CVE-2025-71146 (GCVE-0-2025-71146)

Vulnerability from cvelistv5 – Published: 2026-01-23 14:15 – Updated: 2026-05-23 16:03
VLAI
Title
netfilter: nf_conncount: fix leaked ct in error paths
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conncount: fix leaked ct in error paths There are some situations where ct might be leaked as error paths are skipping the refcounted check and return immediately. In order to solve it make sure that the check is always called.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 6e86f0eca857ee42787e30e9ec0b726aebfcae0a , < 08fa37f4c8c59c294e9c18fea2d083ee94074e5a (git)
Affected: b160895d6bc9690459b16ef87799c9bd456af3ec , < e1ac8dce3a893641bef224ad057932f142b8a36f (git)
Affected: 8d5a2c94c24dcc226863a7c2b5034750370c2189 , < f381a33f34dda9e4023e38ba68c943bca83245e9 (git)
Affected: da9f247fb5efcd5a2730cdc989291b383c439e10 , < 325eb61bb30790ea27782203a17b007ce1754a67 (git)
Affected: 3558faee8aace3541189c3a2ca45c7e85e144b44 , < 0b88be7211d21a0d68bb1e56dc805944e3654d6f (git)
Affected: f6904ed15ed1a188543057e3cb0d02daa80edfc9 , < 4bd2b89f4028f250dd1c1625eb3da1979b04a5e8 (git)
Affected: be102eb6a0e7c03db00e50540622f4e43b2d2844 , < 2e2a720766886190a6d35c116794693aabd332b6 (git)
Affected: 8c2da7330214ce30f8333d1799a27ed0a9418f07 (git)
Affected: 6.17.13 , < 6.18 (semver)
Create a notification for this product.
Linux Linux Affected: 6.12.63 , < 6.12.64 (semver)
Affected: 6.18.2 , < 6.18.3 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_conncount.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "08fa37f4c8c59c294e9c18fea2d083ee94074e5a",
              "status": "affected",
              "version": "6e86f0eca857ee42787e30e9ec0b726aebfcae0a",
              "versionType": "git"
            },
            {
              "lessThan": "e1ac8dce3a893641bef224ad057932f142b8a36f",
              "status": "affected",
              "version": "b160895d6bc9690459b16ef87799c9bd456af3ec",
              "versionType": "git"
            },
            {
              "lessThan": "f381a33f34dda9e4023e38ba68c943bca83245e9",
              "status": "affected",
              "version": "8d5a2c94c24dcc226863a7c2b5034750370c2189",
              "versionType": "git"
            },
            {
              "lessThan": "325eb61bb30790ea27782203a17b007ce1754a67",
              "status": "affected",
              "version": "da9f247fb5efcd5a2730cdc989291b383c439e10",
              "versionType": "git"
            },
            {
              "lessThan": "0b88be7211d21a0d68bb1e56dc805944e3654d6f",
              "status": "affected",
              "version": "3558faee8aace3541189c3a2ca45c7e85e144b44",
              "versionType": "git"
            },
            {
              "lessThan": "4bd2b89f4028f250dd1c1625eb3da1979b04a5e8",
              "status": "affected",
              "version": "f6904ed15ed1a188543057e3cb0d02daa80edfc9",
              "versionType": "git"
            },
            {
              "lessThan": "2e2a720766886190a6d35c116794693aabd332b6",
              "status": "affected",
              "version": "be102eb6a0e7c03db00e50540622f4e43b2d2844",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8c2da7330214ce30f8333d1799a27ed0a9418f07",
              "versionType": "git"
            },
            {
              "lessThan": "6.18",
              "status": "affected",
              "version": "6.17.13",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_conncount.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6.12.64",
              "status": "affected",
              "version": "6.12.63",
              "versionType": "semver"
            },
            {
              "lessThan": "6.18.3",
              "status": "affected",
              "version": "6.18.2",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.64",
                  "versionStartIncluding": "6.12.63",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.3",
                  "versionStartIncluding": "6.18.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.17.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conncount: fix leaked ct in error paths\n\nThere are some situations where ct might be leaked as error paths are\nskipping the refcounted check and return immediately. In order to solve\nit make sure that the check is always called."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T16:03:24.040Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/08fa37f4c8c59c294e9c18fea2d083ee94074e5a"
        },
        {
          "url": "https://git.kernel.org/stable/c/e1ac8dce3a893641bef224ad057932f142b8a36f"
        },
        {
          "url": "https://git.kernel.org/stable/c/f381a33f34dda9e4023e38ba68c943bca83245e9"
