CVE-2026-58096

ppp(8): missing length validation in LcpDecodeConfig()

State: Published
Severity: 8.8 High
Published: Aug 26, 2026
Updated: Aug 27, 2026
Reserved: Jun 29, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-130 Improper Handling of Length Parameter Inconsistency
CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
FreeBSDFreeBSD	15.1-RELEASE to before p3Affected 15.0-RELEASE to before p13Affected 14.4-RELEASE to before p9Affected

References

https://security.freebsd.org/advisories/FreeBSD-SA-26:60.ppp.ascvendor-advisory

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