Heap-based Buffer Overflow Affecting ppp package, versions *


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.18% (7th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-PPP-20029295
  • published21 Sept 2026
  • disclosed18 Sept 2026

Introduced: 18 Sep 2026

CVE-2026-75883  (opens in a new tab)
CWE-122  (opens in a new tab)

How to fix?

There is no fixed version for Debian:unstable ppp.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ppp package and not the ppp package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

The code in pppd that formats a response to a PEAP Request packet in peap_response() copies an entire TLS record of up to 16384 bytes into the fixed global buffer outpacket_buf without checking the available space and without implementing outgoing PEAP fragmentation. Thus a pppd process connecting to a server which requests PEAP authentication can be induced to corrupt global static data following the outpacket_buf array, most likely causing incorrect behavior or a crash.

CVSS Base Scores

version 3.1