CVE-2019-19126

Name: CVE-2019-19126
Creator: NVD / NIST
Published: 2019-11-19T22:15:11.427+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.3/10EPSS 0.41%

Last modified Jun 17, 2026

CVE-2019-19126 is a low-severity vulnerability rated 3.3/10 on the CVSS scale. On the x86-64 architecture, the GNU C Library (aka glibc) before 2.31 fails to ignore the LD_PREFER_MAP_32BIT_EXEC environment variable during program execution after a security transition, allowing local attackers to restrict the possible mapping addresses for loaded libraries and thus bypass ASLR for a setuid program.. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

Description

On the x86-64 architecture, the GNU C Library (aka glibc) before 2.31 fails to ignore the LD_PREFER_MAP_32BIT_EXEC environment variable during program execution after a security transition, allowing local attackers to restrict the possible mapping addresses for loaded libraries and thus bypass ASLR for a setuid program.

Metrics

CVSS 3.1

3.3/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

0.41%

32.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-665

Affected Software

Vendor	Product	Versions
Gnu	Glibc	< 2.31
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	19.10
Fedoraproject	Fedora	30
Fedoraproject	Fedora	31
Debian	Debian Linux	10.0

References

https://lists.debian.org/debian-lts-announce/2022/10/msg00021.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4FQ5LC6JOYSOYFPRUZ4S45KL6IP3RPPZ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZFJ5E7NWOL6ROE5QVICHKIOUGCPFJVUH/
https://sourceware.org/bugzilla/show_bug.cgi?id=25204Issue Tracking, Patch, Third Party Advisory
https://usn.ubuntu.com/4416-1/Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00021.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4FQ5LC6JOYSOYFPRUZ4S45KL6IP3RPPZ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZFJ5E7NWOL6ROE5QVICHKIOUGCPFJVUH/
https://sourceware.org/bugzilla/show_bug.cgi?id=25204Issue Tracking, Patch, Third Party Advisory
https://usn.ubuntu.com/4416-1/Third Party Advisory

Timeline

Published: Nov 19, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-19126?

How severe is CVE-2019-19126?

CVE-2019-19126 has a CVSS score of 3.3/10 (LOW severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2019-19126?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-19126?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST