Bug 2572983 (CVE-2026-128237) - CVE-2026-128237 scapy: scapy: Denial of Service via oversized ASN.1 OID decoding
Summary: CVE-2026-128237 scapy: scapy: Denial of Service via oversized ASN.1 OID decoding
Keywords:
Status: NEW
Alias: CVE-2026-128237
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 09:42 UTC by OSIDB Bzimport
Modified: 2026-11-13 09:57 UTC (History)
3 users (show)

Fixed In Version:
Clone Of:
Environment:
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Description OSIDB Bzimport 2026-11-13 09:42:25 UTC 
Scapy before 2.8.0 contains a denial of service vulnerability in BER_num_dec() and BERcodec_OID.do_dec() that allows remote attackers to exhaust CPU by supplying oversized OID arcs. Attackers can send ASN.1/BER data with many base-128 continuation bytes to cause quadratic CPU consumption or an uncaught ValueError crash on Python 3.11+.
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