CVE-2015-7547

Exp

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.

Published: 2016-02-18 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-7547 is rated High Exploit Risk (82.3/100): CVSS High severity, with high exploitation likelihood (EPSS 93.91%, 100th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2015-7547

EDB-ID Source Kind Published Link
40339 exploit_db edb 2016-09-06 Exploit-DB ↗
39454 exploit_db edb 2016-02-16 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2015-7547

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-27 93.95% 93.91% -0.05%
2 2026-04-05 93.91% 93.95% +0.04%
3 2026-03-14 — 93.91% —

Full EPSS history (40 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-7547

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.1 3.0 HIGH
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 5.9 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2015-7547

OS Trackers for CVE-2015-7547

vendor priority summary link
debian not yet assigned CVE-2015-7547 not yet assigned priority: Debian including 1 source packages (glibc), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2015-7547
gentoo high CVE-2015-7547: 1 GLSA(s) (201602-02), 1 atom(s) (sys-libs/glibc); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2015-7547
redhat critical — https://access.redhat.com/security/cve/CVE-2015-7547
suse high CVE-2015-7547 severity important: SUSE including 567 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 866 product×package rows across 75 product lines (HPE Helion OpenStack 8, SUSE Liberty Linux 7, … (75 product lines)): Fixed 594, Known Affected 157, Known Not Affected 115. https://www.suse.com/security/cve/CVE-2015-7547/
ubuntu high CVE-2015-7547 high priority: Ubuntu including 2 source packages (eglibc, glibc), 10 status rows across 5 suites (precise, trusty, upstream, vivid, wily): DNE 4, released 3, needs-triage 2, ignored 1. https://ubuntu.com/security/CVE-2015-7547

