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Vulnerability DatabaseCVE-2022-34495
CVE-2022-34495:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2022-34495 is a double free vulnerability discovered in the Linux kernel's rpmsgprobe function located in drivers/rpmsg/virtiorpmsg_bus.c, affecting versions before 5.18.4. The vulnerability was disclosed on June 26, 2022 (NVD, CVE).
Technical details
The vulnerability is classified as a double free condition (CWE-415) in the rpmsgprobe function. The issue occurs when rpmsgnsregisterdevice() fails, causing the vch pointer to be freed twice - once in the error handling path and again in virtiorpmsgrelease_device(). The CVSS v3.1 base score is 5.5 (Medium) with vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H (NVD).
Impact
The double free vulnerability could potentially lead to a denial of service condition through system crashes. The vulnerability requires local access and low privileges to exploit (Ubuntu).
Mitigation and workarounds
The vulnerability was fixed in Linux kernel version 5.18.4. The fix involves modifying the error handling path in rpmsgprobe() to avoid the double free by changing the error path from freevch to freectrldev, as vch will be freed in virtiorpmsgreleasedevice() (Linux Commit).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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