NVD / CVE Program· CNA mitre

CVE-2019-19126: 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 duri

Noroxi assessment

Priority: Monitor (action score 13/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.41% (FIRST EPSS).
Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: glibc (Debian:10) 2.28-10+deb10u2; glibc (Debian:12) 2.29-8; glibc (Red Hat:enterprise_linux:7::client) 0:2.17-317.el7.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to glibc (Debian:10) 2.28-10+deb10u2; glibc (Debian:12) 2.29-8; glibc (Red Hat:enterprise_linux:7::client) 0:2.17-317.el7 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

LowCVSS 3.3 · v3.1—No exploit Fix available

Published: Nov 19, 2019
Updated: Oct 14, 2026
EPSS: 0.4% · 35th percentile
CWE: CWE-665

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 13 / 40 · 3.3 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.4%

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
gnu	glibc	cpe:2.3:a:gnu:glibc
canonical	ubuntu linux	cpe:2.3:o:canonical:ubuntu_linux
fedoraproject	fedora	cpe:2.3:o:fedoraproject:fedora
debian	debian linux	cpe:2.3:o:debian:debian_linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

canonical ubuntu linux16.04
canonical ubuntu linux18.04
canonical ubuntu linux19.10
debian debian linux10.0
fedoraproject fedora30
fedoraproject fedora31
gnu glibcbefore 2.31

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:10	glibc	before 2.28-10+deb10u2	2.28-10+deb10u2
Debian:12	glibc	before 2.29-8	2.29-8
Red Hat:enterprise_linux:7::client	glibc	before 0:2.17-317.el7	0:2.17-317.el7
Red Hat:enterprise_linux:7::client	glibc-common	before 0:2.17-317.el7	0:2.17-317.el7
Red Hat:enterprise_linux:7::client	glibc-debuginfo	before 0:2.17-317.el7	0:2.17-317.el7
Red Hat:enterprise_linux:7::client	glibc-debuginfo-common	before 0:2.17-317.el7	0:2.17-317.el7
Red Hat:enterprise_linux:7::client	glibc-devel	before 0:2.17-317.el7	0:2.17-317.el7
Red Hat:enterprise_linux:7::client	glibc-headers	before 0:2.17-317.el7	0:2.17-317.el7
Red Hat:enterprise_linux:7::client	glibc-static	before 0:2.17-317.el7	0:2.17-317.el7
Red Hat:enterprise_linux:7::client	glibc-utils	before 0:2.17-317.el7	0:2.17-317.el7
Red Hat:enterprise_linux:7::client	nscd	before 0:2.17-317.el7	0:2.17-317.el7
Red Hat:enterprise_linux:8::appstream	compat-libpthread-nonshared	before 0:2.28-101.el8	0:2.28-101.el8
Red Hat:enterprise_linux:8::appstream	glibc-debuginfo	before 0:2.28-101.el8	0:2.28-101.el8
Red Hat:enterprise_linux:8::appstream	glibc-debuginfo-common	before 0:2.28-101.el8	0:2.28-101.el8
Red Hat:enterprise_linux:8::appstream	glibc-utils	before 0:2.28-101.el8	0:2.28-101.el8
Red Hat:enterprise_linux:8::baseos	glibc	before 0:2.28-101.el8	0:2.28-101.el8
Red Hat:enterprise_linux:8::baseos	glibc-all-langpacks	before 0:2.28-101.el8	0:2.28-101.el8
Red Hat:enterprise_linux:8::baseos	glibc-common	before 0:2.28-101.el8	0:2.28-101.el8
Red Hat:enterprise_linux:8::baseos	glibc-devel	before 0:2.28-101.el8	0:2.28-101.el8
Red Hat:enterprise_linux:8::baseos	glibc-headers	before 0:2.28-101.el8	0:2.28-101.el8
Red Hat:enterprise_linux:8::baseos	glibc-langpack-aa	before 0:2.28-101.el8	0:2.28-101.el8
Red Hat:enterprise_linux:8::baseos	glibc-langpack-af	before 0:2.28-101.el8	0:2.28-101.el8
Red Hat:enterprise_linux:8::baseos	glibc-langpack-agr	before 0:2.28-101.el8	0:2.28-101.el8
Red Hat:enterprise_linux:8::baseos	glibc-langpack-ak	before 0:2.28-101.el8	0:2.28-101.el8

+96

Same product

gnu: all records

Other highest-scoring records for the same primary product.

CVE-2023-4911Glibc: buffer overflow in ld.so leading to privilege escalationKEV
80Now
CVE-2015-0235Heap-based buffer overflow in the __nss_hostname_digits_dots function in glibc 2.2, and other 2.x versions before 2.18, allows context-depen
68This week
CVE-2015-7547Multiple stack-based buffer overflows in the (1) send_dg and (2) send_vc functions in the libresolv library in the GNU C Library (aka glibc
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Published before and after this one in the same product

← EarlierCVE-2019-1010024Jul 15, 2019 · GNU Libc current is affected by: Mitigation bypass.
22Monitor
← EarlierCVE-2019-1010025Jul 15, 2019 · GNU Libc current is affected by: Mitigation bypass.
22Monitor
Later →CVE-2020-10029Mar 4, 2020 · The GNU C Library (aka glibc or libc6) before 2.32 could overflow an on-stack buffer during range reduction if an input to an 80-bit long do
22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
debian:glibc	2.29-8 · Debian:12	Package registry (OSV)
red hat:compat-libpthread-nonshared	0:2.28-101.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:glibc	0:2.28-101.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
red hat:glibc-all-langpacks	0:2.28-101.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
red hat:glibc-common	0:2.28-101.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
red hat:glibc-debuginfo	0:2.28-101.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:glibc-debuginfo-common	0:2.28-101.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:glibc-devel	0:2.28-101.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
red hat:glibc-headers	0:2.28-101.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
red hat:glibc-langpack-aa	0:2.28-101.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
red hat:glibc-langpack-af	0:2.28-101.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
red hat:glibc-langpack-agr	0:2.28-101.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
red hat:glibc-utils	0:2.28-101.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
suse:glibc	2.26-13.36.1 · SUSE:Linux Enterprise Module for Basesystem 15	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-20-905 · Oct 30, 2020(OpenShift Güvenlik Güncellemesi)

All national notices →

Technical details

Attack conditions

Someone with local access to the system can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: low · data can be read
Integrity: none
Availability: none

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: Low
Integrity impact: None
Availability impact: None

Weakness class (CWE)

CWE-665 · Improper Initialization

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log

Fix✗ → ✓Sep 28, 2026, 10:45 PM UTC

For records you follow, these changes also arrive as notifications. →

References

lists.debian.org/debian-lts-announce/2022/10/msg00021.html

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records