CVE-2019-6706

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 17%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Lua 5.3.5 has a use-after-free in lua_upvaluejoin in lapi.c. For example, a crash outcome might be achieved by an attacker who is able to trigger a debug.upvaluejoin call in which the arguments have certain relationships.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
54
EG Risk 54/100CISA 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
Severity75% × 45%
Exploitation40% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
17%
EPSS %ILE
97th
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (EG-KEV: elevated) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). 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

January 23, 2019

Last Modified

November 21, 2024

References (12)

Vendor Advisories for CVE-2019-6706(1)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulua5.3 (5.3.1-1ubuntu2.1) @ xenial2026-05-27ubuntu
redhatlua-0:5.3.4-11.el82019-11-05redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(35 across 24 ecosystems)
Alpine:v3.14(2)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
lua5.4—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
Alpine:v3.15(2)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
lua5.4—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
Alpine:v3.16(2)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
lua5.4—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
Alpine:v3.17(2)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
lua5.4—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
Alpine:v3.18(2)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
lua5.4—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
Alpine:v3.19(2)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
lua5.4—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
Alpine:v3.20(2)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
lua5.4—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
Alpine:v3.21(2)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
lua5.4—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
Alpine:v3.22(2)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
lua5.4—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
Alpine:v3.23(2)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
lua5.4—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
Alpine:v3.24(2)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
lua5.4—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
Alpine:v3.10(1)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
Alpine:v3.11(1)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
Alpine:v3.12(1)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
Alpine:v3.13(1)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
Alpine:v3.6(1)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
Alpine:v3.7(1)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r0: fixed in 5.3.5-r0
—
Alpine:v3.8(1)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
Alpine:v3.9(1)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.5-r2: fixed in 5.3.5-r2
—
Debian:10(1)
PackageVulnerable rangeFix by version rangeDependents
lua5.35.3.3-1.1
  • every version up to 5.3.3-1.1+deb10u1: fixed in 5.3.3-1.1+deb10u1
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
lua5.35.3.3-1.1
  • every version up to 5.3.3-1.1+deb11u1: fixed in 5.3.3-1.1+deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.6-1: fixed in 5.3.6-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.6-1: fixed in 5.3.6-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
lua5.3—
  • every version up to 5.3.6-1: fixed in 5.3.6-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 4× in last 7d / 25× 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 150 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-46246
    First seen Jan 25, 2019

    Lua 5.3.5 - 'debug.upvaluejoin' Use After Free

    Open source ↗

Related CVEs(same product + same CWE)

Same product

2 shown

Alpine:v3.14:lua5.4 · Debian:10:lua5.3

Frequently asked(5)

What is CVE-2019-6706?
CVE-2019-6706 is a high vulnerability published on January 23, 2019. Lua 5.3.5 has a use-after-free in lua_upvaluejoin in lapi.c. For example, a crash outcome might be achieved by an attacker who is able to trigger a debug.upvaluejoin call in which the arguments have certain relationships.
When was CVE-2019-6706 disclosed?
CVE-2019-6706 was first published on January 23, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-6706 actively exploited?
CVE-2019-6706 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17% probability of exploitation in the next 30 days (97th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2019-6706?
CVE-2019-6706 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2019-6706?
A fix for CVE-2019-6706 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2019-6706 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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