CVE-2020-27153

HIGHNVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 4%CVSS: 8.6Exploit: None knownExposed: 0

A fix is available — apply it.

In BlueZ before 5.55, a double free was found in the gatttool disconnect_cb() routine from shared/att.c. A remote attacker could potentially cause a denial of service or code execution, during service discovery, due to a redundant disconnect MGMT event.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
55(Track)
EG Risk 55/100SSVC: 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
Severity86% × 45%
Exploitation4% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
4%
EPSS %ILE
91%
KEV
Not listed

Published

October 15, 2020

Last Modified

April 15, 2026

Advisory Details (6)

Auto-updated Sep 1, 2026
Patch available. Sources: redhat, github_commit.
generic

[SECURITY] [DSA 4951-1] bluez security update

https://www.debian.org/security/2021/dsa-4951
generic

BlueZ: Arbitrary code execution (GLSA 202011-01) — Gentoo security

https://security.gentoo.org/glsa/202011-01
generic Patch Available

[SECURITY] [DLA 2410-1] bluez security update

https://lists.debian.org/debian-lts-announce/2020/10/msg00022.html
github_commit Patch Available

commit 5a180f2ec9ed (bluez/bluez)

Patch available: bluez/bluez 5.66 (contains commit 5a180f2ec9ed)

https://github.com/bluez/bluez/commit/5a180f2ec9edfacafd95e5fed20d36fe8e077f07
github_commit Patch Available

commit 1cd644db8c23 (bluez/bluez)

Patch available: bluez/bluez 5.66 (contains commit 1cd644db8c23)

https://github.com/bluez/bluez/commit/1cd644db8c23a2f530ddb93cebed7dacc5f5721a
redhat Patch Available

1884817 – (CVE-2020-27153) CVE-2020-27153 bluez: double free in gatttool client disconnect callback handler in src/shared/att.c could lead to DoS or RCE

Affected: Red Hat Enterprise Linux 8

https://bugzilla.redhat.com/show_bug.cgi?id=1884817

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibbluetooth-dev (5.56-0ubuntu4.1) @ hirsute2026-05-22ubuntu
ubuntulibbluetooth3 (5.37-0ubuntu5.3+esm1) @ xenial2026-05-22ubuntu
redhatbluez-0:5.52-4.el82021-05-18redhat

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

(10 across 10 ecosystems)
Alpine:v3.10(1)
PackageVulnerable rangeFixed inDependents
bluez—5.50-r5—
Alpine:v3.11(1)
PackageVulnerable rangeFixed inDependents
bluez—5.52-r2—
Alpine:v3.12(1)
PackageVulnerable rangeFixed inDependents
bluez—5.54-r6—
Alpine:v3.9(1)
PackageVulnerable rangeFixed inDependents
bluez—5.50-r2—
Debian:10(1)
PackageVulnerable rangeFixed inDependents
bluez5.50-1, 5.50-1.1, 5.50-1.2~deb10u15.50-1.2~deb10u2—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
bluez—5.55-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
bluez—5.55-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
bluez—5.55-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
bluez—5.55-1—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
bluez5.43-2, 5.43-2+deb9u1, 5.43-2+deb9u2, 5.43-2+deb9u2~deb8u15.43-2+deb9u3—

Weakness Classification(1)

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

All Vendor Advisories

(3)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× 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 183 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2020-27153?
CVE-2020-27153 is a high vulnerability published on October 15, 2020. In BlueZ before 5.55, a double free was found in the gatttool disconnect_cb() routine from shared/att.c. A remote attacker could potentially cause a denial of service or code execution, during service discovery, due to a redundant disconnect MGMT event.
When was CVE-2020-27153 disclosed?
CVE-2020-27153 was first published in the National Vulnerability Database on October 15, 2020, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-27153 actively exploited?
CVE-2020-27153 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4% probability of exploitation in the next 30 days, which ranks it in the top 9.3% of all scored CVEs.
What is the CVSS score of CVE-2020-27153?
CVE-2020-27153 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2020-27153?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-27153, 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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