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Fencer Vulns
low 2.1

CVE-2026-6368 json

wordexp with WRDE_APPEND can return or use invalid memory

published 2026-08-10 2 mo ago modified 2026-09-03 2 mo ago also EUVD-2026-55727

cvss
2.1
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits
0
none known

Summary

Calling wordexp with WRDE_APPEND in the GNU C Library version 2.0 to version 2.43 can cause the interface to return invalid memory in the we_wordv member, which on subsequent calls to wordfree may abort the process.

Patch / fix

  • glibc glibc 2.43
  • glibc Debian 14 2.43-4

debian advisories DEBIAN-CVE-2026-6368

  • glibc Ubuntu 22.04 LTS 2.35-0ubuntu3.15
  • glibc Ubuntu 24.04 LTS 2.39-0ubuntu8.9
  • glibc Ubuntu 26.04 LTS 2.43-2ubuntu2.4

ubuntu advisories UBUNTU-CVE-2026-6368

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 9 2.34-283.el9_8
  • nscd RHEL 9 2.34-283.el9_8
  • libnsl RHEL 9 2.34-283.el9_8
  • nss_db RHEL 9 2.34-283.el9_8
  • nss_hesiod RHEL 9 2.34-283.el9_8
  • glibc-utils RHEL 9 2.34-283.el9_8
  • glibc-common RHEL 9 2.34-283.el9_8
  • glibc-benchtests RHEL 9 2.34-283.el9_8

red hat advisories RHSA-2026:79281RHSA-2026:76781RHSA-2026:76777RHSA-2026:53069

  • glibc SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +8 more 2.31-150300.109.1
  • glibc SLES 16.0, Linux Micro Extras 6.2, Linux Micro 6.2 +1 more 2.40-160000.7.1
  • glibc SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Development Tools 15 SP7 +1 more 2.38-150600.14.58.1
  • glibc Linux Micro 6.1 2.38-slfo.1.1_10.1
  • glibc Linux Micro 6.0 2.38-15.1
  • glibc SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 2.22-114.52.2

suse advisories SUSE-SU-2026:4591-1SUSE-SU-2026:23934-1SUSE-SU-2026:23957-1SUSE-SU-2026:23929-1SUSE-SU-2026:4250-1SUSE-SU-2026:4204-1

  • glibc openSUSE Leap 16.0 2.40-160000.7.1
  • glibc-cross-s390x-src openSUSE Leap 16.0 2.40-160000.7.1
  • glibc-cross-aarch64-src openSUSE Leap 16.0 2.40-160000.7.1
  • glibc-cross-ppc64le-src openSUSE Leap 16.0 2.40-160000.7.1
  • glibc-cross-riscv64-src openSUSE Leap 16.0 2.40-160000.7.1
  • glibc openSUSE Tumbleweed 2.44-1.1

opensuse advisories openSUSE-SU-2026:21968-1openSUSE-SU-2026:11660-1

  • glibc AlmaLinux 9 2.34-283.el9_8
  • nscd AlmaLinux 9 2.34-283.el9_8
  • libnsl AlmaLinux 9 2.34-283.el9_8
  • nss_db AlmaLinux 9 2.34-283.el9_8
  • nss_hesiod AlmaLinux 9 2.34-283.el9_8
  • glibc-utils AlmaLinux 9 2.34-283.el9_8
  • glibc-common AlmaLinux 9 2.34-283.el9_8
  • glibc-benchtests AlmaLinux 9 2.34-283.el9_8

almalinux advisories ALSA-2026:79281ALSA-2026:76777ALSA-2026:76781

  • glibc Rocky Linux 10 2.39-142.el10_2
  • glibc Rocky Linux 9 2.34-283.el9_8
  • glibc Rocky Linux 8 2.28-251.el8_10.43

