CVE-2026-75883

Published: Sep 18, 2026Modified: Sep 22, 2026

6.8

Vector

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploitability: 1.6 / Impact: 5.2

Source: secalert@redhat.com (Secondary)

Description

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.

Related CWEs

CWE-122

Heap-based Buffer Overflow

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

References (1)

https://github.com/ppp-project/ppp/security/advisories/GHSA-rwr9-4vx8-vc35

Source: secalert@redhat.com

Timeline

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