Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | glibc | 2.21-8 | — |
| Debian 13 | glibc | 2.21-8 | — |
| Debian 12 | glibc | 2.21-8 | — |
| Debian 8 | glibc | 2.19-18+deb8u3 | DSA-3481-1 |
| Debian 7 | eglibc | 2.13-38+deb7u10 | DSA-3480-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 6.0 | eglibc | 2.11.3-4+deb6u11 | DLA-416-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | eglibc | 2.19-0ubuntu6.7 | USN-2900-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | nscd +7 | 2.17-106.el7_2.4 | RHSA-2016:0176 |
| RHEL 7 | rhev-hypervisor7 | 7.2-20160105.2.el7ev | RHSA-2016:0277 |
| RHEL 6 | nscd +7 | 2.12-1.166.el6_7.7 | RHSA-2016:0175 |
| RHEL 6 | rhev-hypervisor6 | 6.7-20160104.2.el6ev | RHSA-2016:0277 |
| RHEL 6 | rhev-hypervisor7 | 7.2-20160105.2.el6ev | RHSA-2016:0277 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Mission Critical 6 | nscd +7 | 2.12-1.47.el6_2.17 | RHSA-2016:0225 |
| RHEL 7.1 EUS | nscd +7 | 2.17-79.ael7b_1.4 | RHSA-2016:0225 |
| RHEL 6.6 EUS | nscd +7 | 2.12-1.149.el6_6.11 | RHSA-2016:0225 |
| RHEL 6.5 AUS | nscd +7 | 2.12-1.132.el6_5.7 | RHSA-2016:0225 |
| RHEL 6.4 AUS | nscd +7 | 2.12-1.107.el6_4.9 | RHSA-2016:0225 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | glibc | 2.19-35.1 | SUSE-SU-2016:0471-1 |
| SLES 12 | certification-sles-eal4 | 12.0-0.16.1 | SUSE-RU-2016:0496-1 |
| SLES 12 | glibc | 2.19-22.13.1 | SUSE-SU-2016:0473-1 |
| SLES 11 SP4 | glibc | 2.11.3-17.95.2 | SUSE-SU-2016:0472-1 |
| SLES 11 SP3 | glibc | 2.11.3-17.95.2 | SUSE-SU-2016:0472-1 |
| SLES 11 SP2 | glibc | 2.11.3-17.45.66.1 | SUSE-SU-2016:0470-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | glibc | 2.19-35.1 | SUSE-SU-2016:0471-1 |
| SLES for SAP 12 | certification-sles-eal4 | 12.0-0.16.1 | SUSE-RU-2016:0496-1 |
| SLES for SAP 12 | glibc | 2.19-22.13.1 | SUSE-SU-2016:0473-1 |
| SLES for SAP 11 SP4 | glibc | 2.11.3-17.95.2 | SUSE-SU-2016:0472-1 |
| SLES for SAP 11 SP3 | glibc | 2.11.3-17.95.2 | SUSE-SU-2016:0472-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | glibc | 2.24-2.3 | openSUSE-SU-2024:10154-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | nscd +6 | 2.17-106.0.1.el7_2.4 | ELSA-2016-0176 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 2
- glibc - 'getaddrinfo' Remote Stack Buffer Overflow EDB-40339 · remote · Sep 6, 2016
- glibc - 'getaddrinfo' Stack Buffer Overflow (PoC) EDB-39454 · dos · Feb 16, 2016 · verified
GitHub 12 repositories · most starred shown
-
fjserna/CVE-2015-7547 ★ 543 · Feb 10, 2016
Proof of concept for CVE-2015-7547
-
eSentire/cve-2015-7547-public ★ 10 · Apr 5, 2016
PoC attack server for CVE-2015-7547 buffer overflow vulnerability in glibc DNS stub resolver (public version)
-
jgajek/cve-2015-7547 ★ 8 · Mar 10, 2016
PoC exploit server for CVE-2015-7547
-
cakuzo/CVE-2015-7547 ★ 5 · Feb 17, 2016
test script for CVE-2015-7547
-
t0r0t0r0/CVE-2015-7547 ★ 1 · Feb 17, 2016
-
Stick-U235/CVE-2015-7547-Research ★ 0 · Oct 24, 2019
CVE-2015-7547 initial research.
