CVE-2026-63867Published

mptcp: close TOCTOU race while computing rcv_wnd

Exact source revision recorded 23 Oct 2026 15:48:27 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-63867

Published

Linux

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/mptcp/options.c"
                    ],
                    "versions": [
                        {
                            "version": "fa3fe2b150316b294f2c662653501273ff25bba8",
                            "lessThan": "301a33fd590c408a05c5df800e0cc1e6a8a2f8f8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "fa3fe2b150316b294f2c662653501273ff25bba8",
                            "lessThan": "68364963e5baf03f16b4420292291f75c8f66497",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "fa3fe2b150316b294f2c662653501273ff25bba8",
                            "lessThan": "907ac6b1658e0277f979fcdfae2a753b495c1510",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "fa3fe2b150316b294f2c662653501273ff25bba8",
                            "lessThan": "c4f4cf60797974873dbc8e100144682a6f2f861f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "fa3fe2b150316b294f2c662653501273ff25bba8",
                            "lessThan": "3b8cbba7c0ed31189c89f90be247b8973ffa79ef",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "fa3fe2b150316b294f2c662653501273ff25bba8",
                            "lessThan": "8f4f0a157e8436a05bf8c3670b24dbc258911c43",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "fa3fe2b150316b294f2c662653501273ff25bba8",
                            "lessThan": "8ab24fdebc369c0dfb90f82c1650b1e66662bb45",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                }

Linux

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/mptcp/options.c"
                    ],
                    "versions": [
                        {
                            "version": "5.11",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.11",
                            "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"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON