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  4. CVE 2026 121943 irontec sngrep through 190 out of bounds stack
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Back to active CVEs
Medium · CVSS 6.3CVE-2026-121943

Irontec sngrep through 1.9.0 Out-of-Bounds Stack Read via sip_check_packetCVE-2026-121943

Answer in brief

CVE-2026-121943 records a Medium severity (CVSS 6.3) vulnerability in Irontec sngrep through 1.9.0 Out-of-Bounds Stack Read via sip_check_packet. The current sources do not mark it as known exploited. The current feed maps irontec/sngrep (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 4, 2026Updated Nov 4, 2026Source checked Nov 4, 2026First seen by HOL Nov 4, 2026Material review Nov 4, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.3
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps irontec/sngrep (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
irontec/sngrepgeneric>=0 <=1.9.0Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for irontec/sngrep.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Nov 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 4, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencehackmd.io
  • Source referencevulncheck.com
Upstream source description

Irontec sngrep through 1.9.0 contains an out-of-bounds stack read vulnerability in sip_check_packet and sip_validate_packet caused by an off-by-one length check on 10240-byte SIP payloads. Remote attackers can send a crafted UDP or TCP SIP packet or supply a pcap file to crash sngrep or leak adjacent stack bytes into displayed SIP fields.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • sngrep through 1.9.0 Infinite Loop DoS via Crafted NFLOG TLVSame irontec/sngrep package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-170
Source
CVE List V5
Source checked
Nov 4, 2026
References
4 linked sources
Open source record