CVE-2015-7547

CRITICALNVD 8.19.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because EPSS predicts 90% probability of exploitation within the next 30 days (top 0.2% of all CVEs). NVD baseline CVSS 8.1 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Weaponized
9.0EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 90%
  • Public exploit code is available (Exploit-DB (verified), epss top5pct, epss high, public exploit)
CISA-KEV: Not listedEPSS PROB: 90%CVSS: 8.1Exploit: Exploit-DB (verified) · epss top5pct · epss high · public exploitExposed: 0

A fix is available — apply it.

Multiple stack-based buffer overflows in the (1) send_dg and (2) send_vc functions in the libresolv library in the GNU C Library (aka glibc or libc6) before 2.23 allow remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a crafted DNS response that triggers a call to the getaddrinfo function with the AF_UNSPEC or AF_INET6 address family, related to performing "dual A/AAAA DNS queries" and the libnss_dns.so.2 NSS module.

CVSS v3
8.1
EG Score
9.0(high)
EG Risk
81(Track)
EG Risk 81/100SSVC: 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
Severity90% × 45%
Exploitation90% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
90%
EPSS %ILE
100%
KEV
Not listed

Published

February 18, 2016

Last Modified

June 17, 2026

References (150)

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibc6 (2.15-0ubuntu10.13) @ precise2026-05-22ubuntu
redhatrhev-hypervisor7-0:7.2-20160105.2.el7ev2016-02-19redhat
redhatglibc-0:2.12-1.166.el6_7.72016-02-16redhat
redhatglibc-0:2.17-79.ael7b_1.42016-02-16redhat
redhatglibc-0:2.17-106.el7_2.42016-02-16redhat

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

(7 across 7 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
glibc—2.21-8—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
glibc—2.21-8—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
glibc—2.21-8—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
glibc—2.21-8—
Debian:6.0(1)
PackageVulnerable rangeFixed inDependents
eglibc2.11.2-10 ... 2.11.3-4 (10 versions)2.11.3-4+deb6u11—
Debian:7(1)
PackageVulnerable rangeFixed inDependents
eglibc2.13-38 ... 2.13-38+deb7u9 (10 versions)2.13-38+deb7u10—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
glibc2.19-18, 2.19-18+deb8u1, 2.19-18+deb8u22.19-18+deb8u3—

Weakness Classification(1)

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

All Vendor Advisories

(5)

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 1× in last 7d / 12× 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. 2026-08-19 16:59 UTCEPSS rescore
  2. 2026-08-14 13:54 UTCOSV refresh
  3. 2026-08-11 13:36 UTCEPSS rescore
  4. 2026-08-08 16:32 UTCEPSS rescore
  5. 2026-08-07 16:22 UTCEPSS rescore
  6. 2026-08-01 04:11 UTCEPSS rescore
  7. 2026-07-30 02:24 UTCOSV refresh
  8. 2026-07-30 01:26 UTCEPSS rescore
  9. 2026-07-30 01:26 UTCEPSS rescore
  10. 2026-07-24 14:13 UTCEPSS rescore
  11. 2026-07-23 01:19 UTCEG score recompute
  12. 2026-07-23 00:21 UTCEG score recompute
  13. 2026-07-22 21:59 UTCEG score recompute
  14. 2026-07-22 14:04 UTCEPSS rescore
  15. 2026-07-20 17:03 UTCEPSS rescore
  16. 2026-07-12 11:37 UTCOSV refresh
  17. 2026-07-08 15:10 UTCEPSS rescore
  18. 2026-07-01 15:02 UTCEPSS rescore
  19. 2026-06-28 04:53 UTCEPSS rescore
  20. 2026-06-27 03:05 UTCEPSS rescore
  21. 2026-06-25 13:47 UTCEPSS rescore
  22. 2026-06-25 13:47 UTCEPSS rescore
  23. 2026-06-23 21:30 UTCEPSS rescore
  24. 2026-06-23 17:00 UTCOSV refresh
  25. 2026-06-16 17:50 UTCEPSS rescore
Show 18 more
  1. 2026-06-16 17:50 UTCEPSS rescore
  2. 2026-06-15 17:45 UTCEPSS rescore
  3. 2026-06-06 22:59 UTCOSV refresh
  4. 2026-06-06 13:45 UTCEPSS rescore
  5. 2026-06-05 22:44 UTCEPSS rescore
  6. 2026-06-02 20:10 UTCEPSS rescore
  7. 2026-05-31 00:14 UTCEPSS rescore
  8. 2026-05-28 13:42 UTCEPSS rescore
  9. 2026-05-28 13:42 UTCEPSS rescore
  10. 2026-05-27 13:38 UTCEPSS rescore
  11. 2026-05-27 13:38 UTCEPSS rescore
  12. 2026-05-22 21:21 UTCEG score recompute
  13. 2026-05-22 21:21 UTCVendor advisory
  14. 2026-05-22 21:21 UTCGHSA enrichment
  15. 2026-05-20 22:37 UTCEPSS rescore
  16. 2026-05-20 22:37 UTCEPSS rescore
  17. 2026-05-18 21:30 UTCEPSS rescore
  18. 2026-05-18 21:30 UTCEPSS rescore

Publicly available exploits

(6 references)

Working exploit code is in the public domain (4 GitHub PoCs) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-40339
    First seen Sep 6, 2016

    glibc - 'getaddrinfo' Remote Stack Buffer Overflow

    Open source ↗
  • GitHub PoCeSentire/cve-2015-7547-public
    First seen Apr 5, 2016

    PoC attack server for CVE-2015-7547 buffer overflow vulnerability in glibc DNS stub resolver (public version)

    Open source ↗
  • GitHub PoCjgajek/cve-2015-7547
    First seen Mar 10, 2016

    PoC exploit server for CVE-2015-7547

    Open source ↗
  • GitHub PoCcakuzo/CVE-2015-7547
    First seen Feb 17, 2016

    test script for CVE-2015-7547

    Open source ↗
  • Exploit-DBEDB-39454✓ verified
    First seen Feb 16, 2016

    glibc - 'getaddrinfo' Stack Buffer Overflow (PoC)

    Open source ↗
  • GitHub PoCfjserna/CVE-2015-7547
    First seen Feb 10, 2016

    Proof of concept for CVE-2015-7547

    Open source ↗

Frequently asked(5)

What is CVE-2015-7547?
CVE-2015-7547 is a critical vulnerability published on February 18, 2016. Multiple stack-based buffer overflows in the (1) senddg and (2) sendvc functions in the libresolv library in the GNU C Library (aka glibc or libc6) before 2.23 allow remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a crafted DNS response that triggers a…
When was CVE-2015-7547 disclosed?
CVE-2015-7547 was first published in the National Vulnerability Database on February 18, 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-2015-7547 actively exploited?
CVE-2015-7547 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 90% probability of exploitation in the next 30 days, which ranks it in the top 0.2% of all scored CVEs.
What is the CVSS score of CVE-2015-7547?
CVE-2015-7547 has a CVSS v3 base score of 8.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
How do I remediate CVE-2015-7547?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-7547, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2015-7547

Explore →

Is Your Infrastructure Affected by CVE-2015-7547?

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

Start Free Scan →Browse All CVEs