Bug 2567575 (CVE-2026-123205)

Summary: CVE-2026-123205 accel-ppp: accel-ppp: Denial of Service via heap buffer overflow in logging targets
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in accel-ppp. This vulnerability allows an unauthenticated remote attacker to cause a Denial of Service (DoS) by crashing the daemon through a heap-based buffer overflow. When verbose logging is enabled, an attacker can send a Layer 2 Tunneling Protocol (L2TP) connection request containing numerous attributes, generating oversized log entries that exceed fixed buffer limits in the logging targets. Successful exploitation corrupts memory and terminates the service.
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Description OSIDB Bzimport 2026-11-05 22:09:09 UTC
accel-ppp before 1.15.0 contains a heap buffer overflow vulnerability in the tcp, syslog and pgsql log targets that allows unauthenticated remote peers to overflow fixed heap buffers by producing log lines exceeding LOG_MAX_SIZE. Attackers within client-ip-range can send an L2TP Start-Control-Connection-Request with many string AVPs when verbose logging is enabled to corrupt heap memory and crash the daemon.