CVE-2021-43612 Memory corruption in n/a
An out-of-bounds heap read in lldpd allows attackers to cause denial of service or potentially execute code via crafted SONMP packets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-43612?
CVE-2021-43612 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, published on 15 Apr 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In lldpd before 1.0.13, when decoding SONMP packets in the sonmp_decode function, it's possible to trigger an out-of-bounds heap read via short SONMP packets.
Weakness: CWE-787
Which versions are affected by CVE-2021-43612?
It affects 2 products.
Linux distribution packages (1)
lldpd openSUSE:Tumbleweed | All versions | 1.0.13-1.1 |
Products include Fedoraproject Fedora, Lldpd Project Lldpd.
How do I fix CVE-2021-43612?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-43612 being exploited?
There is no known exploitation of CVE-2021-43612 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as CLSA-2025-1758823952, DEBIAN-CVE-2021-43612, GHSA-x6gw-c547-cwm7, UBUNTU-CVE-2021-43612, openSUSE-SU-2024:11635-1.