{"id":"CVE-2023-53590","summary":"sctp: add a refcnt in sctp_stream_priorities to avoid a nested loop","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: add a refcnt in sctp_stream_priorities to avoid a nested loop\n\nWith this refcnt added in sctp_stream_priorities, we don't need to\ntraverse all streams to check if the prio is used by other streams\nwhen freeing one stream's prio in sctp_sched_prio_free_sid(). This\ncan avoid a nested loop (up to 65535 * 65535), which may cause a\nstuck as Ying reported:\n\n    watchdog: BUG: soft lockup - CPU#23 stuck for 26s! [ksoftirqd/23:136]\n    Call Trace:\n     \u003cTASK\u003e\n     sctp_sched_prio_free_sid+0xab/0x100 [sctp]\n     sctp_stream_free_ext+0x64/0xa0 [sctp]\n     sctp_stream_free+0x31/0x50 [sctp]\n     sctp_association_free+0xa5/0x200 [sctp]\n\nNote that it doesn't need to use refcount_t type for this counter,\nas its accessing is always protected under the sock lock.\n\nv1-\u003ev2:\n - add a check in sctp_sched_prio_set to avoid the possible prio_head\n   refcnt overflow.","modified":"2026-04-02T09:44:32.583695Z","published":"2025-10-04T15:44:04.733Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53590.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/03c3a5584a0a29821e59b7834635ce823050caaa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/68ba44639537de6f91fe32783766322d41848127"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6d529928ea212127851a2df8c40d822237ca946b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8ee401f89cdb10f39098c0656d695b2bc4052100"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bf5540cbd20e2dae2c81ab9b31deef41ef147d0a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cec326443f01283ef68ea00c06ea073b1835a562"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53590.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53590"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a7555681e50bdebed2c40ff7404ee73c2e932993"},{"fixed":"cec326443f01283ef68ea00c06ea073b1835a562"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"176ee6c673ccd118e9392fd2dbb165423bdb99ca"},{"fixed":"8ee401f89cdb10f39098c0656d695b2bc4052100"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0dfb9a566327182387c90100ea54d8426cee8c67"},{"fixed":"bf5540cbd20e2dae2c81ab9b31deef41ef147d0a"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"9ed7bfc79542119ac0a9e1ce8a2a5285e43433e9"},{"fixed":"03c3a5584a0a29821e59b7834635ce823050caaa"},{"fixed":"6d529928ea212127851a2df8c40d822237ca946b"},{"fixed":"68ba44639537de6f91fe32783766322d41848127"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"fa20f88271259d42ebe66f0a8c4c20199e888c99"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53590.json"}}],"schema_version":"1.7.5"}