CVE-2016-6323

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Summary

CVECVE-2016-6323
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2016-10-07 14:59:06 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionThe makecontext function in the GNU C Library (aka glibc or libc6) before 2.25 creates execution contexts incompatible with the unwinder on ARM EABI (32-bit) platforms, which might allow context-dependent attackers to cause a denial of service (hang), as demonstrated by applications compiled using gccgo, related to backtrace generation.

Risk And Classification

Primary CVSS: v3.0 7.5 HIGH from [email protected]

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.011330000 probability, percentile 0.784680000 (date 2026-05-07)

Problem Types: CWE-284 | n/a

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary7.5HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
2.0[email protected]Primary5AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial

AV:N/AC:L/Au:N/C:N/I:N/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Fedoraproject Fedora 23 All All All
Operating System Fedoraproject Fedora 24 All All All
Operating System Fedoraproject Fedora 25 All All All
Application Gnu Glibc All All All All
Operating System Opensuse Opensuse 13.2 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
[SECURITY] Fedora 25 Update: glibc-2.24-3.fc25 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
20435 – (CVE-2016-6323) Missing unwind info in __startcontext causes infinite loop in _Unwind_Backtrace (CVE-2016-6323) af854a3a-2127-422b-91ae-364da2661108 sourceware.org Issue Tracking
sourceware.org Git - glibc.git/commit af854a3a-2127-422b-91ae-364da2661108 sourceware.org
GNU C Library: Multiple vulnerabilities (GLSA 201706-19) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org
openSUSE-SU-2016:2443-1: moderate: Security update for glibc af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Third Party Advisory
IBM Security Bulletin: Vulnerabilities in OpenSSL, OpenVPN and GNU glibc affect IBM Security Virtual Server Protection for VMware - United States af854a3a-2127-422b-91ae-364da2661108 www-01.ibm.com
[SECURITY] Fedora 24 Update: glibc-2.23.1-10.fc24 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 23 Update: glibc-2.22-18.fc23 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
oss-security - CVE-2016-6323: Missing unwind information on ARM EABI (32-bit) causes backtrace generation to hang af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Third Party Advisory
GNU glibc CVE-2016-6323 Infinite Loop Denial of Service Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
sourceware.org Git - glibc.git/commit MITRE sourceware.org
[SECURITY] Fedora 25 Update: glibc-2.24-3.fc25 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 24 Update: glibc-2.23.1-10.fc24 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 23 Update: glibc-2.22-18.fc23 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 670286 EulerOS Security Update for glibc (EulerOS-SA-2021-1790)
  • 670842 EulerOS Security Update for glibc (EulerOS-SA-2021-1790)
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