Vulnerability-Lookup

FKIE_CVE-2026-31496

Vulnerability from fkie_nvd - Published: 2026-04-22 14:16 - Updated: 2026-04-28 14:43

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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").

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/168145c87444619e3e649322bbe7719ecd00d411	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2028405ea6987b4448784e439413202cfe19f43f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3265ad619987cb551edaf797ed056d80ac450225	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3db5647984de03d9cae0dcddb509b058351f0ee4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9ca8c7452493d915f9bbf2f39331e6c583d07a23	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/dcfcd95b3ae7683e8ae55c92284b3430ce614bc7	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	2.6.28
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "6.1.168",
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  "cveTags": [],
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    }
  ],
  "id": "CVE-2026-31496",
  "lastModified": "2026-04-28T14:43:22.817",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
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  },
  "published": "2026-04-22T14:16:47.693",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "type": "Primary"
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}

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

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)

Show details on NVD website

JSON

To clipboard

{
  "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",
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              "versionType": "git"
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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            },
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              "status": "unaffected",
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              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.18.21",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.19.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
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        {
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      ],
      "title": "netfilter: nf_conntrack_expect: skip expectations in other netns via proc",
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  "cveMetadata": {
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    "datePublished": "2026-04-22T13:54:18.287Z",
    "dateReserved": "2026-03-09T15:48:24.102Z",
    "dateUpdated": "2026-04-22T13:54:18.287Z",
    "state": "PUBLISHED"
  },
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  "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

FKIE_CVE-2026-31496

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

Tags

Sightings

Nomenclature