CVE-2026-58096

Root code execution via undersized endpoint option

Published Aug 26, 2026 · Updated Aug 27, 2026

Out-of-bounds write in FreeBSD ppp(8) before 14.4-RELEASE-p9, before 15.0-RELEASE-p13, or before 15.1-RELEASE-p3 allows remote attackers to crash it. LcpDecodeConfig() accepts endpoint discriminator options shorter than RFC 1717's minimum and writes beyond the intended buffer while decoding them. The gate is a malicious PPP peer reaching a running ppp(8) instance; the documented outcomes are a process crash or arbitrary code execution as root.

CVSS severityUnavailable
Unscored
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in FreeBSD ppp(8) before 14.4-RELEASE-p9, before 15.0-RELEASE-p13, or before 15.1-RELEASE-p3 allows remote attackers to crash it. LcpDecodeConfig() accepts endpoint discriminator options shorter than RFC 1717's minimum and writes beyond the intended buffer while decoding them. The gate is a malicious PPP peer reaching a running ppp(8) instance; the documented outcomes are a process crash or arbitrary code execution as root.

The record

CVE
CVE-2026-58096
Published
Aug 26, 2026
Updated
Aug 27, 2026
Vendor
The FreeBSD Project
Product
FreeBSD
Classifications
CWE-130, CWE-787
Attack vector
adjacent
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=14.4-RELEASE <p9
  2. Affected versionversion=15.0-RELEASE <p13
  3. Affected versionversion=15.1-RELEASE <p3

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesUnavailable in this record.

What is affected?

The FreeBSD Project · FreeBSDversion=14.4-RELEASE <p9; version=15.0-RELEASE <p13; version=15.1-RELEASE <p3

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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