medium
5.5
CWE
416 362
Advisory Published
CVE Published
Updated

CVE-2022-41218: Use After Free

First published: Wed Aug 31 2022(Updated: )

A flaw in the Linux Kernel dvb-core sub system (DVB API used by Digital TV devices) found. The result of race condition inside drivers/media/dvb-core/dmxdev.c is use after free. For triggering attack the local user have to physically remove USB device (like DVB demultiplexer device), and both run some malicious code. Reference: <a href="https://www.openwall.com/lists/oss-security/2022/09/23/4">https://www.openwall.com/lists/oss-security/2022/09/23/4</a>

Credit: cve@mitre.org cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/kernel-rt<0:4.18.0-477.10.1.rt7.274.el8_8
0:4.18.0-477.10.1.rt7.274.el8_8
redhat/kernel<0:4.18.0-477.10.1.el8_8
0:4.18.0-477.10.1.el8_8
Linux Kernel<=5.19.10
Debian Linux=11.0
debian/linux
5.10.223-1
5.10.234-1
6.1.129-1
6.1.128-1
6.12.21-1

Remedy

To mitigate this issue, prevent the module dvb-core from being loaded. Please see https://access.redhat.com/solutions/41278 for information on how to blacklist a kernel module to prevent it from loading automatically.

Remedy

https://lore.kernel.org/all/20220908132754.30532-1-tiwai@suse.de/

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2022-41218?

    CVE-2022-41218 has a severity rating of high due to the potential for a local user to exploit a race condition leading to a use after free vulnerability.

  • How do I fix CVE-2022-41218?

    To fix CVE-2022-41218, update your Linux kernel to version 5.10.223-1, 5.10.226-1, 6.1.119-1, 6.1.123-1, 6.12.11-1, or 6.12.12-1 or equivalent Red Hat packages.

  • Who is affected by CVE-2022-41218?

    CVE-2022-41218 affects users of the Linux Kernel, particularly those utilizing the DVB API in Digital TV devices.

  • What causes the CVE-2022-41218 vulnerability?

    The CVE-2022-41218 vulnerability is caused by a race condition inside the dvb-core subsystem leading to a use after free condition when a USB device is physically removed.

  • Can CVE-2022-41218 be exploited remotely?

    CVE-2022-41218 cannot be exploited remotely as it requires local access to the system to trigger the vulnerability.

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