critical
10
CWE
682
Advisory Published
Updated

CVE-2023-2163: Incorrect Verifier Branch Pruning Logic Leads To Arbitrary Read/Write In Linux Kernel and Lateral Privilege Escalation

First published: Wed Sep 20 2023(Updated: )

Incorrect verifier pruning in BPF in Linux Kernel &gt;=5.4 leads to unsafe code paths being incorrectly marked as safe, resulting in arbitrary read/write in kernel memory, lateral privilege escalation, and container escape. Reference and upstream patch: <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=71b547f561247897a0a14f3082730156c0533fed">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=71b547f561247897a0a14f3082730156c0533fed</a>

Credit: cve-coordination@google.com cve-coordination@google.com cve-coordination@google.com

Affected SoftwareAffected VersionHow to fix
redhat/kernel<6.3
6.3
Linux Kernel>=5.3<5.4.242
Linux Kernel>=5.5<5.10.179
Linux Kernel>=5.11<5.15.109
Linux Kernel>=5.16<6.1.26
Linux Kernel>=6.2<6.2.13
Linux Kernel>=5.4<6.3
Linux Kernel=6.3-rc1
Linux Kernel=6.3-rc2
Linux Kernel=6.3-rc3
Linux Kernel=6.3-rc4
Linux Kernel=6.3-rc5
Linux Kernel=6.3-rc6
Linux Kernel=6.3-rc7
IBM Security Verify Governance - Identity Manager<=ISVG 10.0.2
IBM Security Verify Governance - Identity Manager<=ISVG 10.0.2
debian/linux
5.10.223-1
5.10.234-1
6.1.129-1
6.1.135-1
6.12.22-1
6.12.25-1

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=71b547f561247897a0a14f3082730156c0533fed

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2023-2163?

    CVE-2023-2163 has a severity rating that can lead to arbitrary read/write in kernel memory and lateral privilege escalation.

  • How do I fix CVE-2023-2163?

    To fix CVE-2023-2163, upgrade to a kernel version higher than 6.3 or apply the specific patches provided by your Linux distribution.

  • Which Linux kernel versions are affected by CVE-2023-2163?

    CVE-2023-2163 affects Linux Kernel versions from 5.4 up to but not including 6.3.

  • Can CVE-2023-2163 be exploited for container escape?

    Yes, CVE-2023-2163 can potentially be exploited to escape from containers due to the privilege escalation it enables.

  • What components are impacted by CVE-2023-2163?

    CVE-2023-2163 impacts various components including the Linux kernel and specific IBM Security Verify Governance versions.

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