{"id":"CVE-2026-97524","revision":"15ccdda3af484e7484d955c9095224bb","records":[{"revision":"15ccdda3af484e7484d955c9095224bb","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-97524","aliases":[],"title":"mptcp: avoid unneeded actions on subflow reset","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: avoid unneeded actions on subflow reset\n\nOnce in a blue moon, the mptcp receive path can recursively call\nmptcp_data_ready() via state change under unlucky error conditions, and\nthen try to hold the data lock again.\n\nBreak the recursion loop explicitly checking for the exceptional\ncondition.\n\nAdd a new flag instead of using an existing one like 'closing', to exit\nearly in subflow_state_change(), and explicitly flush the RX queue at\nreset time.\n\nThis avoids unneeded processing to check for available data -- calling\nget_mapping_status() and more on a dying subflow -- but also in error\nreporting and worker scheduling.\n\nNote that we must consume the currently peeked skb before invoking\nmptcp_dss_corruption to avoid consuming it again after the eventual\nreset has freed it.","state":0,"publishedAt":"2026-09-25T10:21:27.668+00:00","modifiedAt":"2026-10-19T09:08:42.302+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/mptcp/protocol.c\",\n                        \"net/mptcp/protocol.h\",\n                        \"net/mptcp/subflow.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"fde99e972b8f88cebe619241d7aa43d288ef666a\",\n                            \"lessThan\": \"6d669c740933124eae3df8cfc15995af9bcc6aba\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"12c1676d598e3b8dd92a033b623b792cc2ea1ec5\",\n                            \"lessThan\": \"83a7dcdd2b1060484528da70a643125174d47e5a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"35668f8ec84f6c944676e48ecc6bbc5fc8e6fe25\",\n                            \"lessThan\": \"a370e56024df0b07e3120c45a9773ae123819fd6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b8be15d1ae7ea4eedd547c3b3141f592fbddcd30\",\n                            \"lessThan\": \"1962841387087970d75ba8b8d4c2aa2d45705e50\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e32d262c89e2b22cb0640223f953b548617ed8a6\",\n                            \"lessThan\": \"4b7abdcb5ba832fafab679f0d998af39cbc99307\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e32d262c89e2b22cb0640223f953b548617ed8a6\",\n                            \"lessThan\": \"b2dbcc1ed48b5ac070a41db4a52aade6823c4df0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e32d262c89e2b22cb0640223f953b548617ed8a6\",\n                            \"lessThan\": \"ce7e4ede01ed3e47a48c0f1ce1d87bf4864bee9f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e32d262c89e2b22cb0640223f953b548617ed8a6\",\n                            \"lessThan\": \"2b0f561f21b27c40c91ea4975268a06092bd7e9c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8bfd391bde685df7289b928ce8876a3583be4bfb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5.10.228\",\n                            \"lessThan\": \"5.10.271\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.169\",\n                            \"lessThan\": \"5.15.222\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.113\",\n                            \"lessThan\": \"6.1.189\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.57\",\n                            \"lessThan\": \"6.6.158\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.11.4\",\n                            \"lessThan\": \"6.12\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/mptcp/protocol.c\",\n                        \"net/mptcp/protocol.h\",\n                        \"net/mptcp/subflow.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.12\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.12\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.271\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.222\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.111\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.53\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.7\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/6d669c740933124eae3df8cfc15995af9bcc6aba","https://git.kernel.org/stable/c/83a7dcdd2b1060484528da70a643125174d47e5a","https://git.kernel.org/stable/c/a370e56024df0b07e3120c45a9773ae123819fd6","https://git.kernel.org/stable/c/1962841387087970d75ba8b8d4c2aa2d45705e50","https://git.kernel.org/stable/c/4b7abdcb5ba832fafab679f0d998af39cbc99307","https://git.kernel.org/stable/c/b2dbcc1ed48b5ac070a41db4a52aade6823c4df0","https://git.kernel.org/stable/c/ce7e4ede01ed3e47a48c0f1ce1d87bf4864bee9f","https://git.kernel.org/stable/c/2b0f561f21b27c40c91ea4975268a06092bd7e9c"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-97524","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-97524","identifiers":["CVE-2026-97524"]},"retained":false,"historicalAffected":[]}],"coverage":[]}