CVE-2016-7951

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Multiple integer overflows in X.org libXtst before 1.2.3 allow remote X servers to trigger out-of-bounds memory access operations by leveraging the lack of range checks.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: 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%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
84%
KEV
Not listed

Published

December 13, 2016

Last Modified

June 17, 2026

Advisory Details (8)

Auto-updated Sep 15, 2026
No patch confirmed yet.
generic

oss-security - Re: X.Org security advisory: Protocol handling issues in X Window System client libraries

http://www.openwall.com/lists/oss-security/2016/10/04/4
generic

oss-security - X.Org security advisory: Protocol handling issues in X Window System client libraries

http://www.openwall.com/lists/oss-security/2016/10/04/2
generic

X.Org security advisory: Protocol handling issues in X Window System client libraries

https://lists.x.org/archives/xorg-announce/2016-October/002720.html
generic

[SECURITY] Fedora 25 Update: libXtst-1.2.3-1.fc25 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RVEUZRHYY3AJEKMFQ4DS7DX3Y2AICFP7/
generic

[SECURITY] Fedora 24 Update: libXtst-1.2.3-1.fc24 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AFLHX7WNEUXXDAGR324T35L5P6RRR7GE/
generic

CVE-2016-7951 - PSIRT.COM

http://www.securityfocus.com/bid/93370
generic
http://www.securitytracker.com/id/1036945
generic

Out of boundary access and endless loop in libXtst - xorg/lib/libXtst - X.org libXtst library. (mirrored from https://gitlab.freedesktop.org/xorg/lib/libxtst)

https://cgit.freedesktop.org/xorg/lib/libXtst/commit/?id=9556ad67af3129ec4a7a4f4b54a0d59701beeae3

Affected Packages

(7 across 7 ecosystems)
Alpine:v3.2(1)
PackageVulnerable rangeFixed inDependents
libxtst1.0.3-r0 ... 1.2.2-r0 (11 versions)1.2.2-r1—
Alpine:v3.3(1)
PackageVulnerable rangeFixed inDependents
libxtst1.0.3-r0 ... 1.2.2-r0 (11 versions)1.2.2-r1—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libxtst—2:1.2.3-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libxtst—2:1.2.3-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libxtst—2:1.2.3-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libxtst—2:1.2.3-1—
Debian:7(1)
PackageVulnerable rangeFixed inDependents
libxtst2:1.2.1-1, 2:1.2.1-1+deb7u12:1.2.1-1+deb7u2—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 22× 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 155 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2016-7951?
CVE-2016-7951 is a critical vulnerability published on December 13, 2016. Multiple integer overflows in X.org libXtst before 1.2.3 allow remote X servers to trigger out-of-bounds memory access operations by leveraging the lack of range checks.
When was CVE-2016-7951 disclosed?
CVE-2016-7951 was first published in the National Vulnerability Database on December 13, 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-2016-7951 actively exploited?
CVE-2016-7951 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 16.5% of all scored CVEs.
What is the CVSS score of CVE-2016-7951?
CVE-2016-7951 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-7951?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-7951, 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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