CVE-2023-43785 Libx11: out-of-bounds memory access in _xkbreadkeysyms()
A local attacker can exploit an out-of-bounds read in libX11 to disclose sensitive memory contents from the system.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2023-43785?
CVE-2023-43785 is a medium-severity vulnerability in Fedoraproject Fedora, published on 10 Oct 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A vulnerability was found in libX11 due to a boundary condition within the _XkbReadKeySyms() function. This flaw allows a local user to trigger an out-of-bounds read error and read the contents of memory on the system.
Which versions are affected by CVE-2023-43785?
It affects 3 products.
Products include Fedoraproject Fedora, Redhat Enterprise Linux, X.org Libx11.
How do I fix CVE-2023-43785?
Apply the vendor's patch.
Is CVE-2023-43785 being exploited?
There is no known exploitation of CVE-2023-43785 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as ALPINE-CVE-2023-43785, AZL-31320, BELL-CVE-2023-43785, CLSA-2025-1745588411, DEBIAN-CVE-2023-43785, GHSA-9368-fgh5-gh2f and 2 more.