CVE-2026-121944mediumCWE-835

CVE-2026-121944: medium-severity vulnerability in irontec sngrep

sngrep through 1.9.0 Infinite Loop DoS via Crafted NFLOG TLV

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33Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 6.8epss 0.2%
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.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
irontec · sngrep
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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