vulnerability
Ubuntu: (CVE-2022-49870): linux vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:L/AC:L/Au:S/C:N/I:C/A:C) | May 1, 2025 | May 6, 2025 | Jun 26, 2025 |
Description
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:
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
Solution(s)
References
- CVE-2022-49870
- https://attackerkb.com/topics/CVE-2022-49870
- URL-https://git.kernel.org/linus/46653972e3ea64f79e7f8ae3aa41a4d3fdb70a13
- URL-https://git.kernel.org/stable/c/151dc8087b5609e53b069c068e3f3ee100efa586
- URL-https://git.kernel.org/stable/c/27bdb134c043ff32c459d98f16550d0ffa0b3c34
- URL-https://git.kernel.org/stable/c/46653972e3ea64f79e7f8ae3aa41a4d3fdb70a13
- URL-https://git.kernel.org/stable/c/5661f111a1616ac105ec8cec81bff99b60f847ac
- URL-https://git.kernel.org/stable/c/5b79fa628e2ab789e629a83cd211ef9b4c1a593e
- URL-https://git.kernel.org/stable/c/65b0bc7a0690861812ade523d19f82688ab819dc
- URL-https://git.kernel.org/stable/c/dbaab08c8677d598244d21afb7818e44e1c5d826
- URL-https://git.kernel.org/stable/c/fcbd2b336834bd24e1d9454ad5737856470c10d7
- URL-https://www.cve.org/CVERecord?id=CVE-2022-49870
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