CVE-2022-4696
- State
- Published
- Severity
- 7.8 High
- Published
- Jan 11, 2023
- Updated
- Aug 3, 2024
- Reserved
- Dec 23, 2022
Description
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
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Weaknesses
- CWE-763 Release of Invalid Pointer or Reference
Affected Products
| Product | Versions |
|---|---|
Linux KernelLinux |
|
References
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