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CVE-2022-4696

Status Candidate

Overview

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

Related Files

Debian Security Advisory 5324-1
Posted Jan 24, 2023
Authored by Debian | Site debian.org

Debian Linux Security Advisory 5324-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, debian
advisories | CVE-2022-2873, CVE-2022-3545, CVE-2022-3623, CVE-2022-36280, CVE-2022-41218, CVE-2022-45934, CVE-2022-4696, CVE-2022-47929, CVE-2023-0179, CVE-2023-0266, CVE-2023-0394, CVE-2023-23454, CVE-2023-23455
SHA-256 | 4738a5dd5b6f53a56ab15c9bc642f4b021b4a873119259aea80dd67e167ed354
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