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CVE details

CVE-2026-121944

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.

Score
6.8 medium
Published
2026-11-04
Links
NVD · cve.org · Report wrong data

Matched ports (1)

PortPackageVersionStatusMaintainer
net/sngrepsngrep1.8.4unaddressedtad@vif.com

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No CPE in the port Makefile

net/sngrep (CPE matched by the package name) has no USES=cpe. The CVE was matched through a CPE from another source, so the package and the version range may belong to a different product. Check the CVE record before using this entry.

  <vuln vid="FIXME (make newentry)">
    <topic>sngrep -- FIXME</topic>
    <affects>
      <package>
	<name>sngrep</name>
	<range><le>1.9.0</le></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>CVE-2026-121944: 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.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-121944</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-121944</url>
    </references>
    <dates>
      <discovery>2026-11-04</discovery>
      <entry>2026-11-04</entry>
    </dates>
  </vuln>