CVE-2026-58096 ppp(8): missing length validation in LcpDecodeConfig()
A malicious PPP peer can trigger an out-of-bounds write in the FreeBSD PPP daemon, potentially leading to arbitrary code execution as root or a system crash.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-58096?
CVE-2026-58096 is a high-severity memory corruption vulnerability in Freebsd Freebsd, published on 26 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
LcpDecodeConfig() did not validate the length of received endpoint discriminator options against the minimum required by RFC 1717. Undersized options would trigger an out-of-bounds write.
A malicious PPP peer can exploit CVE-2026-58095 and CVE-2026-58096 to crash ppp(8) or potentially execute arbitrary code as root.
Which versions are affected by CVE-2026-58096?
It affects 1 product.
Products include Freebsd Freebsd.
How do I fix CVE-2026-58096?
No fix has been published for CVE-2026-58096 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-58096 being exploited?
There is no known exploitation of CVE-2026-58096 in the wild and no public exploit code.
Other vulnerabilities in Freebsd Freebsd
Sources
Also known as GHSA-92ww-f582-cp72.