CVE-2016-3955

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-17. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 26%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

The usbip_recv_xbuff function in drivers/usb/usbip/usbip_common.c in the Linux kernel before 4.5.3 allows remote attackers to cause a denial of service (out-of-bounds write) or possibly have unspecified other impact via a crafted length value in a USB/IP packet.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
65(Track*)
EG Risk 65/100SSVC: 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
Severity98% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
97.8%
KEV
Not listed

Published

July 3, 2016

Last Modified

May 6, 2026

Advisory Details (5)

Auto-updated May 9, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic
http://www.securityfocus.com/bid/86534
generic

oss-security - CVE Request: Linux kernel: remote buffer overflow in usbip

http://www.openwall.com/lists/oss-security/2016/04/19/1
generic🔴 Active Exploitation
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.3
generic

[SECURITY] [DSA 3607-1] linux security update

http://www.debian.org/security/2016/dsa-3607
generic

USB: usbip: fix potential out-of-bounds write - kernel/git/torvalds/linux.git - Linux kernel source tree

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b348d7dddb6c4fbfc810b7a0626e8ec9e29f7cbb

Patch Availability(13)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-extra-3.19.0-61-generic (3.19.0-61.69~14.04.1) @ trusty2026-05-20ubuntu
ubuntulinux-image-extra-3.16.0-73-generic (3.16.0-73.95~14.04.1) @ trusty2026-05-20ubuntu
ubuntulinux-image-4.2.0-38-generic (4.2.0-38.45) @ wily2026-05-20ubuntu
ubuntulinux-image-3.2.0-104-powerpc64-smp (3.2.0-104.145) @ precise2026-05-20ubuntu
ubuntulinux-image-4.4.0-1010-raspi2 (4.4.0-1010.12) @ xenial2026-05-20ubuntu
ubuntulinux-image-3.2.0-1482-omap4 (3.2.0-1482.109) @ precise2026-05-20ubuntu
ubuntulinux-image-extra-3.13.0-87-generic (3.13.0-87.133) @ trusty2026-05-20ubuntu
ubuntulinux-image-4.4.0-1013-snapdragon (4.4.0-1013.14) @ xenial2026-05-20ubuntu
ubuntulinux-image-extra-4.4.0-22-generic (4.4.0-22.39) @ xenial2026-05-20ubuntu
ubuntulinux-image-extra-4.2.0-38-generic (4.2.0-38.45~14.04.1) @ trusty2026-05-20ubuntu
ubuntulinux-image-extra-4.4.0-22-generic (4.4.0-22.39~14.04.1) @ trusty2026-05-20ubuntu
ubuntulinux-image-3.13.0-88-generic (3.13.0-88.135~precise1) @ precise2026-05-20ubuntu
ubuntulinux-image-4.2.0-1031-raspi2 (4.2.0-1031.41) @ wily2026-05-20ubuntu

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

(13)

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 11× in last 7d / 37× 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 112 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

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

  • GitHub PoCpqsec/uboatdemo
    First seen Mar 29, 2017

    A demo server for CVE-2016-3955 (UBOAT)

    Open source ↗

Frequently asked(5)

What is CVE-2016-3955?
CVE-2016-3955 is a critical vulnerability published on July 3, 2016. The usbiprecvxbuff function in drivers/usb/usbip/usbip_common.c in the Linux kernel before 4.5.3 allows remote attackers to cause a denial of service (out-of-bounds write) or possibly have unspecified other impact via a crafted length value in a USB/IP packet.
When was CVE-2016-3955 disclosed?
CVE-2016-3955 was first published in the National Vulnerability Database on July 3, 2016, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-3955 actively exploited?
CVE-2016-3955 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 97.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2016-3955?
CVE-2016-3955 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-3955?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-3955, 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.

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