Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2019-19126

CVE-2019-19126LOW

n/a n/a — 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 d…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  L  N  N    3.3   .0041   33.9     —

AFFECTED
  Product  Versions  Fixed
  n/a      n/a –     —

TIMELINE
  Nov 19  Reserved by mitre
  Nov 19  Published (CNA: mitre)
  Oct 14  ENRICHED — CVE-2019-19126. Received CVSS 3.3 and CPE data from NVD.

CWE-665 · CNA: mitre · CVSS v3.1 · 6 references · NVD status: Modified

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
November 19, 2019	Reserved	Reserved by mitre
November 19, 2019	Published	Published (CNA: mitre)
October 14, 2026	ENRICHED	ENRICHED — CVE-2019-19126. Received CVSS 3.3 and CPE data from NVD.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	n/a	—	n/a	—

Weaknesses

CWE-665

References (6)

https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html [Mailing 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=25204 [Issue Tracking, Patch, Third Party Advisory]
https://usn.ubuntu.com/4416-1/ [Third Party Advisory]

Authoritative record: CVE-2019-19126 at cve.org

Weaknesses: CWE-665

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2019-19126 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.