FreeBSD PPP Buffer Overflow in mp_SetEnddisc()
CVE-2026-58097 Published on August 26, 2026
ppp(8): missing length validation in mp_SetEnddisc()
mp_SetEnddisc() copied a user-supplied PSN endpoint value without length validation, allowing a buffer overflow via the ppp(8) command interface.
A local user with access to the ppp(8) command interface can crash ppp(8) or potentially execute arbitrary code as root.
Vulnerability Analysis
CVE-2026-58097 can be exploited with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Types
What is a length manipulation Vulnerability?
The software parses a formatted message or structure, but it does not handle or incorrectly handles a length field that is inconsistent with the actual length of the associated data. If an attacker can manipulate the length parameter associated with an input such that it is inconsistent with the actual length of the input, this can be leveraged to cause the target application to behave in unexpected, and possibly, malicious ways. One of the possible motives for doing so is to pass in arbitrarily large input to the application. Another possible motivation is the modification of application state by including invalid data for subsequent properties of the application. Such weaknesses commonly lead to attacks such as buffer overflows and execution of arbitrary code.
CVE-2026-58097 has been classified to as a length manipulation vulnerability or weakness.
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().
Products Associated with CVE-2026-58097
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Affected Versions
FreeBSD:- Version 15.1-RELEASE and below p3 is affected.
- Version 15.0-RELEASE and below p13 is affected.
- Version 14.4-RELEASE and below p9 is affected.