Vulnerability-Lookup

GHSA-7QWQ-2HRF-8F6G

Vulnerability from github – Published: 2026-04-22 15:31 – Updated: 2026-04-28 15:30

Details

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

netfilter: nf_conntrack_expect: skip expectations in other netns via proc

Skip expectations that do not reside in this netns.

Similar to e77e6ff502ea ("netfilter: conntrack: do not dump other netns's conntrack entries via proc").

Severity ?

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-31496"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-22T14:16:47Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_expect: skip expectations in other netns via proc\n\nSkip expectations that do not reside in this netns.\n\nSimilar to e77e6ff502ea (\"netfilter: conntrack: do not dump other netns\u0027s\nconntrack entries via proc\").",
  "id": "GHSA-7qwq-2hrf-8f6g",
  "modified": "2026-04-28T15:30:47Z",
  "published": "2026-04-22T15:31:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31496"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/168145c87444619e3e649322bbe7719ecd00d411"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2028405ea6987b4448784e439413202cfe19f43f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3265ad619987cb551edaf797ed056d80ac450225"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3db5647984de03d9cae0dcddb509b058351f0ee4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9ca8c7452493d915f9bbf2f39331e6c583d07a23"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dcfcd95b3ae7683e8ae55c92284b3430ce614bc7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-31496 (GCVE-0-2026-31496)

Vulnerability from cvelistv5 – Published: 2026-04-22 13:54 – Updated: 2026-04-22 13:54

Title

netfilter: nf_conntrack_expect: skip expectations in other netns via proc

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_expect: skip expectations in other netns via proc Skip expectations that do not reside in this netns. Similar to e77e6ff502ea ("netfilter: conntrack: do not dump other netns's conntrack entries via proc").

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/2028405ea6987b444…
	https://git.kernel.org/stable/c/168145c87444619e3…
	https://git.kernel.org/stable/c/dcfcd95b3ae7683e8…
	https://git.kernel.org/stable/c/9ca8c7452493d915f…
	https://git.kernel.org/stable/c/3265ad619987cb551…
	https://git.kernel.org/stable/c/3db5647984de03d9c…

Impacted products

Vendor

Product

Version

Linux

Affected: 9b03f38d0487f3908696242286d934c9b38f9d2a , < 2028405ea6987b4448784e439413202cfe19f43f (git)
Affected: 9b03f38d0487f3908696242286d934c9b38f9d2a , < 168145c87444619e3e649322bbe7719ecd00d411 (git)
Affected: 9b03f38d0487f3908696242286d934c9b38f9d2a , < dcfcd95b3ae7683e8ae55c92284b3430ce614bc7 (git)
Affected: 9b03f38d0487f3908696242286d934c9b38f9d2a , < 9ca8c7452493d915f9bbf2f39331e6c583d07a23 (git)
Affected: 9b03f38d0487f3908696242286d934c9b38f9d2a , < 3265ad619987cb551edaf797ed056d80ac450225 (git)
Affected: 9b03f38d0487f3908696242286d934c9b38f9d2a , < 3db5647984de03d9cae0dcddb509b058351f0ee4 (git)

Linux

Affected: 2.6.28
Unaffected: 0 , < 2.6.28 (semver)
Unaffected: 6.1.168 , ≤ 6.1.* (semver)
Unaffected: 6.6.131 , ≤ 6.6.* (semver)
Unaffected: 6.12.80 , ≤ 6.12.* (semver)
Unaffected: 6.18.21 , ≤ 6.18.* (semver)
Unaffected: 6.19.11 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_conntrack_expect.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2028405ea6987b4448784e439413202cfe19f43f",
              "status": "affected",
              "version": "9b03f38d0487f3908696242286d934c9b38f9d2a",
              "versionType": "git"
            },
            {
              "lessThan": "168145c87444619e3e649322bbe7719ecd00d411",
              "status": "affected",
              "version": "9b03f38d0487f3908696242286d934c9b38f9d2a",
              "versionType": "git"
            },
            {
              "lessThan": "dcfcd95b3ae7683e8ae55c92284b3430ce614bc7",
              "status": "affected",
              "version": "9b03f38d0487f3908696242286d934c9b38f9d2a",
              "versionType": "git"
            },
            {
              "lessThan": "9ca8c7452493d915f9bbf2f39331e6c583d07a23",
              "status": "affected",
              "version": "9b03f38d0487f3908696242286d934c9b38f9d2a",
              "versionType": "git"
            },
            {
              "lessThan": "3265ad619987cb551edaf797ed056d80ac450225",
              "status": "affected",
              "version": "9b03f38d0487f3908696242286d934c9b38f9d2a",
              "versionType": "git"
            },
            {
              "lessThan": "3db5647984de03d9cae0dcddb509b058351f0ee4",
              "status": "affected",
              "version": "9b03f38d0487f3908696242286d934c9b38f9d2a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_conntrack_expect.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.28"
            },
            {
              "lessThan": "2.6.28",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.168",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.131",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.80",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.21",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.11",
              "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": "6.1.168",
                  "versionStartIncluding": "2.6.28",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.131",
                  "versionStartIncluding": "2.6.28",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.80",
                  "versionStartIncluding": "2.6.28",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.21",
                  "versionStartIncluding": "2.6.28",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.11",
                  "versionStartIncluding": "2.6.28",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "2.6.28",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_expect: skip expectations in other netns via proc\n\nSkip expectations that do not reside in this netns.\n\nSimilar to e77e6ff502ea (\"netfilter: conntrack: do not dump other netns\u0027s\nconntrack entries via proc\")."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-22T13:54:18.287Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2028405ea6987b4448784e439413202cfe19f43f"
        },
        {
          "url": "https://git.kernel.org/stable/c/168145c87444619e3e649322bbe7719ecd00d411"
        },
        {
          "url": "https://git.kernel.org/stable/c/dcfcd95b3ae7683e8ae55c92284b3430ce614bc7"
        },
        {
          "url": "https://git.kernel.org/stable/c/9ca8c7452493d915f9bbf2f39331e6c583d07a23"
        },
        {
          "url": "https://git.kernel.org/stable/c/3265ad619987cb551edaf797ed056d80ac450225"
        },
        {
          "url": "https://git.kernel.org/stable/c/3db5647984de03d9cae0dcddb509b058351f0ee4"
        }
      ],
      "title": "netfilter: nf_conntrack_expect: skip expectations in other netns via proc",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31496",
    "datePublished": "2026-04-22T13:54:18.287Z",
    "dateReserved": "2026-03-09T15:48:24.102Z",
    "dateUpdated": "2026-04-22T13:54:18.287Z",
    "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-7QWQ-2HRF-8F6G

CVE-2026-31496 (GCVE-0-2026-31496)

Tags

Sightings

Nomenclature