-
miracle03/CVE-2015-7547-master ★ 0 · Jun 4, 2019
loudong
-
bluebluelan/CVE-2015-7547-proj-master ★ 0 · Nov 10, 2016
-
babykillerblack/CVE-2015-7547 ★ 0 · Feb 21, 2016
glibc getaddrinfo stack-based buffer overflow
-
rexifiles/rex-sec-glibc ★ 0 · Feb 18, 2016
glibc check and update in light of CVE-2015-7547
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 17
- RHSA-2016:0277 Red Hat Security Advisory: rhev-hypervisor security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2016:0225 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2016:0176 Red Hat Security Advisory: glibc security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2016:0175 Red Hat Security Advisory: glibc security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-2900-1 eglibc, glibc vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-416-1 eglibc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3480-1 eglibc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3481-1 glibc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:0472-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0473-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0471-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0470-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-RU-2016:0496-1 Recommended update for certification-sles-eal4 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10154-1 glibc-2.24-2.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-16-103-01C Siemens Industrial Products glibc Library Vulnerability (Update C) CISA ICS & IT advisories · Jun 5, 2025
- WID-SEC-2023-0973 GNU libc: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 16, 2023
- ELSA-2016-0176 Critical: glibc security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 16, 2016
References
- 1035020 vdb-entry
- HPSBGN03582 vendor-advisory
- SUSE-SU-2016:0471 vendor-advisory
- RHSA-2016:0175 vendor-advisory
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05140858
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05125672
- https://blogs.sophos.com/2016/02/29/utm-up2date-9-319-released/
- https://sourceware.org/bugzilla/show_bug.cgi?id=18665
- HPSBGN03551 vendor-advisory
- RHSA-2016:0225 vendor-advisory
- FEDORA-2016-0f9e9a34ce vendor-advisory
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40161
- DSA-3481 vendor-advisory
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- openSUSE-SU-2016:0510 vendor-advisory
- USN-2900-1 vendor-advisory
- http://www.fortiguard.com/advisory/glibc-getaddrinfo-stack-overflow
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05376917
- RHSA-2016:0277 vendor-advisory
- openSUSE-SU-2016:0511 vendor-advisory
- https://googleonlinesecurity.blogspot.com/2016/02/cve-2015-7547-glibc-getaddrinfo-stack.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- https://security.netapp.com/advisory/ntap-20160217-0002/
- SUSE-SU-2016:0470 vendor-advisory
- https://blogs.sophos.com/2016/02/24/utm-up2date-9-355-released/
- https://support.lenovo.com/us/en/product_security/len_5450
- https://www.tenable.com/security/research/tra-2017-08
- http://www.vmware.com/security/advisories/VMSA-2016-0002.html
- HPSBGN03549 vendor-advisory
- 83265 vdb-entry
- http://fortiguard.com/advisory/glibc-getaddrinfo-stack-overflow
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158380
- GLSA-201602-02 vendor-advisory
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05128937
- HPSBGN03547 vendor-advisory
- SUSE-SU-2016:0472 vendor-advisory
- 40339 exploit
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05098877
- https://bto.bluecoat.com/security-advisory/sa114
- [libc-alpha] 20160216 [PATCH] CVE-2015-7547 --- glibc getaddrinfo() stack-based buffer overflow mailing-list
- SUSE-SU-2016:0473 vendor-advisory
- https://help.ecostruxureit.com/display/public/UADCO8x/StruxureWare+Data+Center+Operation+Software+Vulnerability+Fixes
- http://packetstormsecurity.com/files/135802/glibc-getaddrinfo-Stack-Based-Buffer-Overflow.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1293532
- 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-c05390722
- 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-c05053211
- http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c05028479
- https://support.f5.com/kb/en-us/solutions/public/k/47/sol47098834.html
- RHSA-2016:0176 vendor-advisory
- FEDORA-2016-0480defc94 vendor-advisory
- openSUSE-SU-2016:0512 vendor-advisory
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04989404
- DSA-3480 vendor-advisory
- https://ics-cert.us-cert.gov/advisories/ICSA-16-103-01
- 39454 exploit
- http://support.citrix.com/article/CTX206991
- http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20160304-01-glibc-en