CVE-2016-5770

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 7%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

Integer overflow in the SplFileObject::fread function in spl_directory.c in the SPL extension in PHP before 5.5.37 and 5.6.x before 5.6.23 allows remote attackers to cause a denial of service or possibly have unspecified other impact via a large integer argument, a related issue to CVE-2016-5096.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
93.7%
KEV
Not listed

Published

August 7, 2016

Last Modified

May 6, 2026

Advisory Details (7)

Auto-updated May 8, 2026
No patch confirmed yet.
generic

PHP :: Sec Bug #72262 :: int/size_t confusion in SplFileObject::fread

https://bugs.php.net/bug.php?id=72262
generic
http://www.securityfocus.com/bid/91403
generic

oss-security - Re: CVE for PHP 5.5.37 issues

http://www.openwall.com/lists/oss-security/2016/06/23/4
generic

[SECURITY] [DSA 3618-1] php5 security update

http://www.debian.org/security/2016/dsa-3618
generic
http://rhn.redhat.com/errata/RHSA-2016-2750.html
generic

PHP: PHP 5 ChangeLog

http://php.net/ChangeLog-5.php
generic

Fix bug #72262 - do not overflow int · php/php-src@7245bff · GitHub

http://github.com/php/php-src/commit/7245bff300d3fa8bacbef7897ff080a6f1c23eba?w=1

Vendor Advisories for CVE-2016-5770(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrh-php56-php-pear-1:1.9.5-4.el72016-11-15redhat

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.

