Skip to content
Fencer Vulns
critical 9.8

CVE-2019-9169 json

In the GNU C Library (aka glibc or libc6) through 2.29, proceed_next_node in posix/regexec.c has a heap-based buffer over-read via an attem…

published 2019-02-26 7 y ago modified 2026-10-14 25 d ago also EUVD-2019-18547

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.7%
EPSS 4.7% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

In the GNU C Library (aka glibc or libc6) through 2.29, proceed_next_node in posix/regexec.c has a heap-based buffer over-read via an attempted case-insensitive regular-expression match.

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 2.28-9

debian advisories DEBIAN-CVE-2019-9169

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

ubuntu advisories UBUNTU-CVE-2019-9169

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 8 2.28-151.el8
  • nscd RHEL 8 2.28-151.el8
  • libnsl RHEL 8 2.28-151.el8
  • nss_db RHEL 8 2.28-151.el8
  • nss_hesiod RHEL 8 2.28-151.el8
  • glibc-utils RHEL 8 2.28-151.el8
  • glibc-common RHEL 8 2.28-151.el8
  • glibc-benchtests RHEL 8 2.28-151.el8

red hat advisories RHSA-2021:1585

  • glibc SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 2.11.3-17.110.33.1
  • glibc SLES 12 SP3-BCL, SLES 12 SP2-BCL, OpenStack Cloud Crowbar 8 +9 more 2.22-62.22.5
  • glibc SLE Module for Development Tools 15 SP1, SLE Module for Development Tools 15, SLE Module for Basesystem 15 SP1 +1 more 2.26-13.24.1
  • glibc SLES for SAP 12 SP4, SLES 12 SP4, SLED 12 SP4 +1 more 2.22-100.8.1

suse advisories SUSE-SU-2019:14084-1SUSE-SU-2019:1958-1SUSE-SU-2019:1958-2SUSE-SU-2019:1877-1SUSE-SU-2019:1102-1

  • glibc openSUSE Tumbleweed 2.34-1.2

opensuse advisories openSUSE-SU-2024:10792-1

  • nss_hesiod AlmaLinux 8 2.28-151.el8
  • glibc-benchtests AlmaLinux 8 2.28-151.el8

almalinux advisories ALSA-2021:1585

  • glibc Rocky Linux 8 2.28-151.el8

rocky linux advisories RLSA-2021:1585

  • glibc Arch Linux 2.30-1

arch linux advisories AVG-855

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-2019-9169 updated cvss 6.5

glibc: regular-expression match via proceed_next_node in posix/regexec.c leads to heap-based buffer over-read

  • Red Hat Enterprise Linux 5 glibc Red Hat Enterprise Linux 6 nscd, glibc, glibc-utils, glibc-common Red Hat Enterprise Linux 7 nscd, glibc, glibc-utils, glibc-common
    affected: no fix planned “Will not fix”
  • Red Hat CodeReady Linux Builder (v. 8) nss_hesiod 2.28-151.el8, glibc-benchtests 2.28-151.el8, glibc-debuginfo-common 2.28-151.el8 Red Hat Enterprise Linux AppStream (v. 8) glibc-utils 2.28-151.el8, glibc-debuginfo-common 2.28-151.el8, compat-libpthread-nonshared 2.28-151.el8 Red Hat Enterprise Linux BaseOS (v. 8) nscd 2.28-151.el8, glibc 2.28-151.el8, libnsl 2.28-151.el8, nss_db 2.28-151.el8, glibc-common 2.28-151.el8, glibc-all-langpacks 2.28-151.el8, +3 more
    fixed: vendor fix RHSA-2021:1585

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 9.8

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

4.73% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • debbugs.gnu.org https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34142 referenced PoC, tagged "exploit" by a source, unverified
  • debbugs.gnu.org https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34140 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

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 Vulns 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.