CVE-2015-8777

Severity: medium (CVSS 5.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2016-01-20 · updated 2026-06-17
Weakness: CWE-254

Description

The process_envvars function in elf/rtld.c in the GNU C Library (aka glibc or libc6) before 2.23 allows local users to bypass a pointer-guarding protection mechanism via a zero value of the LD_POINTER_GUARD environment variable.

Affected products

GNU C Library (glibc): through 2.22

References

http://hmarco.org/bugs/glibc_ptr_mangle_weakness.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00036.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00037.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00038.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00039.html
http://www.debian.org/security/2016/dsa-3480
http://www.openwall.com/lists/oss-security/2016/01/20/1
http://www.securityfocus.com/bid/81469
http://www.securitytracker.com/id/1034811
http://www.ubuntu.com/usn/USN-2985-1
http://www.ubuntu.com/usn/USN-2985-2

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