{"id":"DEBIAN-CVE-2024-53047","details":"In the Linux kernel, the following vulnerability has been resolved:  mptcp: init: protect sched with rcu_read_lock  Enabling CONFIG_PROVE_RCU_LIST with its dependence CONFIG_RCU_EXPERT creates this splat when an MPTCP socket is created:    =============================   WARNING: suspicious RCU usage   6.12.0-rc2+ #11 Not tainted   -----------------------------   net/mptcp/sched.c:44 RCU-list traversed in non-reader section!!    other info that might help us debug this:    rcu_scheduler_active = 2, debug_locks = 1   no locks held by mptcp_connect/176.    stack backtrace:   CPU: 0 UID: 0 PID: 176 Comm: mptcp_connect Not tainted 6.12.0-rc2+ #11   Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011   Call Trace:    \u003cTASK\u003e    dump_stack_lvl (lib/dump_stack.c:123)    lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822)    mptcp_sched_find (net/mptcp/sched.c:44 (discriminator 7))    mptcp_init_sock (net/mptcp/protocol.c:2867 (discriminator 1))    ? sock_init_data_uid (arch/x86/include/asm/atomic.h:28)    inet_create.part.0.constprop.0 (net/ipv4/af_inet.c:386)    ? __sock_create (include/linux/rcupdate.h:347 (discriminator 1))    __sock_create (net/socket.c:1576)    __sys_socket (net/socket.c:1671)    ? __pfx___sys_socket (net/socket.c:1712)    ? do_user_addr_fault (arch/x86/mm/fault.c:1419 (discriminator 1))    __x64_sys_socket (net/socket.c:1728)    do_syscall_64 (arch/x86/entry/common.c:52 (discriminator 1))    entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)  That's because when the socket is initialised, rcu_read_lock() is not used despite the explicit comment written above the declaration of mptcp_sched_find() in sched.c. Adding the missing lock/unlock avoids the warning.","modified":"2026-09-15T09:02:59.569955445Z","published":"2024-11-19T18:15:25.060Z","upstream":["CVE-2024-53047"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-53047"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.11.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-53047.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.11.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-53047.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}