CVE-2025-71146

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/08fa37f4c8c59c294e9c18fea2d083ee94074e5a	Patch
https://git.kernel.org/stable/c/0b88be7211d21a0d68bb1e56dc805944e3654d6f	Patch
https://git.kernel.org/stable/c/2e2a720766886190a6d35c116794693aabd332b6	Patch
https://git.kernel.org/stable/c/325eb61bb30790ea27782203a17b007ce1754a67	Patch
https://git.kernel.org/stable/c/4bd2b89f4028f250dd1c1625eb3da1979b04a5e8	Patch
https://git.kernel.org/stable/c/e1ac8dce3a893641bef224ad057932f142b8a36f	Patch
https://git.kernel.org/stable/c/f381a33f34dda9e4023e38ba68c943bca83245e9	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.12.63:::::::*
	cpe:2.3:o:linux:linux_kernel:6.18.2:::::::*
	cpe:2.3:o:linux:linux_kernel:6.19:rc1::::::

History

No history.

Information

Published : 2026-01-23 15:16

Updated : 2026-07-30 06:24

NVD link : CVE-2025-71146

Mitre link : CVE-2025-71146

CVE.ORG link : CVE-2025-71146

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-401

Missing Release of Memory after Effective Lifetime

{"id": "CVE-2025-71146", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "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"}], "programFiles": ["net/netfilter/nf_conncount.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.12.63", "lessThan": "6.12.64", "versionType": "semver"}, {"status": "affected", "version": "6.18.2", "lessThan": "6.18.3", "versionType": "semver"}], "programFiles": ["net/netfilter/nf_conncount.c"], "defaultStatus": "unaffected"}]}], "published": "2026-01-23T15:16:05.230", "references": [{"url": "https://git.kernel.org/stable/c/08fa37f4c8c59c294e9c18fea2d083ee94074e5a", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/0b88be7211d21a0d68bb1e56dc805944e3654d6f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/2e2a720766886190a6d35c116794693aabd332b6", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/325eb61bb30790ea27782203a17b007ce1754a67", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4bd2b89f4028f250dd1c1625eb3da1979b04a5e8", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e1ac8dce3a893641bef224ad057932f142b8a36f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f381a33f34dda9e4023e38ba68c943bca83245e9", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-401"}]}], "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 'ct' filtrado en rutas de error\n\nExisten algunas situaciones en las que 'ct' 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."}], "lastModified": "2026-07-30T06:24:54.520", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7C298528-1754-41BD-B4E9-84A37AB7BA32", "versionEndExcluding": "6.18", "versionStartIncluding": "6.17.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12.63:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7984A97B-8D26-49DE-B98A-80F987DC6ECE"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.18.2:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3F3959F8-92E0-4D2C-B5DA-B3BB4BE80113"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "17B67AA7-40D6-4AFA-8459-F200F3D7CFD1"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}