Bug 2566873 (CVE-2026-121944) - CVE-2026-121944 sngrep: sngrep: Denial of Service via crafted packet capture file
Summary: CVE-2026-121944 sngrep: sngrep: Denial of Service via crafted packet capture ...
Keywords:
Status: NEW
Alias: CVE-2026-121944
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2567288
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-04 13:04 UTC by OSIDB Bzimport
Modified: 2026-11-05 13:05 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Description OSIDB Bzimport 2026-11-04 13:04:25 UTC 
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.
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