Bug 2573040 (CVE-2026-128238) - CVE-2026-128238 scapy: scapy: Denial of Service via deeply nested ASN.1 structures
Summary: CVE-2026-128238 scapy: scapy: Denial of Service via deeply nested ASN.1 struc...
Keywords:
Status: NEW
Alias: CVE-2026-128238
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-13 09:46 UTC by OSIDB Bzimport
Modified: 2026-11-13 10:32 UTC (History)
3 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-11-13 09:46:25 UTC 
Scapy before 2.8.0 contains an uncontrolled recursion vulnerability in the BER/ASN.1 decoder in scapy/asn1/ber.py that allows unauthenticated remote attackers to crash parsing applications. Attackers can send a single 833-byte packet with 250 nested ASN.1 SEQUENCE structures to trigger an unhandled RecursionError, terminating TLS, SNMP, X.509, or LDAP parsers even with safe=True.
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