CVE-2026-75883 — PPPD buffer overflow in PEAP response code
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 …
Published: 2026-09-18 · CVSS: 6.8 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7