CVE-2015-1779

HIGHNVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. 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: 7%CVSS: 8.6Exploit: None knownExposed: 0

A fix is available — apply it.

The VNC websocket frame decoder in QEMU allows remote attackers to cause a denial of service (memory and CPU consumption) via a large (1) websocket payload or (2) HTTP headers section.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
46(Track)
EG Risk 46/100SSVC: 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%
Exploitation7% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
7%
EPSS %ILE
94%
KEV
Not listed

Published

January 12, 2016

Last Modified

June 17, 2026

Advisory Details (5)

Auto-updated Sep 1, 2026
No patch confirmed yet.
generic

oss-security - Re: CVE-2015-1779 qemu: vnc: insufficient resource limiting in VNC websockets decoder

http://www.openwall.com/lists/oss-security/2015/04/09/6
generic

oss-security - CVE-2015-1779 qemu: vnc: insufficient resource limiting in VNC websockets decoder

http://www.openwall.com/lists/oss-security/2015/03/24/9
generic

[SECURITY] [DSA 3259-1] qemu security update

http://www.debian.org/security/2015/dsa-3259
generic
http://rhn.redhat.com/errata/RHSA-2015-1943.html
generic
http://rhn.redhat.com/errata/RHSA-2015-1931.html

Vendor Advisories for CVE-2015-1779(2)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuqemu-system-x86 (2.1+dfsg-4ubuntu6.6) @ utopic2026-05-22ubuntu
redhatqemu-kvm-10:1.5.3-86.el7_1.82015-10-27redhat
redhatqemu-kvm-rhev-10:2.1.2-23.el7_1.102015-10-26redhat

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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
qemu—1:2.3+dfsg-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
qemu—1:2.3+dfsg-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
qemu—1:2.3+dfsg-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
qemu—1:2.3+dfsg-1—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
qemu1:2.1+dfsg-11, 1:2.1+dfsg-12~bpo70+11:2.1+dfsg-12—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

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 / 20× 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 139 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2015-1779?
CVE-2015-1779 is a high vulnerability published on January 12, 2016. The VNC websocket frame decoder in QEMU allows remote attackers to cause a denial of service (memory and CPU consumption) via a large (1) websocket payload or (2) HTTP headers section.
When was CVE-2015-1779 disclosed?
CVE-2015-1779 was first published in the National Vulnerability Database on January 12, 2016, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-1779 actively exploited?
CVE-2015-1779 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7% probability of exploitation in the next 30 days, which ranks it in the top 5.9% of all scored CVEs.
What is the CVSS score of CVE-2015-1779?
CVE-2015-1779 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2015-1779?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-1779, 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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