{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-74428",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-15T05:44:03.895Z",
        "datePublished": "2026-08-15T05:59:29.668Z",
        "dateUpdated": "2026-08-17T05:47:03.327Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-17T05:47:03.327Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix double unlock in rxrpc_recvmsg()\n\nFix a double unlock in rxrpc_recvmsg() when dealing with OOB messages."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 9.8,
                        "baseSeverity": "CRITICAL"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:N - RxRPC processes CHALLENGE packets from remote UDP peers; with RXRPC_MANAGE_RESPONSE and RxGK security, a network peer can queue OOB challenges that are consumed on the next recvmsg() during normal client authentication (e.g., AFS/YFS).\nAC:L - An attacker who is the RxRPC peer (or a local user running a malicious server) can reliably deliver a CHALLENGE and trigger recvmsg() on demand; no rare timing, layout, or victim state outside attacker control is required.\nPR:N - No administrative capability is needed on the victim; any remote peer in an RxRPC connection can send CHALLENGE packets, and unprivileged local users can create AF_RXRPC sockets, set MANAGE_RESPONSE, and call recvmsg() without special privileges.\nUI:N - Exploitation does not require victim interaction beyond normal automated RxRPC/AFS client operation; recvmsg() is invoked automatically when OOB challenges are queued during connection security negotiation.\nS:U - Impact is confined to kernel memory and locking on the affected host; it does not cross VM, container, or IOMMU security boundaries into a separate authority.\nC:H - Double release_sock() corrupts socket lock ownership, allowing concurrent unsynchronized access to socket/call state and adjacent kernel heap objects, which can be leveraged for arbitrary kernel memory disclosure.\nI:H - The corrupted socket lock permits overlapping recvmsg()/sendmsg() access to connection and skb state, enabling heap corruption and control-flow hijack primitives typical of kernel locking bugs.\nA:H - The double unlock triggers lockdep warnings and can panic/oops the kernel or hang socket I/O when concurrent threads access the same RxRPC socket after ownership is incorrectly cleared."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/rxrpc/recvmsg.c"
                    ],
                    "versions": [
                        {
                            "version": "5800b1cf3fd8ccab752a101865be1e76dac33142",
                            "lessThan": "8cd8cf3052fff9a4b86b25734f610e4af03786d3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5800b1cf3fd8ccab752a101865be1e76dac33142",
                            "lessThan": "1297ae6aeebc3863cb437e42a1bc4cd6173e43d9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5800b1cf3fd8ccab752a101865be1e76dac33142",
                            "lessThan": "a2f299b4d5510147fa8629a6aba2869bbcc88aea",
                            "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/rxrpc/recvmsg.c"
                    ],
                    "versions": [
                        {
                            "version": "6.16",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.16",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.40",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.5",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "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": "6.16",
                                    "versionEndExcluding": "6.18.40"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.16",
                                    "versionEndExcluding": "7.1.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.16",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/8cd8cf3052fff9a4b86b25734f610e4af03786d3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1297ae6aeebc3863cb437e42a1bc4cd6173e43d9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a2f299b4d5510147fa8629a6aba2869bbcc88aea"
                }
            ],
            "title": "rxrpc: Fix double unlock in rxrpc_recvmsg()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}