UBUNTU-CVE-2026-121944
Dashboard / Vulnerabilities / UBUNTU-CVE-2026-121944
Summary:
Details: sngrep through 1.9.0 contains an infinite loop vulnerability in capture_packet_reasm_ip() in src/capture.c that allows attackers to cause denial of service via crafted NFLOG TLVs. Attackers can supply a pcap file with link type NFLOG containing a non-payload TLV with length under 4, making the capture thread spin at full CPU and stop processing packets.
References: https://ubuntu.com/security/CVE-2026-121944, https://www.cve.org/CVERecord?id=CVE-2026-121944, github.com/irontec/sngrep
Affected packages
Package
Name: sngrep
Purl: pkg:deb/ubuntu/sngrep?arch=source&distro=xenial
Affected ranges
Type: ECOSYSTEM
Events:
Introduced- 0
Fixed -None
Affected versions
0.4.1-1
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
