CVE-2019-20172

HighCVSS 7.8/10Last modified Jun 17, 2026

Description

Kernel/VM/MemoryManager.cpp in SerenityOS before 2019-12-30 does not reject syscalls with pointers into the kernel-only virtual address space, which allows local users to gain privileges by overwriting a return address that was found on the kernel stack.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-119

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://github.com/Fire30/CTF-WRITEUPS/tree/master/36c3_ctf/wisdomExploit, Third Party Advisory
https://github.com/SerenityOS/serenity/commit/0fc24fe2564736689859e7edfa177a86dac36bf9Patch, Third Party Advisory
https://github.com/Fire30/CTF-WRITEUPS/tree/master/36c3_ctf/wisdomExploit, Third Party Advisory
https://github.com/SerenityOS/serenity/commit/0fc24fe2564736689859e7edfa177a86dac36bf9Patch, Third Party Advisory

Timeline

Published: Dec 31, 2019
Last modified: Jun 17, 2026
NVD status: Modified

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