Is CVE-2026-75883 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-75883?

CVE-2026-75883 has a CVSS v3 severity of MEDIUM (6.8).

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CVE-2026-75883

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.