CVE-2026-43629

HIGHPre-NVD 8.18.1—
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-07. the CNA's CVSS baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this week
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.1Exploit: None knownExposed: 0

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

llama.cpp builds b4882 through b9058 contain a heap buffer overflow vulnerability in the KV cache state restore path where the state_read_data() function computes write size without overflow checking, allowing attackers with write access to the slot_save_path directory to corrupt heap memory. Attackers can craft malicious state files where cell_count multiplication overflows or exceeds tensor buffer allocation to write attacker-controlled bytes past buffer boundaries, potentially resulting in heap metadata corruption, model weight corruption, or arbitrary code execution via function pointer overwrite.

CVSS v3
8.1
EG Score
8.1(high)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity81% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
47%
KEV
Not listed

Published

August 6, 2026

Last Modified

August 14, 2026

Advisory Details (1)

Auto-updated Aug 6, 2026
No patch confirmed yet.
generic

GitHub - Vladimir-tokarev-cyera/llama-cpp-security-patches: Security patches for unpatched llama.cpp vulnerabilities (CVE-2026-43626 through CVE-2026-43632) — Cyera Research · GitHub

https://github.com/Vladimir-tokarev-cyera/llama-cpp-security-patches

Vendor Advisories for CVE-2026-43629(1)

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

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
llama.cpp10108+dfsg-1 ... 9951+dfsg-3 (50 versions)——

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 30× in last 7d / 66× 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. 2026-08-20 16:49 UTCGHSA enrichment
  2. 2026-08-20 05:46 UTCGHSA enrichment
  3. 2026-08-19 18:49 UTCEG score recompute
  4. 2026-08-19 18:49 UTCGHSA enrichment
  5. 2026-08-19 17:04 UTCEPSS rescore
  6. 2026-08-19 06:47 UTCGHSA enrichment
  7. 2026-08-18 19:45 UTCEG score recompute
  8. 2026-08-18 19:45 UTCGHSA enrichment
  9. 2026-08-18 13:48 UTCEPSS rescore
  10. 2026-08-18 08:47 UTCGHSA enrichment
  11. 2026-08-17 21:51 UTCEG score recompute
  12. 2026-08-17 21:51 UTCGHSA enrichment
  13. 2026-08-17 13:47 UTCEPSS rescore
  14. 2026-08-17 10:50 UTCGHSA enrichment
  15. 2026-08-16 23:54 UTCEG score recompute
  16. 2026-08-16 23:54 UTCGHSA enrichment
  17. 2026-08-16 14:56 UTCEPSS rescore
  18. 2026-08-16 12:57 UTCEG score recompute
  19. 2026-08-16 12:57 UTCGHSA enrichment
  20. 2026-08-16 02:14 UTCEPSS rescore
  21. 2026-08-16 02:01 UTCGHSA enrichment
  22. 2026-08-15 15:04 UTCGHSA enrichment
  23. 2026-08-15 04:07 UTCEG score recompute
  24. 2026-08-15 04:07 UTCGHSA enrichment
  25. 2026-08-15 01:30 UTCEPSS rescore
Show 41 more
  1. 2026-08-14 17:10 UTCEG score recompute
  2. 2026-08-14 17:10 UTCGHSA enrichment
  3. 2026-08-14 15:35 UTCGHSA enrichment
  4. 2026-08-14 04:39 UTCEG score recompute
  5. 2026-08-14 04:39 UTCGHSA enrichment
  6. 2026-08-13 22:00 UTCEPSS rescore
  7. 2026-08-13 17:42 UTCGHSA enrichment
  8. 2026-08-13 06:46 UTCGHSA enrichment
  9. 2026-08-12 19:49 UTCEG score recompute
  10. 2026-08-12 19:49 UTCGHSA enrichment
  11. 2026-08-12 13:51 UTCEPSS rescore
  12. 2026-08-12 08:53 UTCGHSA enrichment
  13. 2026-08-11 21:56 UTCEG score recompute
  14. 2026-08-11 21:56 UTCGHSA enrichment
  15. 2026-08-11 13:43 UTCEPSS rescore
  16. 2026-08-11 11:00 UTCGHSA enrichment
  17. 2026-08-11 00:04 UTCEG score recompute
  18. 2026-08-11 00:04 UTCGHSA enrichment
  19. 2026-08-11 00:00 UTCEPSS rescore
  20. 2026-08-10 13:07 UTCGHSA enrichment
  21. 2026-08-10 02:11 UTCGHSA enrichment
  22. 2026-08-09 15:14 UTCEG score recompute
  23. 2026-08-09 15:14 UTCGHSA enrichment
  24. 2026-08-09 13:46 UTCEPSS rescore
  25. 2026-08-09 04:18 UTCGHSA enrichment
  26. 2026-08-08 17:22 UTCEG score recompute
  27. 2026-08-08 17:22 UTCGHSA enrichment
  28. 2026-08-08 16:37 UTCEPSS rescore
  29. 2026-08-08 06:25 UTCGHSA enrichment
  30. 2026-08-07 19:29 UTCEG score recompute
  31. 2026-08-07 19:29 UTCGHSA enrichment
  32. 2026-08-07 19:12 UTCEG score recompute
  33. 2026-08-07 19:12 UTCGHSA enrichment
  34. 2026-08-07 18:27 UTCEG score recompute
  35. 2026-08-07 18:27 UTCGHSA enrichment
  36. 2026-08-07 17:28 UTCEG score recompute
  37. 2026-08-07 17:28 UTCGHSA enrichment
  38. 2026-08-07 09:14 UTCEG score recompute
  39. 2026-08-07 09:14 UTCGHSA enrichment
  40. 2026-08-06 22:18 UTCEG score recompute
  41. 2026-08-06 22:15 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-43629?
CVE-2026-43629 is a high vulnerability published on August 6, 2026. llama.cpp builds b4882 through b9058 contain a heap buffer overflow vulnerability in the KV cache state restore path where the statereaddata() function computes write size without overflow checking, allowing attackers with write access to the slotsavepath directory to corrupt heap memory. Attackers…
When was CVE-2026-43629 disclosed?
CVE-2026-43629 was first published in the National Vulnerability Database on August 6, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43629 actively exploited?
CVE-2026-43629 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 53.0% of all scored CVEs.
What is the CVSS score of CVE-2026-43629?
CVE-2026-43629 has a CVSS v4.0 base score of 8.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-43629?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43629, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-43629

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