CVE-2022-49870: Linux Kernel

High severity, CVSS 7.1. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: capabilities: fix undefined behavior in bit shift for CAP_TO_MASK Shifting signed 32-bit value by 31 bits is undefined, so changing significant bit to unsigned. The UBSAN warning calltrace like below: UBSAN: shift-out-of-bounds in security/commoncap.c:1252:2 left shift of 1 by 31 places cannot be represented in type 'int' Call Trace: <TASK> dump_stack_lvl+0x7d/0xa5 dump_stack+0x15/0x1b ubsan_epilogue+0xe/0x4e __ubsan_handle_shift_out_of_bounds+0x1e7/0x20c cap_task_prctl+0x561/0x6f0 security_task_prctl+0x5a/0xb0 __x64_sys_prctl+0x61/0x8f0 do_syscall_64+0x58/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd </TASK>

Affected products

• Linux Linux Kernel: from 2.6.25, before 4.9.334 (fixed in 4.9.334); from 4.10, before 4.14.300 (fixed in 4.14.300); from 4.15, before 4.19.267 (fixed in 4.19.267); from 4.20, before 5.4.225 (fixed in 5.4.225); from 5.5, before 5.10.155 (fixed in 5.10.155); from 5.11, before 5.15.79 (fixed in 5.15.79); …

Published 2025-05-01. Last modified 2026-06-17.