        },
        {
          "url": "https://git.kernel.org/stable/c/325eb61bb30790ea27782203a17b007ce1754a67"
        },
        {
          "url": "https://git.kernel.org/stable/c/0b88be7211d21a0d68bb1e56dc805944e3654d6f"
        },
        {
          "url": "https://git.kernel.org/stable/c/4bd2b89f4028f250dd1c1625eb3da1979b04a5e8"
        },
        {
          "url": "https://git.kernel.org/stable/c/2e2a720766886190a6d35c116794693aabd332b6"
        }
      ],
      "title": "netfilter: nf_conncount: fix leaked ct in error paths",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71146",
    "datePublished": "2026-01-23T14:15:12.998Z",
    "dateReserved": "2026-01-13T15:30:19.661Z",
    "dateUpdated": "2026-05-23T16:03:24.040Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-71146",
      "date": "2026-06-30",
      "epss": "0.00114",
      "percentile": "0.01769"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-71146\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-23T15:16:05.230\",\"lastModified\":\"2026-06-17T10:03:45.407\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetfilter: nf_conncount: fix leaked ct in error paths\\n\\nThere are some situations where ct might be leaked as error paths are\\nskipping the refcounted check and return immediately. In order to solve\\nit make sure that the check is always called.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nnetfilter: nf_conncount: correcci\u00f3n de \u0027ct\u0027 filtrado en rutas de error\\n\\nExisten algunas situaciones en las que \u0027ct\u0027 podr\u00eda filtrarse, ya que las rutas de error est\u00e1n omitiendo la verificaci\u00f3n de conteo de referencias y retornan inmediatamente. Para resolverlo, hay que asegurarse de que la verificaci\u00f3n siempre sea llamada.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/netfilter/nf_conncount.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6e86f0eca857ee42787e30e9ec0b726aebfcae0a\",\"lessThan\":\"08fa37f4c8c59c294e9c18fea2d083ee94074e5a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b160895d6bc9690459b16ef87799c9bd456af3ec\",\"lessThan\":\"e1ac8dce3a893641bef224ad057932f142b8a36f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8d5a2c94c24dcc226863a7c2b5034750370c2189\",\"lessThan\":\"f381a33f34dda9e4023e38ba68c943bca83245e9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"da9f247fb5efcd5a2730cdc989291b383c439e10\",\"lessThan\":\"325eb61bb30790ea27782203a17b007ce1754a67\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3558faee8aace3541189c3a2ca45c7e85e144b44\",\"lessThan\":\"0b88be7211d21a0d68bb1e56dc805944e3654d6f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f6904ed15ed1a188543057e3cb0d02daa80edfc9\",\"lessThan\":\"4bd2b89f4028f250dd1c1625eb3da1979b04a5e8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"be102eb6a0e7c03db00e50540622f4e43b2d2844\",\"lessThan\":\"2e2a720766886190a6d35c116794693aabd332b6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8c2da7330214ce30f8333d1799a27ed0a9418f07\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6.17.13\",\"lessThan\":\"6.18\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/netfilter/nf_conncount.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.12.63\",\"lessThan\":\"6.12.64\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.18.2\",\"lessThan\":\"6.18.3\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-401\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.17.13\",\"versionEndExcluding\":\"6.18\",\"matchCriteriaId\":\"7C298528-1754-41BD-B4E9-84A37AB7BA32\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12.63:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"7984A97B-8D26-49DE-B98A-80F987DC6ECE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.18.2:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"3F3959F8-92E0-4D2C-B5DA-B3BB4BE80113\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"17B67AA7-40D6-4AFA-8459-F200F3D7CFD1\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/08fa37f4c8c59c294e9c18fea2d083ee94074e5a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/0b88be7211d21a0d68bb1e56dc805944e3654d6f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2e2a720766886190a6d35c116794693aabd332b6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/325eb61bb30790ea27782203a17b007ce1754a67\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4bd2b89f4028f250dd1c1625eb3da1979b04a5e8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e1ac8dce3a893641bef224ad057932f142b8a36f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f381a33f34dda9e4023e38ba68c943bca83245e9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.