Affected: Alpaquita:25: ppp, Alpaquita:stream: ppp

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.

Affected: openEuler:24.03-LTS-SP3: ppp

The Point-to-Point Protocol (PPP) provides a standard way to establish a network connection over a serial link. At present, this package supports IP and IPV6 and the protocols layered above them, such as TCP and UDP. The Linux port of this package also has support for IPX. Security Fix(es):

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.(CVE-2026-75883)

NetworkManager-applet-l2tp-1.52.6-1.1 on GA media

Affected: Ubuntu:18.04:LTS: network-manager-l2tp, Ubuntu:20.04:LTS: network-manager-l2tp, Ubuntu:22.04:LTS: network-manager-l2tp, Ubuntu:24.04:LTS: network-manager-l2tp, Ubuntu:26.04:LTS: network-manager-l2tp

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.