medium
6.3
CWE
416
Advisory Published
Updated

CVE-2023-1855: Use After Free

First published: Wed Apr 05 2023(Updated: )

A use-after-free flaw was found in xgene_hwmon_remove in drivers/hwmon/xgene-hwmon.c in the Hardware Monitoring Linux Kernel Driver (xgene-hwmon). This flaw could allow a local attacker to crash the system due to a race problem. This vulnerability could even lead to a kernel information leak problem.

Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/Kernel<6.3
6.3
Linux Kernel<6.3
Linux Kernel>=4.9<4.14.311
Linux Kernel>=4.15<4.19.279
Linux Kernel>=4.20<5.4.238
Linux Kernel>=5.5<5.10.176
Linux Kernel>=5.11<5.15.104
Linux Kernel>=5.16<6.1.21
Linux Kernel>=6.2<6.2.8
Linux Kernel=6.3-rc1
Linux Kernel=6.3-rc2
Linux Kernel=6.3-rc3
Debian GNU/Linux=10.0
debian/linux
5.10.223-1
5.10.226-1
6.1.123-1
6.1.128-1
6.12.12-1
6.12.15-1
Debian=10.0
IBM Security Verify Governance - Identity Manager<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager<=ISVG 10.0.2

Remedy

https://github.com/torvalds/linux/commit/cb090e64cf25602b9adaf32d5dfc9c8bec493cd1

Remedy

https://lore.kernel.org/all/20230318122758.2140868-1-linux@roeck-us.net/

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2023-1855?

    CVE-2023-1855 has a high severity due to its potential to cause system crashes and kernel information leaks.

  • How do I fix CVE-2023-1855?

    To fix CVE-2023-1855, update your Kernel to version 6.3 or upgrade to specified fixed versions in Debian and IBM Security Verify components.

  • Which software is affected by CVE-2023-1855?

    CVE-2023-1855 affects the Hardware Monitoring Linux Kernel Driver in various Linux kernel versions prior to 6.3 and specific versions of IBM Security Verify components.

  • Can a remote attacker exploit CVE-2023-1855?

    CVE-2023-1855 is primarily a local vulnerability, meaning it requires local access to exploit the use-after-free flaw.

  • Is there a known workaround for CVE-2023-1855?

    Currently, there is no recommended workaround for CVE-2023-1855, so applying the available updates is the best mitigation strategy.

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