{"id":"CVE-2023-53088","revision":null,"records":[{"revision":"47cf194a445c4cf5a19619adecf2e215","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2023-53088","aliases":[],"title":"mptcp: fix UaF in listener shutdown","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: fix UaF in listener shutdown\n\nAs reported by Christoph after having refactored the passive\nsocket initialization, the mptcp listener shutdown path is prone\nto an UaF issue.\n\n BUG: KASAN: use-after-free in _raw_spin_lock_bh+0x73/0xe0\n Write of size 4 at addr ffff88810cb23098 by task syz-executor731/1266\n\n CPU: 1 PID: 1266 Comm: syz-executor731 Not tainted 6.2.0-rc59af4eaa31c1f6c00c8f1e448ed99a45c66340dd5 #6\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n Call Trace:\n \n dump_stack_lvl+0x6e/0x91\n print_report+0x16a/0x46f\n kasan_report+0xad/0x130\n kasan_check_range+0x14a/0x1a0\n _raw_spin_lock_bh+0x73/0xe0\n subflow_error_report+0x6d/0x110\n sk_error_report+0x3b/0x190\n tcp_disconnect+0x138c/0x1aa0\n inet_child_forget+0x6f/0x2e0\n inet_csk_listen_stop+0x209/0x1060\n __mptcp_close_ssk+0x52d/0x610\n mptcp_destroy_common+0x165/0x640\n mptcp_destroy+0x13/0x80\n __mptcp_destroy_sock+0xe7/0x270\n __mptcp_close+0x70e/0x9b0\n mptcp_close+0x2b/0x150\n inet_release+0xe9/0x1f0\n __sock_release+0xd2/0x280\n sock_close+0x15/0x20\n __fput+0x252/0xa20\n task_work_run+0x169/0x250\n exit_to_user_mode_prepare+0x113/0x120\n syscall_exit_to_user_mode+0x1d/0x40\n do_syscall_64+0x48/0x90\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\nThe msk grace period can legitly expire in between the last\nreference count dropped in mptcp_subflow_queue_clean() and\nthe later eventual access in inet_csk_listen_stop()\n\nAfter the previous patch we don't need anymore special-casing\nmsk listener socket cleanup: the mptcp worker will process each\nof the unaccepted msk sockets.\n\nJust drop the now unnecessary code.\n\nPlease note this commit depends on the two parent ones:\n\n mptcp: refactor passive socket initialization\n mptcp: use the workqueue to destroy unaccepted sockets","state":0,"publishedAt":"2025-05-02T15:55:34.84+00:00","modifiedAt":"2026-10-15T21:41:26.237+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\": \"6aeed9045071f2252ff4e98fc13d1e304f33e5b0\",\n \"lessThan\": \"5564be74a22a61855f8b8c100d8c4abb003bb792\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"6aeed9045071f2252ff4e98fc13d1e304f33e5b0\",\n \"lessThan\": \"0f4f4cf5d32f10543deb946a37111e714579511e\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"6aeed9045071f2252ff4e98fc13d1e304f33e5b0\",\n \"lessThan\": \"0a3f4f1f9c27215e4ddcd312558342e57b93e518\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"a8a3e95c74e48c2c9b07b81fafda9122993f2e12\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5.18.10\",\n \"lessThan\": \"5.19\",\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\": \"5.19\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.19\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.22\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.2.8\",\n \"lessThanOrEqual\": \"6.2.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.3\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/5564be74a22a61855f8b8c100d8c4abb003bb792","https://git.kernel.org/stable/c/0f4f4cf5d32f10543deb946a37111e714579511e","https://git.kernel.org/stable/c/0a3f4f1f9c27215e4ddcd312558342e57b93e518"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53088","license":"CVE Program Terms of Use","key":"cve-program:CVE-2023-53088","identifiers":["CVE-2023-53088"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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