{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53181",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-06-09T07:44:35.390Z",
        "datePublished": "2026-06-25T08:38:55.994Z",
        "dateUpdated": "2026-06-25T08:38:55.994Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-25T08:38:55.994Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/vmci: fix sk_ack_backlog leak on failed handshake\n\nWhen vmci_transport_recv_connecting_server() returns an error,\nvmci_transport_recv_listen() calls vsock_remove_pending() but never\ncalls sk_acceptq_removed(). This leaves sk_ack_backlog incremented\npermanently.\n\nRepeated handshake failures (malformed packets, queue pair alloc\nfailure, event subscribe failure) cause sk_ack_backlog to climb\ntoward sk_max_ack_backlog. Once it reaches the limit the listener\npermanently refuses all new connections with -ECONNREFUSED, a\nsilent denial of service requiring a process restart to recover.\n\nThe two existing sk_acceptq_removed() calls in af_vsock.c do not\ncover this path: line 764 checks vsock_is_pending() which returns\nfalse after vsock_remove_pending(), and line 1889 is only reached\non successful accept().\n\nFix by balancing sk_acceptq_added() with sk_acceptq_removed() on\nthe error path."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/vmw_vsock/vmci_transport.c"
                    ],
                    "versions": [
                        {
                            "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
                            "lessThan": "22c587aa3ab1ab5264daff3ec32136fd30436c13",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
                            "lessThan": "cf7090e255d74c4b61c51f8ede9fcacdd8393b5b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
                            "lessThan": "ea0b03d52881c12a8c634ea0d6cbfa61cefdb488",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
                            "lessThan": "dfd853197615d322d3a88dbcab91fc0fd2096219",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
                            "lessThan": "bcb275626055df7f8f947f1a349754b4004d9a15",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
                            "lessThan": "ba9ad6015937a5e46ba1a31370e3efdec8abbdcc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
                            "lessThan": "9698582a4dd9c4a05889d7db96d4c0edc9e69cac",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
                            "lessThan": "c05fa14db43ebef3bd862ca9d073981c0358b3f0",
                            "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/vmw_vsock/vmci_transport.c"
                    ],
                    "versions": [
                        {
                            "version": "3.9",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.9",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.259",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.210",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.176",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.143",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.94",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.36",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.13",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "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": "3.9",
                                    "versionEndExcluding": "5.10.259"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.9",
                                    "versionEndExcluding": "5.15.210"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.9",
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionStartIncluding": "3.9",
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                                    "versionStartIncluding": "3.9",
                                    "versionEndExcluding": "7.1"
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                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/22c587aa3ab1ab5264daff3ec32136fd30436c13"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cf7090e255d74c4b61c51f8ede9fcacdd8393b5b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ea0b03d52881c12a8c634ea0d6cbfa61cefdb488"
                },
                {
                    "url": "https://git.kernel.org/stable/c/dfd853197615d322d3a88dbcab91fc0fd2096219"
                },
                {
                    "url": "https://git.kernel.org/stable/c/bcb275626055df7f8f947f1a349754b4004d9a15"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ba9ad6015937a5e46ba1a31370e3efdec8abbdcc"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9698582a4dd9c4a05889d7db96d4c0edc9e69cac"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c05fa14db43ebef3bd862ca9d073981c0358b3f0"
                }
            ],
            "title": "vsock/vmci: fix sk_ack_backlog leak on failed handshake",
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}