EUVD-2026-66247
GHSA-92ww-f582-cp72
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
PPP peer session establishment constitutes low privilege (PR:L); no further complexity beyond initiating the session; root-level RCE yields full C:H/I:H/A:H.
Primary rating from Vendor (freebsd).
CVSS VectorVendor: freebsd
Lifecycle Timeline
8DescriptionCVE.org
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.
AnalysisAI
Out-of-bounds write in FreeBSD's userspace ppp(8) daemon allows a malicious PPP peer to crash the process or execute arbitrary code as root. The flaw is in LcpDecodeConfig(), which fails to validate endpoint discriminator option lengths against the RFC 1717 minimum, enabling memory corruption during LCP negotiation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to act as a PPP peer - either as a legitimately connected peer (e.g., an ISP customer, VPN endpoint, or dial-up client) or as an attacker capable of intercepting or injecting into an existing PPP session. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 8.8 with AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H reflects network-reachable exploitation requiring only PPP peer-level access, with full confidentiality, integrity, and availability impact - consistent with arbitrary code execution as the root-owned daemon. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the patches documented in FreeBSD Security Advisory FreeBSD-SA-26:60.ppp.asc (https://security.freebsd.org/advisories/FreeBSD-SA-26:60.ppp.asc): upgrade to FreeBSD 15.1-RELEASE-p3, 15.0-RELEASE-p13, or 14.4-RELEASE-p9 as appropriate for your branch. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all FreeBSD systems running ppp(8) and assess network exposure. …
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