CVE-2016-6323

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-10-07 · updated 2026-06-17
Weakness: CWE-284

Description

The 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.

Affected products

Fedoraproject Fedora: 23, 24, 25
GNU C Library (glibc): through 2.24
Opensuse: 13.2

References

http://lists.opensuse.org/opensuse-updates/2016-10/msg00009.html
http://www-01.ibm.com/support/docview.wss?uid=swg21995039
http://www.openwall.com/lists/oss-security/2016/08/18/12
http://www.securityfocus.com/bid/92532
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KTXSOVCRDGBIB4WCIDAGYYUBESXZ4IGK/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LVWSAZVBTLALXF4SCBPDV3FY6J22DXLZ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WO7IMEYWZ2WTXGGMZBWWSDCUMFN63XOB/
https://security.gentoo.org/glsa/201706-19
https://sourceware.org/bugzilla/show_bug.cgi?id=20435
https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=9e2ff6c9cc54c0b4402b8d49e4abe7000fde7617
http://lists.opensuse.org/opensuse-updates/2016-10/msg00009.html
http://www-01.ibm.com/support/docview.wss?uid=swg21995039

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