CVE-2019-19126

What it is

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.

At a glance

Exploitability

Can be exploited locally on the machine with a low-privilege account. Limited direct impact.

Exploit odds

0.4% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2019-11-19 22:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-14 07:16 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.4% in the next 30 days (EPSS).
• Severity: 3.3 LOW (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2019-11-19 22:15 UTC

Last modified

2026-10-14 07:16 UTC

Exploit probability

0.4% · EPSS, next 30 days

Weakness

CWE-665

Record status

Modified

Affected

• 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 Linux 10.0

Attack profile CVSS 3.1 · 3.3

Attack vector

Local

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2019-19126.md and follow it. Check whether this project is affected by CVE-2019-19126. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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