CVE Vulnerability

CVE-2022-4696

There exists a use-after-free vulnerability in the Linux kernel through io_uring and the IORING_OP_SPLICE operation. If IORING_OP_SPLICE is missing the IO_WQ_WORK_FILES flag, which signals that the operation won't use current->nsproxy, so its reference counter is not increased. This assumption is not always true as calling io_splice on specific files will call the get_uts function which will use current->nsproxy leading to invalidly decreasing its reference counter later causing the use-after-free vulnerability. We recommend upgrading to version 5.10.160 or above

7.8 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://kernel.dance/#75454b4bbfc7e6a4dd8338556f36ea9107ddf61a Exploit Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=75454b4bbfc7e6a4dd8338556f36ea9107ddf61a Mailing List Patch
Configurations

Configuration 1

cpe:2.3:o:linux:linux_kernel:5.7:rc1:*:*:*:*:*:*
Information

Published : 2023-01-11 01:15

Updated : 2023-01-19 01:24

NVD link : CVE-2022-4696

Mitre link : CVE-2022-4696

Products Affected
No products.
CWE
CWE-416