CVE-2005-0109

MEDIUMNVD 5.65.6—
EchelonGraph scoreMEDIUM confidence

Score 5.6 from GitHub Security Advisory published 2022-05-03. NVD baseline CVSS 5.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.6EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 5.6Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Hyper-Threading technology, as used in FreeBSD and other operating systems that are run on Intel Pentium and other processors, allows local users to use a malicious thread to create covert channels, monitor the execution of other threads, and obtain sensitive information such as cryptographic keys, via a timing attack on memory cache misses.

CVSS v3
5.6
EG Score
5.6MEDIUMmedium confidence
EG Risk
30
EG Risk 30/100CISA 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
Severity56% × 45%
Exploitation1% × 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
0.5%
EPSS %ILE
41st
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 none (no KEV listing, exploit record or EPSS ≥ 50%) · 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

March 5, 2005

Last Modified

June 16, 2026

Advisory Details (7)

Auto-updated May 31, 2026
🔬 Proof of concept available. Patch available.
generic🟡 PoC Available

Hyper-Threading considered harmful

http://www.daemonology.net/hyperthreading-considered-harmful/
generic
http://securitytracker.com/id?1013967
generic

About Secunia Research | Flexera

http://secunia.com/advisories/18165
generic

About Secunia Research | Flexera

http://secunia.com/advisories/15348
generic

'Re: FreeBSD hiding security stuff' - MARC

http://marc.info/?l=openbsd-misc&m=110995101417256&w=2
generic

'[Fwd: Re: FW:FreeBSD hiding security stuff]' - MARC

http://marc.info/?l=freebsd-security&m=110994370429609&w=2
generic

'Re: FW:FreeBSD hiding security stuff' - MARC

http://marc.info/?l=freebsd-hackers&m=110994026421858&w=2

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-2.6.8.1-5-amd64-k8 () @ warty2026-05-31ubuntu
redhatpatch2005-12-19redhat
redhatopenssl096b-0:0.9.6b-22.42005-10-11redhat
redhatopenssl096b-0:0.9.6b-22.32005-06-01redhat

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.

All Vendor Advisories

(4)

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 1× in last 7d / 7× 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. 2026-09-29 02:42 UTCEG score recompute
  2. 2026-09-18 19:20 UTCEPSS rescore
  3. 2026-09-17 19:20 UTCEPSS rescore
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  12. 2026-07-23 00:47 UTCEG score recompute
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  14. 2026-07-22 23:51 UTCEG score recompute
  15. 2026-07-22 21:31 UTCEG score recompute
  16. 2026-07-18 09:59 UTCEPSS rescore
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  18. 2026-07-15 16:53 UTCEPSS rescore
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  1. 2026-07-08 15:09 UTCEPSS rescore
  2. 2026-07-06 02:19 UTCEPSS rescore
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  8. 2026-06-28 04:52 UTCEPSS rescore
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  16. 2026-06-19 19:22 UTCEPSS rescore
  17. 2026-06-18 17:49 UTCEPSS rescore
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  22. 2026-06-16 17:49 UTCEPSS rescore
  23. 2026-06-15 17:44 UTCEPSS rescore
  24. 2026-06-14 23:13 UTCEPSS rescore
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  26. 2026-06-13 22:56 UTCEPSS rescore
  27. 2026-06-12 23:08 UTCEPSS rescore
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  29. 2026-06-10 22:14 UTCEPSS rescore
  30. 2026-06-10 13:17 UTCEPSS rescore
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  39. 2026-06-04 13:09 UTCEPSS rescore
  40. 2026-06-04 13:09 UTCEPSS rescore
  41. 2026-06-02 20:10 UTCEPSS rescore
  42. 2026-06-02 20:10 UTCEPSS rescore
  43. 2026-06-01 13:49 UTCEPSS rescore
  44. 2026-06-01 13:49 UTCEPSS rescore
  45. 2026-05-31 22:28 UTCEPSS rescore
  46. 2026-05-31 14:15 UTCEG score recompute
  47. 2026-05-31 14:15 UTCVendor advisory
  48. 2026-05-31 14:15 UTCGHSA enrichment
  49. 2026-05-31 00:13 UTCEPSS rescore
  50. 2026-05-31 00:13 UTCEPSS rescore
  51. 2026-05-29 13:40 UTCEPSS rescore
  52. 2026-05-29 13:40 UTCEPSS rescore
  53. 2026-05-28 13:42 UTCEPSS rescore
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  57. 2026-05-26 13:41 UTCEPSS rescore
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  59. 2026-05-26 07:16 UTCEPSS rescore
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  61. 2026-05-24 16:42 UTCEPSS rescore
  62. 2026-05-22 21:15 UTCEPSS rescore
  63. 2026-05-20 22:36 UTCEPSS rescore
  64. 2026-05-20 22:36 UTCEPSS rescore
  65. 2026-05-20 11:20 UTCEPSS rescore
  66. 2026-05-20 11:20 UTCEPSS rescore
  67. 2026-05-18 21:29 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2005-0109?
CVE-2005-0109 is a medium vulnerability published on March 5, 2005. Hyper-Threading technology, as used in FreeBSD and other operating systems that are run on Intel Pentium and other processors, allows local users to use a malicious thread to create covert channels, monitor the execution of other threads, and obtain sensitive information such as cryptographic keys,…
When was CVE-2005-0109 disclosed?
CVE-2005-0109 was first published on March 5, 2005, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2005-0109 actively exploited?
CVE-2005-0109 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (41st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2005-0109?
CVE-2005-0109 has a CVSS v3 base score of 5.6 (NVD).
How do I remediate CVE-2005-0109?
A fix for CVE-2005-0109 is available: update to the fixed version the vendor names in its advisory.

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