rocky linux advisories RLSA-2026:76781RLSA-2026:79281RLSA-2026:76777

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-2026-6368 updated cvss 5.5

glibc: glibc: Process abort due to invalid memory in wordexp

  • Red Hat Enterprise Linux 6 nscd, glibc, glibc-utils, glibc-common, compat-glibc 2.5-46.2
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 nscd, glibc, glibc-utils, compat-glibc, glibc-common, compat-glibc 2.5-46.2 Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: no fix available “Fix deferred”
  • Red Hat Cost Management 4 costmanagement/costmanagement-metrics-rhel9-operator 1793202662
    fixed: vendor fix RHSA-2026:95264
  • Red Hat Enterprise Linux AppStream (v. 8) glibc-utils 2.28-251.el8_10.43, compat-libpthread-nonshared 2.28-251.el8_10.43
    fixed: vendor fix RHSA-2026:76777
  • Red Hat Enterprise Linux AppStream (v. 9) glibc-utils 2.34-283.el9_8, glibc-locale-source 2.34-283.el9_8
    fixed: vendor fix RHSA-2026:79281
  • Red Hat Enterprise Linux AppStream (v. 10) glibc-utils 2.39-142.el10_2, glibc-locale-source 2.39-142.el10_2
    fixed: vendor fix RHSA-2026:76781
  • Red Hat Enterprise Linux BaseOS (v. 8) nscd 2.28-251.el8_10.43, glibc 2.28-251.el8_10.43, libnsl 2.28-251.el8_10.43, nss_db 2.28-251.el8_10.43, glibc-common 2.28-251.el8_10.43, glibc-gconv-extra 2.28-251.el8_10.43, +3 more
    fixed: vendor fix RHSA-2026:76777
  • Red Hat Enterprise Linux BaseOS (v. 9) nscd 2.34-283.el9_8, glibc 2.34-283.el9_8, libnsl 2.34-283.el9_8, glibc-common 2.34-283.el9_8, glibc-gconv-extra 2.34-283.el9_8, glibc-all-langpacks 2.34-283.el9_8, +1 more
    fixed: vendor fix RHSA-2026:79281
show 7 more
  • Red Hat Enterprise Linux BaseOS (v. 10) glibc 2.39-142.el10_2, libnsl 2.39-142.el10_2, glibc-common 2.39-142.el10_2, glibc-gconv-extra 2.39-142.el10_2, glibc-all-langpacks 2.39-142.el10_2, glibc-minimal-langpack 2.39-142.el10_2
    fixed: vendor fix RHSA-2026:76781
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) nss_db 2.34-283.el9_8, nss_hesiod 2.34-283.el9_8, glibc-benchtests 2.34-283.el9_8
    fixed: vendor fix RHSA-2026:79281
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) nss_db 2.39-142.el10_2, nss_hesiod 2.39-142.el10_2, glibc-benchtests 2.39-142.el10_2
    fixed: vendor fix RHSA-2026:76781
  • Red Hat Enterprise Linux CRB (v. 8) nss_hesiod 2.28-251.el8_10.43, glibc-benchtests 2.28-251.el8_10.43
    fixed: vendor fix RHSA-2026:76777
  • Red Hat Hardened Images glibc 2.43-8.1.hum1, libnsl 2.43-8.1.hum1, nss_db 2.43-8.1.hum1, glibc32 2.43-8.1.hum1, nss_hesiod 2.43-8.1.hum1, glibc-utils 2.43-8.1.hum1, +9 more
    fixed: vendor fix RHSA-2026:53069
  • Red Hat Update Infrastructure 5 rhui5/cds-rhel9 1791978528, rhui5/rhua-rhel9 1791978693, rhui5/haproxy-rhel9 1791978528, rhui5/installer-rhel9 1791964013, rhui5/cds-kubernetes-rhel9 1791978534
    fixed: vendor fix RHSA-2026:82939
  • Red Hat Cost Management 4 costmanagement/costmanagement-metrics-operator-bundle 1793205914 Red Hat Hardened Images filesystem 3.18-59.hum1 Red Hat OpenShift AI (RHOAI) rhoai/odh-kserve-controller-rhel9, rhoai/odh-model-serving-api-rhel9, rhoai/odh-workbenches-operator-rhel9, rhoai/odh-llama-stack-k8s-operator-rhel9, rhoai/odh-kserve-llmisvc-controller-rhel9
    not affected: vulnerable code not present

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 SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.11% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 2.1 CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/S:P/AU:Y/U:Green
CNA 4.0 2.1 CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:X/V:X/RE:X/U:Green

Affected products

  • glibc glibc

Classification

Weakness
  • CWE-908 Use of Uninitialized Resource

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.