Affected software / configurations for CVE-2015-7547

Vendor Product Version Raw CPE
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
canonical ubuntu_linux 12.04 cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 15.10 cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*
hp helion_openstack 1.1.1 cpe:2.3:a:hp:helion_openstack:1.1.1:*:*:*:*:*:*:*
hp helion_openstack 2.0.0 cpe:2.3:a:hp:helion_openstack:2.0.0:*:*:*:*:*:*:*
hp helion_openstack 2.1.0 cpe:2.3:a:hp:helion_openstack:2.1.0:*:*:*:*:*:*:*
hp server_migration_pack 7.5 cpe:2.3:a:hp:server_migration_pack:7.5:*:*:*:*:*:*:*
sophos unified_threat_management_software 9.319 cpe:2.3:a:sophos:unified_threat_management_software:9.319:*:*:*:*:*:*:*
sophos unified_threat_management_software 9.355 cpe:2.3:a:sophos:unified_threat_management_software:9.355:*:*:*:*:*:*:*
suse linux_enterprise_debuginfo 11.0 cpe:2.3:a:suse:linux_enterprise_debuginfo:11.0:sp2:*:*:*:*:*:*
suse linux_enterprise_debuginfo 11.0 cpe:2.3:a:suse:linux_enterprise_debuginfo:11.0:sp3:*:*:*:*:*:*
suse linux_enterprise_debuginfo 11.0 cpe:2.3:a:suse:linux_enterprise_debuginfo:11.0:sp4:*:*:*:*:*:*
opensuse opensuse 13.2 cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
suse linux_enterprise_desktop 11.0 cpe:2.3:o:suse:linux_enterprise_desktop:11.0:sp3:*:*:*:*:*:*
suse linux_enterprise_desktop 11.0 cpe:2.3:o:suse:linux_enterprise_desktop:11.0:sp4:*:*:*:*:*:*
suse linux_enterprise_desktop 12 cpe:2.3:o:suse:linux_enterprise_desktop:12:*:*:*:*:*:*:*
suse linux_enterprise_desktop 12 cpe:2.3:o:suse:linux_enterprise_desktop:12:sp1:*:*:*:*:*:*
suse linux_enterprise_server 11.0 cpe:2.3:o:suse:linux_enterprise_server:11.0:sp2:*:*:lts:*:*:*
suse linux_enterprise_server 11.0 cpe:2.3:o:suse:linux_enterprise_server:11.0:sp3:*:*:*:*:*:*
suse linux_enterprise_server 11.0 cpe:2.3:o:suse:linux_enterprise_server:11.0:sp3:*:*:*:vmware:*:*
suse linux_enterprise_server 11.0 cpe:2.3:o:suse:linux_enterprise_server:11.0:sp4:*:*:*:*:*:*
suse linux_enterprise_server 12 cpe:2.3:o:suse:linux_enterprise_server:12:sp1:*:*:*:*:*:*
suse linux_enterprise_software_development_kit 11.0 cpe:2.3:o:suse:linux_enterprise_software_development_kit:11.0:sp3:*:*:*:*:*:*
suse linux_enterprise_software_development_kit 11.0 cpe:2.3:o:suse:linux_enterprise_software_development_kit:11.0:sp4:*:*:*:*:*:*
suse linux_enterprise_software_development_kit 12 cpe:2.3:o:suse:linux_enterprise_software_development_kit:12:*:*:*:*:*:*:*
suse linux_enterprise_software_development_kit 12 cpe:2.3:o:suse:linux_enterprise_software_development_kit:12:sp1:*:*:*:*:*:*
suse suse_linux_enterprise_server 12 cpe:2.3:o:suse:suse_linux_enterprise_server:12:*:*:*:*:*:*:*
oracle exalogic_infrastructure 1.0 cpe:2.3:a:oracle:exalogic_infrastructure:1.0:*:*:*:*:*:*:*
oracle exalogic_infrastructure 2.0 cpe:2.3:a:oracle:exalogic_infrastructure:2.0:*:*:*:*:*:*:*
f5 big-ip_access_policy_manager 12.0.0 cpe:2.3:a:f5:big-ip_access_policy_manager:12.0.0:*:*:*:*:*:*:*
f5 big-ip_advanced_firewall_manager 12.0.0 cpe:2.3:a:f5:big-ip_advanced_firewall_manager:12.0.0:*:*:*:*:*:*:*
f5 big-ip_analytics 12.0.0 cpe:2.3:a:f5:big-ip_analytics:12.0.0:*:*:*:*:*:*:*
f5 big-ip_application_acceleration_manager 12.0.0 cpe:2.3:a:f5:big-ip_application_acceleration_manager:12.0.0:*:*:*:*:*:*:*
f5 big-ip_application_security_manager 12.0.0 cpe:2.3:a:f5:big-ip_application_security_manager:12.0.0:*:*:*:*:*:*:*
f5 big-ip_domain_name_system 12.0.0 cpe:2.3:a:f5:big-ip_domain_name_system:12.0.0:*:*:*:*:*:*:*
f5 big-ip_link_controller 12.0.0 cpe:2.3:a:f5:big-ip_link_controller:12.0.0:*:*:*:*:*:*:*
f5 big-ip_local_traffic_manager 12.0.0 cpe:2.3:a:f5:big-ip_local_traffic_manager:12.0.0:*:*:*:*:*:*:*
f5 big-ip_policy_enforcement_manager 12.0.0 cpe:2.3:a:f5:big-ip_policy_enforcement_manager:12.0.0:*:*:*:*:*:*:*
oracle fujitsu_m10_firmware <= 2290 cpe:2.3:o:oracle:fujitsu_m10_firmware:*:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 7.0 cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_hpc_node 7.0 cpe:2.3:o:redhat:enterprise_linux_hpc_node:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_hpc_node_eus 7.2 cpe:2.3:o:redhat:enterprise_linux_hpc_node_eus:7.2:*:*:*:*:*:*:*
redhat enterprise_linux_server 7.0 cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_server_aus 7.2 cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:*:*:*:*:*:*:*
redhat enterprise_linux_server_eus 7.2 cpe:2.3:o:redhat:enterprise_linux_server_eus:7.2:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 7.0 cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
gnu glibc 2.9 cpe:2.3:a:gnu:glibc:2.9:*:*:*:*:*:*:*
gnu glibc 2.10 cpe:2.3:a:gnu:glibc:2.10:*:*:*:*:*:*:*
gnu glibc 2.10.1 cpe:2.3:a:gnu:glibc:2.10.1:*:*:*:*:*:*:*
gnu glibc 2.11 cpe:2.3:a:gnu:glibc:2.11:*:*:*:*:*:*:*
gnu glibc 2.11.1 cpe:2.3:a:gnu:glibc:2.11.1:*:*:*:*:*:*:*
gnu glibc 2.11.2 cpe:2.3:a:gnu:glibc:2.11.2:*:*:*:*:*:*:*
gnu glibc 2.11.3 cpe:2.3:a:gnu:glibc:2.11.3:*:*:*:*:*:*:*
gnu glibc 2.12 cpe:2.3:a:gnu:glibc:2.12:*:*:*:*:*:*:*
gnu glibc 2.12.1 cpe:2.3:a:gnu:glibc:2.12.1:*:*:*:*:*:*:*
gnu glibc 2.12.2 cpe:2.3:a:gnu:glibc:2.12.2:*:*:*:*:*:*:*
gnu glibc 2.13 cpe:2.3:a:gnu:glibc:2.13:*:*:*:*:*:*:*
gnu glibc 2.14 cpe:2.3:a:gnu:glibc:2.14:*:*:*:*:*:*:*
gnu glibc 2.14.1 cpe:2.3:a:gnu:glibc:2.14.1:*:*:*:*:*:*:*
gnu glibc 2.15 cpe:2.3:a:gnu:glibc:2.15:*:*:*:*:*:*:*
gnu glibc 2.16 cpe:2.3:a:gnu:glibc:2.16:*:*:*:*:*:*:*
gnu glibc 2.17 cpe:2.3:a:gnu:glibc:2.17:*:*:*:*:*:*:*
gnu glibc 2.18 cpe:2.3:a:gnu:glibc:2.18:*:*:*:*:*:*:*
gnu glibc 2.19 cpe:2.3:a:gnu:glibc:2.19:*:*:*:*:*:*:*
gnu glibc 2.20 cpe:2.3:a:gnu:glibc:2.20:*:*:*:*:*:*:*
gnu glibc 2.21 cpe:2.3:a:gnu:glibc:2.21:*:*:*:*:*:*:*
gnu glibc 2.22 cpe:2.3:a:gnu:glibc:2.22:*:*:*:*:*:*:*

