Public Date:
1672232: CVE-2019-7309 glibc: memcmp function incorrectly returns zero

The MITRE CVE dictionary describes this issue as:

In the GNU C Library (aka glibc or libc6) through 2.29, the memcmp function for the x32 architecture can incorrectly return zero (indicating that the inputs are equal) because the RDX most significant bit is mishandled.

Find out more about CVE-2019-7309 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue did not affect the versions of glibc as shipped with Red Hat Enterprise Linux as they did not include support for 32bit architectures.

CVSS v3 metrics

NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.

CVSS3 Base Score 3.3
CVSS3 Base Metrics CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Impact None
Availability Impact Low

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 7 glibc Not affected
Red Hat Enterprise Linux 6 glibc Not affected
Red Hat Enterprise Linux 5 glibc Not affected
Last Modified

CVE description copyright © 2017, The MITRE Corporation