CVE-2022-2602

Published Jan 8, 2024

Last updated 11 days ago

Overview

AI description

Automated description summarized from trusted sources.

CVE-2022-2602 is a use-after-free (UAF) vulnerability found within the Linux kernel's `io_uring` subsystem. This flaw arises from a race condition that occurs during the interaction between `io_uring` requests and the Unix socket garbage collector. Specifically, registered file descriptors can be prematurely freed by the Unix garbage collector while `io_uring` is still actively processing them, leading to memory corruption. This vulnerability impacts the registered file descriptor functionality in `io_uring`, allowing for a scenario where a freed file structure can be re-used with an `io_uring` operation. Attackers can exploit this by registering a file, having it freed by the Unix Garbage Collector, and then manipulating the system to reuse the freed memory, potentially with a different file, to achieve unintended write operations.

Description: io_uring UAF, Unix SCM garbage collection
Source: security@ubuntu.com
NVD status: Modified
Products: linux_kernel, ubuntu_linux

Risk scores

CVSS 3.1

Type: Primary
Base score: 7
Impact score: 5.9
Exploitability score: 1
Vector string: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Severity: HIGH

Weaknesses

security@ubuntu.com: CWE-416
nvd@nist.gov: CWE-416

Hype score: Not currently trending

Configurations

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References

Sources include official advisories and independent security research.