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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 …

Low CVSS 3.3
CVECVE-2019-19126
First seen2026-10-14 10:15 UTC
Disclosed2019-11-19 22:15 UTC
Last updated2026-10-14 10:15 UTC
Channel statusauto

Summary

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.

In-depth triage

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Affected products

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Sources

  • NVD DATABASE

Original Links

Timeline

  1. nvd_ingest NVD