Data Freshness Timeline

(refreshed 10× in last 7d / 34× 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. 2026-07-07 13:42 UTCEPSS rescore
  2. 2026-07-06 16:24 UTCEPSS rescore
  3. 2026-07-06 16:24 UTCEPSS rescore
  4. 2026-07-06 02:20 UTCEPSS rescore
  5. 2026-07-06 02:20 UTCEPSS rescore
  6. 2026-07-05 02:27 UTCEPSS rescore
  7. 2026-07-04 06:28 UTCEPSS rescore
  8. 2026-07-01 15:02 UTCEPSS rescore
  9. 2026-06-30 23:19 UTCEPSS rescore
  10. 2026-06-30 23:19 UTCEPSS rescore
  11. 2026-06-29 14:03 UTCEPSS rescore
  12. 2026-06-28 14:04 UTCEPSS rescore
  13. 2026-06-28 04:53 UTCEPSS rescore
  14. 2026-06-27 03:05 UTCEPSS rescore
  15. 2026-06-25 13:47 UTCEPSS rescore
  16. 2026-06-24 14:02 UTCEPSS rescore
  17. 2026-06-23 21:30 UTCEPSS rescore
  18. 2026-06-22 14:23 UTCEPSS rescore
  19. 2026-06-21 01:57 UTCEPSS rescore
  20. 2026-06-21 01:57 UTCEPSS rescore
  21. 2026-06-19 19:35 UTCOSV refresh
  22. 2026-06-18 17:50 UTCEPSS rescore
  23. 2026-06-18 17:50 UTCEPSS rescore
  24. 2026-06-17 17:50 UTCEPSS rescore
  25. 2026-06-17 17:50 UTCEPSS rescore
Show 65 more
  1. 2026-06-16 17:50 UTCEPSS rescore
  2. 2026-06-15 17:45 UTCEPSS rescore
  3. 2026-06-14 23:14 UTCEPSS rescore
  4. 2026-06-14 23:14 UTCEPSS rescore
  5. 2026-06-13 22:57 UTCEPSS rescore
  6. 2026-06-13 22:57 UTCEPSS rescore
  7. 2026-06-12 23:09 UTCEPSS rescore
  8. 2026-06-11 13:57 UTCEPSS rescore
  9. 2026-06-08 14:14 UTCEPSS rescore
  10. 2026-06-07 15:22 UTCEPSS rescore
  11. 2026-06-07 15:22 UTCEPSS rescore
  12. 2026-06-05 22:44 UTCEPSS rescore
  13. 2026-06-05 06:08 UTCEPSS rescore
  14. 2026-06-05 06:08 UTCEPSS rescore
  15. 2026-06-04 13:10 UTCEPSS rescore
  16. 2026-06-04 13:10 UTCEPSS rescore
  17. 2026-06-02 20:10 UTCEPSS rescore
  18. 2026-05-31 22:28 UTCEPSS rescore
  19. 2026-05-31 22:28 UTCEPSS rescore
  20. 2026-05-31 00:14 UTCEPSS rescore
  21. 2026-05-31 00:13 UTCOSV refresh
  22. 2026-05-29 13:41 UTCEPSS rescore
  23. 2026-05-28 13:42 UTCEPSS rescore
  24. 2026-05-28 13:42 UTCEPSS rescore
  25. 2026-05-27 13:38 UTCEPSS rescore
  26. 2026-05-27 13:38 UTCEPSS rescore
  27. 2026-05-26 13:42 UTCEPSS rescore
  28. 2026-05-26 13:42 UTCEPSS rescore
  29. 2026-05-24 16:44 UTCEPSS rescore
  30. 2026-05-22 21:15 UTCEPSS rescore
  31. 2026-05-20 22:37 UTCEPSS rescore
  32. 2026-05-20 22:37 UTCEPSS rescore
  33. 2026-05-20 22:37 UTCEPSS rescore
  34. 2026-05-20 11:21 UTCEPSS rescore
  35. 2026-05-20 11:21 UTCEPSS rescore
  36. 2026-05-20 09:38 UTCEG score recompute
  37. 2026-05-20 09:38 UTCVendor advisory
  38. 2026-05-20 09:38 UTCGHSA enrichment
  39. 2026-05-20 05:33 UTCEG score recompute
  40. 2026-05-20 05:33 UTCVendor advisory
  41. 2026-05-20 05:33 UTCGHSA enrichment
  42. 2026-05-20 01:27 UTCEG score recompute
  43. 2026-05-20 01:27 UTCVendor advisory
  44. 2026-05-20 01:27 UTCGHSA enrichment
  45. 2026-05-19 21:22 UTCEG score recompute
  46. 2026-05-19 21:22 UTCVendor advisory
  47. 2026-05-19 21:22 UTCGHSA enrichment
  48. 2026-05-19 17:16 UTCEG score recompute
  49. 2026-05-19 17:16 UTCVendor advisory
  50. 2026-05-19 17:16 UTCGHSA enrichment
  51. 2026-05-19 13:10 UTCEG score recompute
  52. 2026-05-19 13:10 UTCVendor advisory
  53. 2026-05-19 13:10 UTCGHSA enrichment
  54. 2026-05-19 09:04 UTCEG score recompute
  55. 2026-05-19 09:04 UTCVendor advisory
  56. 2026-05-19 09:04 UTCGHSA enrichment
  57. 2026-05-19 04:58 UTCEG score recompute
  58. 2026-05-19 04:58 UTCVendor advisory
  59. 2026-05-19 04:58 UTCGHSA enrichment
  60. 2026-05-19 00:53 UTCEG score recompute
  61. 2026-05-19 00:53 UTCVendor advisory
  62. 2026-05-19 00:53 UTCGHSA enrichment
  63. 2026-05-18 21:30 UTCEPSS rescore
  64. 2026-05-18 21:30 UTCEPSS rescore
  65. 2026-05-18 21:30 UTCEPSS rescore

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2016-5770?
CVE-2016-5770 is a critical vulnerability published on August 7, 2016. Integer overflow in the SplFileObject::fread function in spl_directory.c in the SPL extension in PHP before 5.5.37 and 5.6.x before 5.6.23 allows remote attackers to cause a denial of service or possibly have unspecified other impact via a large integer argument, a related issue to CVE-2016-5096.
When was CVE-2016-5770 disclosed?
CVE-2016-5770 was first published in the National Vulnerability Database on August 7, 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-2016-5770 actively exploited?
CVE-2016-5770 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 93.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2016-5770?
CVE-2016-5770 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-5770?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-5770, 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

Explore the affected products and dependency analysis for CVE-2016-5770

Explore →

Is Your Infrastructure Affected by CVE-2016-5770?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs