CVE-2026-75883
PPPD buffer overflow in PEAP response code
CVSS Score
6.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-122 |
| Vendor | ppp project |
| Product | ppp |
| Published | Sep 18, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
PPP Project / ppp
0 ≤ 2.5.0