CVE-2022-49941 in Linux
Zusammenfassung
von VulDB • 21.05.2026
Im Linux-Kernel wurde folgende Schwachstelle behoben:
tty: n_gsm: Aufruf von schlafenden Funktionen aus atomarem Kontext vermeiden
Syzkaller meldet das folgende Problem:
BUG: sleeping function called from invalid context at kernel/printk/printk.c:2347 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 1105, name: syz-executor423 3 locks held by syz-executor423/1105: #0: ffff8881468b9098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x90 drivers/tty/tty_ldisc.c:266
#1: ffff8881468b9130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:952 [inline]
#1: ffff8881468b9130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: do_tty_write drivers/tty/tty_io.c:975 [inline]
#1: ffff8881468b9130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x2a8/0x8e0 drivers/tty/tty_io.c:1118
#2: ffff88801b06c398 (&gsm->tx_lock){....}-{2:2}, at: gsmld_write+0x5e/0x150 drivers/tty/n_gsm.c:2717
irq event stamp: 3482 hardirqs last enabled at (3481): [] __get_reqs_available+0x143/0x2f0 fs/aio.c:946
hardirqs last disabled at (3482): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
hardirqs last disabled at (3482): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:153
preemption timestamp: 100000000000000 cpu: 1, vcpu: 1105, task PID: 1105 in state S stack: 0x0 Call Trace: __dump_stack lib/dump_stack.c:118 [inline]
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.