CVE-2026-6244

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreHIGH confidence

Score 5.5 from GitHub Security Advisory published 2026-09-05. the CNA's CVSS baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:tcpdump, epss, ghsa
Trending — 4 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

libpcap BPF interpreter for the 'div #k' and 'mod #k' ALU instructions does not check whether the immediate value is zero. In particular uncommon use cases a crafted filter program can cause a division by zero.

CVSS v3
5.5
EG Score
5.5(high)
EG Risk
25(Track)
EG Risk 25/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

September 5, 2026

Last Modified

September 17, 2026

Advisory Details (1)

Auto-updated Sep 5, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
github_commit

commit 98bb921b141a (the-tcpdump-group/libpcap)

Fix landed in the-tcpdump-group/libpcap commit 98bb921b141a — awaiting tagged release

https://github.com/the-tcpdump-group/libpcap/commit/98bb921b141aa642faedbf2ac510541c76499a19

Vendor Advisories for CVE-2026-6244(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(7 across 7 ecosystems)
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
libpcap—1.10.7-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
libpcap—1.10.7-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
libpcap—1.10.7-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
libpcap—1.10.7-r0—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libpcap1.10.3-1 ... 1.10.6-2 (13 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libpcap1.10.5-2, 1.10.6-1, 1.10.6-2——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libpcap1.10.5-2, 1.10.6-1, 1.10.6-2——

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 28× in last 7d / 57× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 04:43 UTCEG score recompute
  2. 2026-09-19 04:43 UTCVendor advisory
  3. 2026-09-19 04:43 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 06:13 UTCEG score recompute
  6. 2026-09-18 06:13 UTCVendor advisory
  7. 2026-09-18 06:13 UTCGHSA enrichment
  8. 2026-09-17 07:44 UTCEG score recompute
  9. 2026-09-17 07:44 UTCVendor advisory
  10. 2026-09-17 07:44 UTCGHSA enrichment
  11. 2026-09-17 07:31 UTCEG score recompute
  12. 2026-09-17 07:31 UTCVendor advisory
  13. 2026-09-17 07:31 UTCGHSA enrichment
  14. 2026-09-16 14:08 UTCEPSS rescore
  15. 2026-09-16 09:00 UTCEG score recompute
  16. 2026-09-16 09:00 UTCVendor advisory
  17. 2026-09-16 09:00 UTCGHSA enrichment
  18. 2026-09-16 05:15 UTCEPSS rescore
  19. 2026-09-15 09:22 UTCEG score recompute
  20. 2026-09-15 09:22 UTCVendor advisory
  21. 2026-09-15 09:22 UTCGHSA enrichment
  22. 2026-09-15 03:12 UTCEPSS rescore
  23. 2026-09-14 10:52 UTCEG score recompute
  24. 2026-09-14 10:52 UTCVendor advisory
  25. 2026-09-14 10:52 UTCGHSA enrichment
Show 32 more
  1. 2026-09-13 12:23 UTCEG score recompute
  2. 2026-09-13 12:23 UTCVendor advisory
  3. 2026-09-13 12:23 UTCGHSA enrichment
  4. 2026-09-12 13:53 UTCVendor advisory
  5. 2026-09-12 13:53 UTCGHSA enrichment
  6. 2026-09-11 15:24 UTCEG score recompute
  7. 2026-09-11 15:24 UTCVendor advisory
  8. 2026-09-11 15:24 UTCGHSA enrichment
  9. 2026-09-11 14:53 UTCEPSS rescore
  10. 2026-09-11 09:37 UTCEPSS rescore
  11. 2026-09-10 16:54 UTCEG score recompute
  12. 2026-09-10 16:54 UTCGHSA enrichment
  13. 2026-09-09 18:25 UTCEG score recompute
  14. 2026-09-09 18:25 UTCVendor advisory
  15. 2026-09-09 18:25 UTCGHSA enrichment
  16. 2026-09-08 22:01 UTCEPSS rescore
  17. 2026-09-08 19:54 UTCGHSA enrichment
  18. 2026-09-08 17:02 UTCEG score recompute
  19. 2026-09-08 17:02 UTCVendor advisory
  20. 2026-09-08 17:01 UTCGHSA enrichment
  21. 2026-09-08 16:06 UTCEG score recompute
  22. 2026-09-08 16:06 UTCVendor advisory
  23. 2026-09-08 16:05 UTCGHSA enrichment
  24. 2026-09-07 16:24 UTCEG score recompute
  25. 2026-09-07 16:24 UTCGHSA enrichment
  26. 2026-09-07 16:01 UTCEPSS rescore
  27. 2026-09-06 17:54 UTCEG score recompute
  28. 2026-09-06 17:54 UTCGHSA enrichment
  29. 2026-09-06 13:47 UTCEPSS rescore
  30. 2026-09-05 19:24 UTCEG score recompute
  31. 2026-09-05 18:56 UTCEG score recompute
  32. 2026-09-05 18:55 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-6244?
CVE-2026-6244 is a medium vulnerability published on September 5, 2026. libpcap BPF interpreter for the 'div #k' and 'mod #k' ALU instructions does not check whether the immediate value is zero. In particular uncommon use cases a crafted filter program can cause a division by zero.
When was CVE-2026-6244 disclosed?
CVE-2026-6244 was first published in the National Vulnerability Database on September 5, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6244 actively exploited?
CVE-2026-6244 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 99.1% of all scored CVEs.
What is the CVSS score of CVE-2026-6244?
CVE-2026-6244 has a CVSS v4.0 base score of 5.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-6244?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6244, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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