References for CVE-2015-7547

URL Tags
http://fortiguard.com/advisory/glibc-getaddrinfo-stack-overflow
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177412.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00036.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00037.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00038.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00039.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00042.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00043.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00044.html Third Party Advisory
http://marc.info/?l=bugtraq&m=145596041017029&w=2
http://marc.info/?l=bugtraq&m=145672440608228&w=2
http://marc.info/?l=bugtraq&m=145690841819314&w=2
http://marc.info/?l=bugtraq&m=145857691004892&w=2
http://marc.info/?l=bugtraq&m=146161017210491&w=2
http://packetstormsecurity.com/files/135802/glibc-getaddrinfo-Stack-Based-Buffer-Overflow.html
http://packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.html
http://packetstormsecurity.com/files/164014/Moxa-Command-Injection-Cross-Site-Scripting-Vulnerable-Software.html
http://packetstormsecurity.com/files/167552/Nexans-FTTO-GigaSwitch-Outdated-Components-Hardcoded-Backdoor.html
http://rhn.redhat.com/errata/RHSA-2016-0175.html
http://rhn.redhat.com/errata/RHSA-2016-0176.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0225.html
http://rhn.redhat.com/errata/RHSA-2016-0277.html
http://seclists.org/fulldisclosure/2019/Sep/7
http://seclists.org/fulldisclosure/2021/Sep/0
http://seclists.org/fulldisclosure/2022/Jun/36
http://support.citrix.com/article/CTX206991
http://ubuntu.com/usn/usn-2900-1 Third Party Advisory
http://www.debian.org/security/2016/dsa-3480
http://www.debian.org/security/2016/dsa-3481 Third Party Advisory
http://www.fortiguard.com/advisory/glibc-getaddrinfo-stack-overflow
http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20160304-01-glibc-en
http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html Patch Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
http://www.securityfocus.com/bid/83265
http://www.securitytracker.com/id/1035020
http://www.vmware.com/security/advisories/VMSA-2016-0002.html
https://access.redhat.com/articles/2161461 Third Party Advisory
https://blogs.sophos.com/2016/02/24/utm-up2date-9-355-released/ Third Party Advisory
https://blogs.sophos.com/2016/02/29/utm-up2date-9-319-released/ Third Party Advisory
https://bto.bluecoat.com/security-advisory/sa114 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1293532 Issue Tracking Third Party Advisory
https://googleonlinesecurity.blogspot.com/2016/02/cve-2015-7547-glibc-getaddrinfo-stack.html
https://h20566.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c05028479 Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04989404 Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05008367
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05053211
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05073516
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05098877 Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05125672 Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05128937 Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05130958 Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05140858 Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158380
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05176716
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05212266
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05376917
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722
https://help.ecostruxureit.com/display/public/UADCO8x/StruxureWare+Data+Center+Operation+Software+Vulnerability+Fixes
https://ics-cert.us-cert.gov/advisories/ICSA-16-103-01
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40161 Third Party Advisory
https://kc.mcafee.com/corporate/index?page=content&id=SB10150 Third Party Advisory
https://seclists.org/bugtraq/2019/Sep/7
https://security.gentoo.org/glsa/201602-02 Third Party Advisory
https://security.netapp.com/advisory/ntap-20160217-0002/
https://sourceware.org/bugzilla/show_bug.cgi?id=18665 Issue Tracking
https://sourceware.org/ml/libc-alpha/2016-02/msg00416.html Mailing List Vendor Advisory
https://support.f5.com/kb/en-us/solutions/public/k/47/sol47098834.html Third Party Advisory
https://support.lenovo.com/us/en/product_security/len_5450
https://www.arista.com/en/support/advisories-notices/security-advisories/1255-security-advisory-17
https://www.exploit-db.com/exploits/39454/
https://www.exploit-db.com/exploits/40339/
https://www.kb.cert.org/vuls/id/457759
https://www.tenable.com/security/research/tra-2017-08
cvelogic Threat Intelligence