semver)
Unaffected: 6.18.44 , ≤ 6.18.* (semver)
Unaffected: 7.1.8 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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        }
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      "providerMetadata": {
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    "dateReserved": "2026-08-15T05:44:03.901Z",
    "dateUpdated": "2026-08-19T16:37:05.367Z",
    "state": "PUBLISHED"
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      "title": "net: openvswitch: fix skb leak on flow key update failure during ct",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-74464.json",
      "version": "1"
    },
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-17T14:55:30+00:00",
      "cve": "CVE-2026-74464",
      "id": "CVE-2026-74464",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: openvswitch: fix skb leak on flow key update failure during ct",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74464.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-18T16:54:17Z",
      "cve": "CVE-2026-74464",
      "id": "CVE-2026-74464",
      "initial_release_date": "2026-08-15T23:52:31Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-74464",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-74464.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.