Vulnerability-Lookup

GHSA-CVJV-6HMM-J2VV

Vulnerability from github – Published: 2026-08-15 15:30 – Updated: 2026-08-19 18:32

Details

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.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-74464"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T13:17:51Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: openvswitch: fix skb leak on flow key update failure during ct\n\novs_ct_execute() always steals or frees the skb on failure while\novs_flow_key_update() does not.  So, if it fails and we return right\naway, the skb ends up leaked.\n\nFix that by breaking instead and letting the common error handling\ncode at the bottom of the loop to free the skb properly.\n\nThis is a very unlikely scenario as it requires the packet to become\nunparseable by applying a set of actions on a previously parseable skb,\nbut should be fixed nevertheless.\n\nReported by Sashiko.",
  "id": "GHSA-cvjv-6hmm-j2vv",
  "modified": "2026-08-19T18:32:28Z",
  "published": "2026-08-15T15:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74464"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/22e0ca88090d89c128078062186b03bb5fdc4f98"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/393f3c72600ab6721d732a0ab245bc896c5b28fc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6cc523eaee72c4e91894136cff64946ae9de2cda"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/736e972f3f8a304158345223ac6e816166a467ce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b77126b2915900f69f9fcf5d624a77c8e6d50c31"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bc62e843bc48f933da765ce47079fd992e535794"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e0ba8eaef2a0d02a7a485e6a7157e47272b65cea"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e84dfaac50aab45ad8c670da43e3aa1f97bd2a41"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2026-08-15 12:27 – Updated: 2026-08-19 16:37

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

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/b77126b2915900f69…
https://git.kernel.org/stable/c/6cc523eaee72c4e91…
https://git.kernel.org/stable/c/22e0ca88090d89c12…
https://git.kernel.org/stable/c/736e972f3f8a30415…
https://git.kernel.org/stable/c/e84dfaac50aab45ad…
https://git.kernel.org/stable/c/e0ba8eaef2a0d02a7…
https://git.kernel.org/stable/c/393f3c72600ab6721…
https://git.kernel.org/stable/c/bc62e843bc48f933d…

Impacted products

2 products

Vendor	Product	Version
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)
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)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/openvswitch/actions.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b77126b2915900f69f9fcf5d624a77c8e6d50c31",
              "status": "affected",
              "version": "ec0d043d05e6e3c0c2fac5de922c800c027c6386",
              "versionType": "git"
            },
            {
              "lessThan": "6cc523eaee72c4e91894136cff64946ae9de2cda",
              "status": "affected",
              "version": "ec0d043d05e6e3c0c2fac5de922c800c027c6386",
              "versionType": "git"
            },
            {
              "lessThan": "22e0ca88090d89c128078062186b03bb5fdc4f98",
              "status": "affected",
              "version": "ec0d043d05e6e3c0c2fac5de922c800c027c6386",
              "versionType": "git"
            },
            {
              "lessThan": "736e972f3f8a304158345223ac6e816166a467ce",
              "status": "affected",
              "version": "ec0d043d05e6e3c0c2fac5de922c800c027c6386",
              "versionType": "git"
            },
            {
              "lessThan": "e84dfaac50aab45ad8c670da43e3aa1f97bd2a41",
              "status": "affected",
              "version": "ec0d043d05e6e3c0c2fac5de922c800c027c6386",
              "versionType": "git"
            },
            {
              "lessThan": "e0ba8eaef2a0d02a7a485e6a7157e47272b65cea",
              "status": "affected",
              "version": "ec0d043d05e6e3c0c2fac5de922c800c027c6386",
              "versionType": "git"
            },
            {
              "lessThan": "393f3c72600ab6721d732a0ab245bc896c5b28fc",
              "status": "affected",
              "version": "ec0d043d05e6e3c0c2fac5de922c800c027c6386",
              "versionType": "git"
            },
            {
              "lessThan": "bc62e843bc48f933da765ce47079fd992e535794",
              "status": "affected",
              "version": "ec0d043d05e6e3c0c2fac5de922c800c027c6386",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/openvswitch/actions.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.3"
            },
            {
              "lessThan": "4.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.151",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.265",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.216",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.151",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.103",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.44",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.8",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: openvswitch: fix skb leak on flow key update failure during ct\n\novs_ct_execute() always steals or frees the skb on failure while\novs_flow_key_update() does not.  So, if it fails and we return right\naway, the skb ends up leaked.\n\nFix that by breaking instead and letting the common error handling\ncode at the bottom of the loop to free the skb properly.\n\nThis is a very unlikely scenario as it requires the packet to become\nunparseable by applying a set of actions on a previously parseable skb,\nbut should be fixed nevertheless.\n\nReported by Sashiko."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:37:05.367Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b77126b2915900f69f9fcf5d624a77c8e6d50c31"
        },
        {
          "url": "https://git.kernel.org/stable/c/6cc523eaee72c4e91894136cff64946ae9de2cda"
        },
        {
          "url": "https://git.kernel.org/stable/c/22e0ca88090d89c128078062186b03bb5fdc4f98"
        },
        {
          "url": "https://git.kernel.org/stable/c/736e972f3f8a304158345223ac6e816166a467ce"
        },
        {
          "url": "https://git.kernel.org/stable/c/e84dfaac50aab45ad8c670da43e3aa1f97bd2a41"
        },
        {
          "url": "https://git.kernel.org/stable/c/e0ba8eaef2a0d02a7a485e6a7157e47272b65cea"
        },
        {
          "url": "https://git.kernel.org/stable/c/393f3c72600ab6721d732a0ab245bc896c5b28fc"
        },
        {
          "url": "https://git.kernel.org/stable/c/bc62e843bc48f933da765ce47079fd992e535794"
        }
      ],
      "title": "net: openvswitch: fix skb leak on flow key update failure during ct",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74464",
    "datePublished": "2026-08-15T12:27:03.786Z",
    "dateReserved": "2026-08-15T05:44:03.901Z",
    "dateUpdated": "2026-08-19T16:37:05.367Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

GHSA-CVJV-6HMM-J2VV

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

Tags

Sightings

Nomenclature

Related by attack behaviour