CVE-2015-8390

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-17. 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: 5%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

PCRE before 8.38 mishandles the [: and \\ substrings in character classes, which allows remote attackers to cause a denial of service (uninitialized memory read) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.

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%
Exploitation5% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
5%
EPSS %ILE
91%
KEV
Not listed

Published

December 2, 2015

Last Modified

May 6, 2026

Advisory Details (5)

Auto-updated Aug 19, 2026
No patch confirmed yet.
generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20230216-0002/
generic

libpcre: Multiple Vulnerabilities (GLSA 201607-02) — Gentoo security

https://security.gentoo.org/glsa/201607-02
generic
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
generic

CVE-2015-8394 - PSIRT.COM

http://www.securityfocus.com/bid/82990
generic

oss-security - Re: Heap Overflow in PCRE

http://www.openwall.com/lists/oss-security/2015/11/29/1

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupcregrep (1:8.31-2ubuntu2.2) @ trusty2026-05-20ubuntu

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.

Affected Packages

(2 across 2 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
pcre3—2:8.38-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
pcre3—2:8.38-1—

All Vendor Advisories

(1)

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 6× in last 7d / 26× 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 135 total refreshes for this CVE.

  1. 2026-08-20 22:50 UTCEPSS rescore
  2. 2026-08-19 16:59 UTCEPSS rescore
  3. 2026-08-18 13:43 UTCEPSS rescore
  4. 2026-08-16 14:51 UTCEPSS rescore
  5. 2026-08-16 02:09 UTCEPSS rescore
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  7. 2026-08-12 13:46 UTCEPSS rescore
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  9. 2026-08-10 05:40 UTCOSV refresh
  10. 2026-08-08 16:32 UTCEPSS rescore
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  21. 2026-07-25 14:13 UTCEPSS rescore
  22. 2026-07-25 06:11 UTCOSV refresh
  23. 2026-07-24 14:13 UTCEPSS rescore
  24. 2026-07-23 14:14 UTCEPSS rescore
  25. 2026-07-23 01:20 UTCEG score recompute
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  1. 2026-07-23 00:21 UTCEG score recompute
  2. 2026-07-22 21:59 UTCEG score recompute
  3. 2026-07-22 14:04 UTCEPSS rescore
  4. 2026-07-21 15:21 UTCEPSS rescore
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  6. 2026-07-20 17:03 UTCEPSS rescore
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  18. 2026-07-12 05:42 UTCEPSS rescore
  19. 2026-07-11 08:23 UTCEPSS rescore
  20. 2026-07-09 19:05 UTCEPSS rescore
  21. 2026-07-09 19:05 UTCEPSS rescore
  22. 2026-07-08 15:10 UTCEPSS rescore
  23. 2026-07-08 01:05 UTCOSV refresh
  24. 2026-07-07 13:42 UTCEPSS rescore
  25. 2026-07-07 13:42 UTCEPSS rescore
  26. 2026-07-06 16:24 UTCEPSS rescore
  27. 2026-07-06 02:20 UTCEPSS rescore
  28. 2026-07-05 02:26 UTCEPSS rescore
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  30. 2026-07-01 15:02 UTCEPSS rescore
  31. 2026-06-30 23:19 UTCEPSS rescore
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  36. 2026-06-25 13:47 UTCEPSS rescore
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  40. 2026-06-23 21:30 UTCEPSS rescore
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  45. 2026-06-19 19:23 UTCEPSS rescore
  46. 2026-06-19 19:23 UTCEPSS rescore
  47. 2026-06-19 12:55 UTCOSV refresh
  48. 2026-06-18 17:50 UTCEPSS rescore
  49. 2026-06-17 17:50 UTCEPSS rescore
  50. 2026-06-17 17:49 UTCEPSS rescore
  51. 2026-06-16 17:50 UTCEPSS rescore
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  54. 2026-06-14 23:14 UTCEPSS rescore
  55. 2026-06-13 22:57 UTCEPSS rescore
  56. 2026-06-12 23:09 UTCEPSS rescore
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  58. 2026-06-11 13:57 UTCEPSS rescore
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  60. 2026-06-10 22:15 UTCEPSS rescore
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  70. 2026-05-31 22:28 UTCEPSS rescore
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  72. 2026-05-31 00:14 UTCEPSS rescore
  73. 2026-05-30 20:53 UTCOSV refresh
  74. 2026-05-29 13:41 UTCEPSS rescore
  75. 2026-05-28 13:42 UTCEPSS rescore

Frequently asked(5)

What is CVE-2015-8390?
CVE-2015-8390 is a critical vulnerability published on December 2, 2015. PCRE before 8.38 mishandles the [: and \\ substrings in character classes, which allows remote attackers to cause a denial of service (uninitialized memory read) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by…
When was CVE-2015-8390 disclosed?
CVE-2015-8390 was first published in the National Vulnerability Database on December 2, 2015, 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-2015-8390 actively exploited?
CVE-2015-8390 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5% probability of exploitation in the next 30 days, which ranks it in the top 9.0% of all scored CVEs.
What is the CVSS score of CVE-2015-8390?
CVE-2015-8390 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2015-8390?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-8390, 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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