{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-23139",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-01-13T15:37:45.972Z",
        "datePublished": "2026-02-14T15:22:24.059Z",
        "dateUpdated": "2026-05-11T22:00:53.322Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T22:00:53.322Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conncount: update last_gc only when GC has been performed\n\nCurrently last_gc is being updated everytime a new connection is\ntracked, that means that it is updated even if a GC wasn't performed.\nWith a sufficiently high packet rate, it is possible to always bypass\nthe GC, causing the list to grow infinitely.\n\nUpdate the last_gc value only when a GC has been actually performed."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH"
                    }
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/netfilter/nf_conncount.c"
                    ],
                    "versions": [
                        {
                            "version": "f106694733c66a48740c25bc4e212e9b2ea364ce",
                            "lessThan": "2c7c71113ed6d3e2f3aca4c088f22283016ff34f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "be69850b461e7b491d87a22e33ab76fdd04b725e",
                            "lessThan": "c4cde57c8affdcca5bcff53a1047e15d268bdca1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d265929930e2ffafc744c0ae05fb70acd53be1ee",
                            "lessThan": "9f45588993d7f115280fc726119ca86fba32a811",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d265929930e2ffafc744c0ae05fb70acd53be1ee",
                            "lessThan": "3cd717359e56f82f06cbf8279b47a7d79880c6f3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d265929930e2ffafc744c0ae05fb70acd53be1ee",
                            "lessThan": "26a82dce2beee39c43c109d9647e16f49cb02a35",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d265929930e2ffafc744c0ae05fb70acd53be1ee",
                            "lessThan": "8bdafdf4900040a81422056cabe5e00a37bd101a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d265929930e2ffafc744c0ae05fb70acd53be1ee",
                            "lessThan": "7811ba452402d58628e68faedf38745b3d485e3c",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/netfilter/nf_conncount.c"
                    ],
                    "versions": [
                        {
                            "version": "5.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.161",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.121",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.66",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.6",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.1.161"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.6.121"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.12.66"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.18.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.19"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/2c7c71113ed6d3e2f3aca4c088f22283016ff34f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c4cde57c8affdcca5bcff53a1047e15d268bdca1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9f45588993d7f115280fc726119ca86fba32a811"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3cd717359e56f82f06cbf8279b47a7d79880c6f3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/26a82dce2beee39c43c109d9647e16f49cb02a35"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8bdafdf4900040a81422056cabe5e00a37bd101a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7811ba452402d58628e68faedf38745b3d485e3c"
                }
            ],
            "title": "netfilter: nf_conncount: update last_gc only when GC has been performed",
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                "engine": "bippy-1.2.0"
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}