{"id":"CVE-2026-97524","published":"2026-09-25T11:17:02.520","lastModified":"2026-09-25T15:17:57.773","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.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/2b0f561f21b27c40c91ea4975268a06092bd7e9c","tags":[]},{"url":"https://git.kernel.org/stable/c/4b7abdcb5ba832fafab679f0d998af39cbc99307","tags":[]},{"url":"https://git.kernel.org/stable/c/b2dbcc1ed48b5ac070a41db4a52aade6823c4df0","tags":[]},{"url":"https://git.kernel.org/stable/c/ce7e4ede01ed3e47a48c0f1ce1d87bf4864bee9f","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}