CVE-2026-43629

HIGHPre-NVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-07. A secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
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: 0.7%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
8.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.7%
EPSS %ILE
51st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 6, 2026

Last Modified

September 21, 2026

Advisory Details (1)

Auto-updated Aug 6, 2026
Patch available.
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 rangeFix by version rangeDependents
llama.cpp10108+dfsg-1 ... 9951+dfsg-3 (59 versions)
  • every version on: no fix on record
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 17× in last 7d / 92× 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.

Showing the most recent 100 of 216 total refreshes for this CVE.

  1. 2026-10-04 23:23 UTCEG score recompute
  2. 2026-10-04 23:23 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 05:50 UTCEG score recompute
  5. 2026-10-04 05:50 UTCGHSA enrichment
  6. 2026-10-03 14:25 UTCEPSS rescore
  7. 2026-10-03 01:04 UTCEG score recompute
  8. 2026-10-03 01:04 UTCGHSA enrichment
  9. 2026-10-02 09:40 UTCEG score recompute
  10. 2026-10-02 09:40 UTCGHSA enrichment
  11. 2026-10-01 19:50 UTCEPSS rescore
  12. 2026-10-01 12:40 UTCGHSA enrichment
  13. 2026-10-01 01:44 UTCEG score recompute
  14. 2026-10-01 01:44 UTCGHSA enrichment
  15. 2026-09-30 15:03 UTCEPSS rescore
  16. 2026-09-29 05:54 UTCEG score recompute
  17. 2026-09-29 05:54 UTCGHSA enrichment
  18. 2026-09-28 04:26 UTCGHSA enrichment
  19. 2026-09-27 17:30 UTCEG score recompute
  20. 2026-09-27 17:30 UTCGHSA enrichment
  21. 2026-09-27 13:48 UTCEPSS rescore
  22. 2026-09-26 15:58 UTCEPSS rescore
  23. 2026-09-25 04:22 UTCEG score recompute
  24. 2026-09-25 04:22 UTCGHSA enrichment
  25. 2026-09-24 08:14 UTCGHSA enrichment
Show 75 more
  1. 2026-09-23 21:18 UTCEG score recompute
  2. 2026-09-23 21:18 UTCGHSA enrichment
  3. 2026-09-23 17:53 UTCEPSS rescore
  4. 2026-09-23 08:17 UTCGHSA enrichment
  5. 2026-09-22 21:20 UTCEG score recompute
  6. 2026-09-22 21:20 UTCGHSA enrichment
  7. 2026-09-22 05:23 UTCEG score recompute
  8. 2026-09-22 05:23 UTCGHSA enrichment
  9. 2026-09-21 18:17 UTCGHSA enrichment
  10. 2026-09-21 12:49 UTCGHSA enrichment
  11. 2026-09-20 22:52 UTCEG score recompute
  12. 2026-09-20 22:52 UTCGHSA enrichment
  13. 2026-09-20 20:15 UTCEPSS rescore
  14. 2026-09-20 10:57 UTCGHSA enrichment
  15. 2026-09-19 23:59 UTCEG score recompute
  16. 2026-09-19 23:59 UTCGHSA enrichment
  17. 2026-09-19 13:01 UTCGHSA enrichment
  18. 2026-09-19 00:11 UTCEG score recompute
  19. 2026-09-19 00:11 UTCGHSA enrichment
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-18 13:12 UTCGHSA enrichment
  22. 2026-09-18 02:11 UTCEG score recompute
  23. 2026-09-18 02:11 UTCGHSA enrichment
  24. 2026-09-17 19:31 UTCEPSS rescore
  25. 2026-09-17 15:15 UTCGHSA enrichment
  26. 2026-09-17 00:58 UTCEG score recompute
  27. 2026-09-17 00:58 UTCGHSA enrichment
  28. 2026-09-16 14:08 UTCEPSS rescore
  29. 2026-09-16 05:15 UTCEPSS rescore
  30. 2026-09-16 03:00 UTCGHSA enrichment
  31. 2026-09-15 14:27 UTCEG score recompute
  32. 2026-09-15 14:27 UTCGHSA enrichment
  33. 2026-09-15 01:10 UTCGHSA enrichment
  34. 2026-09-14 10:12 UTCGHSA enrichment
  35. 2026-09-13 22:50 UTCEG score recompute
  36. 2026-09-13 22:50 UTCGHSA enrichment
  37. 2026-09-13 16:47 UTCEPSS rescore
  38. 2026-09-13 11:53 UTCGHSA enrichment
  39. 2026-09-13 00:56 UTCEG score recompute
  40. 2026-09-13 00:56 UTCGHSA enrichment
  41. 2026-09-12 15:01 UTCEPSS rescore
  42. 2026-09-12 13:43 UTCGHSA enrichment
  43. 2026-09-12 02:46 UTCGHSA enrichment
  44. 2026-09-11 15:48 UTCEG score recompute
  45. 2026-09-11 15:48 UTCGHSA enrichment
  46. 2026-09-11 14:53 UTCEPSS rescore
  47. 2026-09-11 09:37 UTCEPSS rescore
  48. 2026-09-11 04:43 UTCGHSA enrichment
  49. 2026-09-10 17:44 UTCEG score recompute
  50. 2026-09-10 17:44 UTCGHSA enrichment
  51. 2026-09-10 09:34 UTCEPSS rescore
  52. 2026-09-10 05:50 UTCGHSA enrichment
  53. 2026-09-09 18:53 UTCGHSA enrichment
  54. 2026-09-09 06:09 UTCEG score recompute
  55. 2026-09-09 06:08 UTCGHSA enrichment
  56. 2026-09-08 22:00 UTCEPSS rescore
  57. 2026-09-08 04:54 UTCGHSA enrichment
  58. 2026-09-07 17:57 UTCEG score recompute
  59. 2026-09-07 17:57 UTCGHSA enrichment
  60. 2026-09-07 16:01 UTCEPSS rescore
  61. 2026-09-06 14:17 UTCEG score recompute
  62. 2026-09-06 14:17 UTCGHSA enrichment
  63. 2026-09-06 13:47 UTCEPSS rescore
  64. 2026-09-06 03:21 UTCEG score recompute
  65. 2026-09-06 03:21 UTCGHSA enrichment
  66. 2026-09-05 16:22 UTCEG score recompute
  67. 2026-09-05 16:22 UTCGHSA enrichment
  68. 2026-09-05 03:31 UTCEG score recompute
  69. 2026-09-05 03:31 UTCGHSA enrichment
  70. 2026-09-04 09:12 UTCEG score recompute
  71. 2026-09-04 09:12 UTCGHSA enrichment
  72. 2026-09-04 05:06 UTCEPSS rescore
  73. 2026-09-03 17:19 UTCGHSA enrichment
  74. 2026-09-03 06:15 UTCEG score recompute
  75. 2026-09-03 06:15 UTCGHSA enrichment

Related CVEs(same product + 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 on August 6, 2026, with the most recent update on September 21, 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 0.7% probability of exploitation in the next 30 days (51st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-43629?
CVE-2026-43629 has a CVSS base score of 8.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-43629?
A fix for CVE-2026-43629 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-43629 are linked in the Vendor Advisories panel on this page.

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