CVE-2022-4696 (GCVE-0-2022-4696)

Vulnerability from cvelistv5 – Published: 2023-01-11 12:33 – Updated: 2024-08-03 01:48
VLAI
Summary
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
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-763 - Release of Invalid Pointer or Reference
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Kernel Affected: 5.7-rc1 , ≤ 5.10.159 (custom)
Create a notification for this product.
Date Public
2022-12-15 05:43
Credits
Bing-Jhong Billy Jheng of Starlabs
Show details on NVD website
To clipboard 

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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.