A flaw was found in pppd. A remote attacker could exploit a buffer overflow vulnerability in the PEAP response handling. By sending a specially crafted PEAP Request packet, an attacker could cause the pppd process to corrupt global static data, leading to incorrect behavior or a system crash.

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4808-1 network-manager-l2tp security update
Debian DSA Debian DSA DSA-6498-1 network-manager-l2tp security update
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 04 Nov 2026 13:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-122

Wed, 04 Nov 2026 13:00:00 +0000

Type Values Removed Values Added
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. A flaw was found in pppd. A remote attacker could exploit a buffer overflow vulnerability in the PEAP response handling. By sending a specially crafted PEAP Request packet, an attacker could cause the pppd process to corrupt global static data, leading to incorrect behavior or a system crash.
Title PPPD buffer overflow in PEAP response code Pppd: pppd: buffer overflow in peap response handling leads to data corruption or denial of service.
First Time appeared Redhat
Redhat enterprise Linux
Weaknesses CWE-120
CPEs cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
References

Wed, 23 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Sat, 19 Sep 2026 23:00:00 +0000

Type Values Removed Values Added
First Time appeared Ppp Project
Ppp Project ppp
Vendors & Products Ppp Project
Ppp Project ppp

Fri, 18 Sep 2026 15:45:00 +0000

Type Values Removed Values Added
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.
Title PPPD buffer overflow in PEAP response code
Weaknesses CWE-122
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-11-04T12:49:31.762Z

Reserved: 2026-08-18T13:09:30.492Z

Link: CVE-2026-75883

cve-icon Vulnrichment

Updated: 2026-09-22T14:43:31.075Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-18T16:17:09.167

Modified: 2026-11-04T13:17:31.517

Link: CVE-2026-75883

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-19T22:29:09Z

Weaknesses