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low 3.3

CVE-2019-19126 json

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 dur…

published 6y ago modified 26d ago also EUVD-2019-8759

cvss
3.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits
0
none known

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.

Patch / fix

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP V3.1.5
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • glibc Debian 14, Debian 13, Debian 12 2.29-8

debian advisories DEBIAN-CVE-2019-19126

  • glibc Ubuntu 16.04 LTS 2.23-0ubuntu11.2
  • glibc Ubuntu 18.04 LTS 2.27-3ubuntu1.2

ubuntu advisories UBUNTU-CVE-2019-19126

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • glibc RHEL 7 2.17-317.el7
  • nscd RHEL 7 2.17-317.el7
  • glibc-utils RHEL 7 2.17-317.el7
  • glibc-common RHEL 7 2.17-317.el7
  • glibc-debuginfo-common RHEL 7 2.17-317.el7
  • glibc RHEL 8 2.28-101.el8
  • nscd RHEL 8 2.28-101.el8
  • libnsl RHEL 8 2.28-101.el8

red hat advisories RHSA-2020:3861RHSA-2020:1828

  • glibc SLE Module for Development Tools 15 SP1, SLE Module for Development Tools 15, SLE Module for Basesystem 15 SP1 +1 more 2.26-13.36.1

suse advisories SUSE-SU-2020:0262-1

  • glibc openSUSE Tumbleweed 2.34-1.2

opensuse advisories openSUSE-SU-2024:10792-1

Is CVE-2019-19126 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-19126 updated cvss 2.9

glibc: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid binaries

  • Red Hat Enterprise Linux 5 glibc Red Hat Enterprise Linux 6 nscd, glibc, glibc-utils, glibc-common
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Do 1 openshiftdo/odo-init-image-rhel7 1.1.3-2
    fixed: vendor fix RHSA-2021:0949
  • Red Hat CodeReady Linux Builder (v. 8) nss_hesiod 2.28-101.el8, glibc-benchtests 2.28-101.el8, glibc-debuginfo-common 2.28-101.el8 Red Hat Enterprise Linux AppStream (v. 8) glibc-utils 2.28-101.el8, glibc-debuginfo-common 2.28-101.el8, compat-libpthread-nonshared 2.28-101.el8 Red Hat Enterprise Linux BaseOS (v. 8) nscd 2.28-101.el8, glibc 2.28-101.el8, libnsl 2.28-101.el8, nss_db 2.28-101.el8, glibc-common 2.28-101.el8, glibc-all-langpacks 2.28-101.el8, +3 more
    fixed: vendor fix RHSA-2020:1828
  • Red Hat Enterprise Linux Client (v. 7) nscd 2.17-317.el7, glibc 2.17-317.el7, glibc-utils 2.17-317.el7, glibc-common 2.17-317.el7, glibc-debuginfo-common 2.17-317.el7 Red Hat Enterprise Linux Client Optional (v. 7) glibc-debuginfo-common 2.17-317.el7 Red Hat Enterprise Linux ComputeNode (v. 7) nscd 2.17-317.el7, glibc 2.17-317.el7, glibc-utils 2.17-317.el7, glibc-common 2.17-317.el7, glibc-debuginfo-common 2.17-317.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) glibc-debuginfo-common 2.17-317.el7 Red Hat Enterprise Linux Server (v. 7) nscd 2.17-317.el7, glibc 2.17-317.el7, glibc-utils 2.17-317.el7, glibc-common 2.17-317.el7, glibc-debuginfo-common 2.17-317.el7 Red Hat Enterprise Linux Server Optional (v. 7) glibc-debuginfo-common 2.17-317.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) nscd 2.17-317.el7, glibc 2.17-317.el7, glibc-utils 2.17-317.el7, glibc-common 2.17-317.el7, glibc-debuginfo-common 2.17-317.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) glibc-debuginfo-common 2.17-317.el7
    fixed: vendor fix RHSA-2020:3861

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-23-348-10 updated cvss 3.3

Siemens SIMATIC S7-1500

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.0, < 3.1.5
    affected: fixed in V3.1.5, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:P/I:N/A:N

Affected products

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.