Tracker / CVE-2022-49870
CVE-2022-49870
High 7.1
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 and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 2.6.25 → 4.9.334 |
| linux | linux_kernel · 4.10 → 4.14.300 |
| linux | linux_kernel · 4.15 → 4.19.267 |
| linux | linux_kernel · 4.20 → 5.4.225 |
| linux | linux_kernel · 5.11 → 5.15.79 |
| linux | linux_kernel · 5.16 → 6.0.9 |
| linux | linux_kernel · 5.5 → 5.10.155 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.