Vulnerability-Lookup

GHSA-RHV7-MR5P-CGR8

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-05-27 15:33

Details

In the Linux kernel, the following vulnerability has been resolved:

ipvs: do not keep dest_dst if dev is going down

There is race between the netdev notifier ip_vs_dst_event() and the code that caches dst with dev that is going down. As the FIB can be notified for the closed device after our handler finishes, it is possible valid route to be returned and cached resuling in a leaked dev reference until the dest is not removed.

To prevent new dest_dst to be attached to dest just after the handler dropped the old one, add a netif_running() check to make sure the notifier handler is not currently running for device that is closing.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-45917"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:06Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: do not keep dest_dst if dev is going down\n\nThere is race between the netdev notifier ip_vs_dst_event()\nand the code that caches dst with dev that is going down.\nAs the FIB can be notified for the closed device after our\nhandler finishes, it is possible valid route to be returned\nand cached resuling in a leaked dev reference until the dest\nis not removed.\n\nTo prevent new dest_dst to be attached to dest just after the\nhandler dropped the old one, add a netif_running() check\nto make sure the notifier handler is not currently running\nfor device that is closing.",
  "id": "GHSA-rhv7-mr5p-cgr8",
  "modified": "2026-05-27T15:33:16Z",
  "published": "2026-05-27T15:33:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45917"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/024eb0bd19f507e6e7f0c7a7e5506d66b5dc1d3e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/64af43033503458c46023e56d6ae7bb0f824b55f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8fde939b0206afc1d5846217a01a16b9bc8c7896"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bae53b3baf2ff2f45f9205c438818fc055601a54"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-45917 (GCVE-0-2026-45917)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:17 – Updated: 2026-05-27 12:17

Title

ipvs: do not keep dest_dst if dev is going down

Summary

In the Linux kernel, the following vulnerability has been resolved: ipvs: do not keep dest_dst if dev is going down There is race between the netdev notifier ip_vs_dst_event() and the code that caches dst with dev that is going down. As the FIB can be notified for the closed device after our handler finishes, it is possible valid route to be returned and cached resuling in a leaked dev reference until the dest is not removed. To prevent new dest_dst to be attached to dest just after the handler dropped the old one, add a netif_running() check to make sure the notifier handler is not currently running for device that is closing.

Severity

No CVSS data available.

Assigner

Linux

References

4 references

URL	Tags
https://git.kernel.org/stable/c/64af43033503458c4…
https://git.kernel.org/stable/c/bae53b3baf2ff2f45…
https://git.kernel.org/stable/c/024eb0bd19f507e6e…
https://git.kernel.org/stable/c/8fde939b0206afc1d…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 7a4f0761fce32ff4918a7c23b08db564ad33092d , < 64af43033503458c46023e56d6ae7bb0f824b55f (git) Affected: 7a4f0761fce32ff4918a7c23b08db564ad33092d , < bae53b3baf2ff2f45f9205c438818fc055601a54 (git) Affected: 7a4f0761fce32ff4918a7c23b08db564ad33092d , < 024eb0bd19f507e6e7f0c7a7e5506d66b5dc1d3e (git) Affected: 7a4f0761fce32ff4918a7c23b08db564ad33092d , < 8fde939b0206afc1d5846217a01a16b9bc8c7896 (git)
Linux	Linux	Affected: 2.6.39 Unaffected: 0 , < 2.6.39 (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.14 , ≤ 6.18.* (semver) Unaffected: 6.19.4 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/ipvs/ip_vs_xmit.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "64af43033503458c46023e56d6ae7bb0f824b55f",
              "status": "affected",
              "version": "7a4f0761fce32ff4918a7c23b08db564ad33092d",
              "versionType": "git"
            },
            {
              "lessThan": "bae53b3baf2ff2f45f9205c438818fc055601a54",
              "status": "affected",
              "version": "7a4f0761fce32ff4918a7c23b08db564ad33092d",
              "versionType": "git"
            },
            {
              "lessThan": "024eb0bd19f507e6e7f0c7a7e5506d66b5dc1d3e",
              "status": "affected",
              "version": "7a4f0761fce32ff4918a7c23b08db564ad33092d",
              "versionType": "git"
            },
            {
              "lessThan": "8fde939b0206afc1d5846217a01a16b9bc8c7896",
              "status": "affected",
              "version": "7a4f0761fce32ff4918a7c23b08db564ad33092d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/ipvs/ip_vs_xmit.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.39"
            },
            {
              "lessThan": "2.6.39",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.75",
                  "versionStartIncluding": "2.6.39",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.14",
                  "versionStartIncluding": "2.6.39",
                  "vulnerable": true
                },
                {
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "2.6.39",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: do not keep dest_dst if dev is going down\n\nThere is race between the netdev notifier ip_vs_dst_event()\nand the code that caches dst with dev that is going down.\nAs the FIB can be notified for the closed device after our\nhandler finishes, it is possible valid route to be returned\nand cached resuling in a leaked dev reference until the dest\nis not removed.\n\nTo prevent new dest_dst to be attached to dest just after the\nhandler dropped the old one, add a netif_running() check\nto make sure the notifier handler is not currently running\nfor device that is closing."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:17:33.337Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/64af43033503458c46023e56d6ae7bb0f824b55f"
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          "url": "https://git.kernel.org/stable/c/bae53b3baf2ff2f45f9205c438818fc055601a54"
        },
        {
          "url": "https://git.kernel.org/stable/c/024eb0bd19f507e6e7f0c7a7e5506d66b5dc1d3e"
        },
        {
          "url": "https://git.kernel.org/stable/c/8fde939b0206afc1d5846217a01a16b9bc8c7896"
        }
      ],
      "title": "ipvs: do not keep dest_dst if dev is going down",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-45917",
    "datePublished": "2026-05-27T12:17:33.337Z",
    "dateReserved": "2026-05-13T15:03:33.085Z",
    "dateUpdated": "2026-05-27T12:17:33.337Z",
    "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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-RHV7-MR5P-CGR8

CVE-2026-45917 (GCVE-0-2026-45917)

Tags

Sightings

Nomenclature