{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-46137", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.100Z", "datePublished": "2026-05-28T09:35:53.628Z", "dateUpdated": "2026-08-05T12:29:59.255Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:29:59.255Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: pm: ADD_ADDR rtx: fix potential data-race\n\nThis mptcp_pm_add_timer() helper is executed as a timer callback in\nsoftirq context. To avoid any data races, the socket lock needs to be\nheld with bh_lock_sock().\n\nIf the socket is in use, retry again soon after, similar to what is done\nwith the keepalive timer." } ], "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 - The vulnerable timer is part of the MPTCP network stack (net/mptcp); it is kept firing by a remote peer withholding ADD_ADDR echoes, and the racing conn_list modifications are driven by remote MP_JOIN/RST traffic, so an unauthenticated remote peer can reach and trigger it over the network.\nAC:L - The remote attacker controls both sides of the race — it drives the ADD_ADDR retransmit timer (by not echoing) and the concurrent subflow add/remove (MP_JOIN and RST), and can repeat this across many subflows/connections to reliably hit the unlocked conn_list iteration.\nPR:N - Exploitation only requires being a remote MPTCP peer of a server that advertises addresses; no credentials or privileges on the target are needed.\nUI:N - No action by any local user is required; the attacker drives the entire condition via network protocol behavior.\nS:U - The corruption stays within the kernel's own security authority; no crossing of a VM/sandbox/IOMMU boundary.\nC:H - The softirq timer iterates conn_list and reads subflow/ssk fields concurrently with subflow free, a use-after-free read of freed (potentially reallocated) memory, which per kernel scoring gives high confidentiality impact.\nI:H - Racing list_for_each_entry against list_del plus subflow free is a use-after-free/list-corruption condition; once the freed object is reallocated it can be leveraged for memory-integrity compromise, scored high for UAF-class races.\nA:H - The list-traversal-vs-deletion race can follow poisoned/dangling list pointers or dereference a freed subflow, causing a kernel oops/panic." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/mptcp/pm.c" ], "versions": [ { "version": "00cfd77b9063dcdf3628a7087faba60de85a9cc8", "lessThan": "d9b272a85fe6b8f993e37915311e4038c814a533", "status": "affected", "versionType": "git" }, { "version": "00cfd77b9063dcdf3628a7087faba60de85a9cc8", "lessThan": "23079e0b7742ec114d3507c3e3aad01b7b69e4af", "status": "affected", "versionType": "git" }, { "version": "00cfd77b9063dcdf3628a7087faba60de85a9cc8", "lessThan": "b35605e1f1e877038c8c9d499babbc891cdd234f", "status": "affected", "versionType": "git" }, { "version": "00cfd77b9063dcdf3628a7087faba60de85a9cc8", "lessThan": "013dcdc1961543b9a3433466bc8c79a2f4ca75b5", "status": "affected", "versionType": "git" }, { "version": "00cfd77b9063dcdf3628a7087faba60de85a9cc8", "lessThan": "6e4710d7d8782cb61af29a7e7111ddfc38b9e1a3", "status": "affected", "versionType": "git" }, { "version": "00cfd77b9063dcdf3628a7087faba60de85a9cc8", "lessThan": "2ad56e434199ca24a812bb353667aa1c3860f513", "status": "affected", "versionType": "git" }, { "version": "00cfd77b9063dcdf3628a7087faba60de85a9cc8", "lessThan": "cc3c0399361efaaf7ae64262eb3f70829b1189c6", "status": "affected", "versionType": "git" }, { "version": "00cfd77b9063dcdf3628a7087faba60de85a9cc8", "lessThan": "5cd6e0ad79d2615264f63929f8b457ad97ae550d", "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/mptcp/pm.c" ], "versions": [ { "version": "5.10", "status": "affected" }, { "version": "0", "lessThan": "5.10", "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": "6.6.141", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.91", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.30", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.7", "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": "5.10", "versionEndExcluding": "5.10.259" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.15.210" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.1.176" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.6.141" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.12.91" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.18.30" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "7.0.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/d9b272a85fe6b8f993e37915311e4038c814a533" }, { "url": "https://git.kernel.org/stable/c/23079e0b7742ec114d3507c3e3aad01b7b69e4af" }, { "url": "https://git.kernel.org/stable/c/b35605e1f1e877038c8c9d499babbc891cdd234f" }, { "url": "https://git.kernel.org/stable/c/013dcdc1961543b9a3433466bc8c79a2f4ca75b5" }, { "url": "https://git.kernel.org/stable/c/6e4710d7d8782cb61af29a7e7111ddfc38b9e1a3" }, { "url": "https://git.kernel.org/stable/c/2ad56e434199ca24a812bb353667aa1c3860f513" }, { "url": "https://git.kernel.org/stable/c/cc3c0399361efaaf7ae64262eb3f70829b1189c6" }, { "url": "https://git.kernel.org/stable/c/5cd6e0ad79d2615264f63929f8b457ad97ae550d" } ], "title": "mptcp: pm: ADD_ADDR rtx: fix potential data-race", "x_generator": { "engine": "bippy-1.2.0" } } } }