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TI-2022-19311 Aliases CVE-2022-40674GHSA-2vq2-xc55-3j5m

libexpat before 2.4.9 has a use-after-free in the doContent function in xmlparse.c.

Priority MEDIUM 42CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 21 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

libexpat before 2.4.9 has a use-after-free in the doContent function in xmlparse.c.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0225 83rd percentileScored 2026-11-07
Fix Partial Red Hat: 23 advisoriesRed Hat: 21 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*before 2.4.9Vulnerablelibexpat project
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*35VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*36VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*37VulnerableFedoraproject
  • cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:* Versions before 2.4.9 Vulnerable ·libexpat project
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian
  • cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* Versions 36 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* Versions 37 Vulnerable ·Fedoraproject

Remediation

Red Hat 23 advisories

  • RHSA-2023:3068 Released 2023-05-16 · Red Hat rating Important
    mingw-expat security update
    • Red Hat Enterprise Linux CRB (v. 8) mingw-expat-2.4.8-2.el8, mingw32-expat-2.4.8-2.el8, mingw64-expat-2.4.8-2.el8
  • RHSA-2022:8841 Released 2022-12-08 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.51 SP1 security update
    • Red Hat JBoss Core Services
  • RHSA-2022:8598 Released 2022-11-22 · Red Hat rating Important
    Red Hat Virtualization Host security update [ovirt-4.5.3-1]
    • Red Hat Virtualization 4 Hypervisor for RHEL 8 redhat-virtualization-host-4.5.3-202211170828_8.6, redhat-virtualization-host-image-update-4.5.3-202211170828_8.6
Show 20 more Red Hat advisories
  • RHSA-2022:7025 Released 2022-10-18 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) firefox-102.3.0-7.el8_4
  • RHSA-2022:7024 Released 2022-10-18 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-102.3.0-7.el8_6
  • RHSA-2022:7023 Released 2022-10-18 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-102.3.0-4.el8_6
  • RHSA-2022:7020 Released 2022-10-18 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 9) firefox-102.3.0-7.el9_0
  • RHSA-2022:7026 Released 2022-10-18 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-102.3.0-4.el9_0
  • RHSA-2022:7022 Released 2022-10-18 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) firefox-102.3.0-7.el8_2
  • RHSA-2022:7019 Released 2022-10-18 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox-102.3.0-7.el8_1
  • RHSA-2022:7021 Released 2022-10-18 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) thunderbird-102.3.0-4.el8_1
  • RHSA-2022:6998 Released 2022-10-18 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-102.3.0-4.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-102.3.0-4.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-102.3.0-4.el7_9
  • RHSA-2022:6995 Released 2022-10-18 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) thunderbird-102.3.0-4.el8_4
  • RHSA-2022:6997 Released 2022-10-18 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux Client (v. 7) firefox-102.3.0-7.el7_9
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-102.3.0-7.el7_9
    • Red Hat Enterprise Linux Server (v. 7) firefox-102.3.0-7.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-102.3.0-7.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-102.3.0-7.el7_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-102.3.0-7.el7_9
  • RHSA-2022:6996 Released 2022-10-18 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) thunderbird-102.3.0-4.el8_2
  • RHSA-2022:6967 Released 2022-10-17 · Red Hat rating Important
    compat-expat1 security update
    • Red Hat Enterprise Linux Server (v. 6 ELS) compat-expat1-1.95.8-9.el6_10
  • RHSA-2022:6921 Released 2022-10-12 · Red Hat rating Important
    expat security update
    • Red Hat Enterprise Linux Server (v. 6 ELS) expat-2.0.1-15.el6_10, expat-devel-2.0.1-15.el6_10
  • RHSA-2022:6878 Released 2022-10-11 · Red Hat rating Important
    expat security update
    • Red Hat Enterprise Linux BaseOS (v. 8) expat-2.2.5-8.el8_6.3, expat-devel-2.2.5-8.el8_6.3
  • RHSA-2022:6838 Released 2022-10-06 · Red Hat rating Important
    expat security update
    • Red Hat Enterprise Linux AppStream (v. 9) expat-devel-2.2.10-12.el9_0.3
    • Red Hat Enterprise Linux BaseOS (v. 9) expat-2.2.10-12.el9_0.3
  • RHSA-2022:6834 Released 2022-10-06 · Red Hat rating Important
    expat security update
    • Red Hat Enterprise Linux Client (v. 7) expat-2.1.0-15.el7_9
    • Red Hat Enterprise Linux Client Optional (v. 7) expat-devel-2.1.0-15.el7_9, expat-static-2.1.0-15.el7_9
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) expat-devel-2.1.0-15.el7_9, expat-static-2.1.0-15.el7_9
    • Red Hat Enterprise Linux Server (v. 7) expat-2.1.0-15.el7_9, expat-2.1.0-15.el7_9.ppc, expat-devel-2.1.0-15.el7_9 +1
    • Red Hat Enterprise Linux Server Optional (v. 7) expat-static-2.1.0-15.el7_9, expat-static-2.1.0-15.el7_9.ppc
    • Red Hat Enterprise Linux Workstation (v. 7) expat-2.1.0-15.el7_9, expat-devel-2.1.0-15.el7_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) expat-static-2.1.0-15.el7_9
  • RHSA-2022:6831 Released 2022-10-06 · Red Hat rating Important
    expat security update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.4) expat-2.2.5-4.el8_4.4, expat-devel-2.2.5-4.el8_4.4
  • RHSA-2022:6832 Released 2022-10-06 · Red Hat rating Important
    expat security update
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) expat-2.2.5-3.el8_2.3, expat-devel-2.2.5-3.el8_2.3
  • RHSA-2022:6833 Released 2022-10-06 · Red Hat rating Important
    expat security update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.1) expat-2.2.5-3.el8_1.2, expat-devel-2.2.5-3.el8_1.2

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 8AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2022:7023, RHSA-2022:7024
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2022:6838, RHSA-2022:7020, RHSA-2022:7026
Red Hat Enterprise Linux AppStream E4S (v. 8.1)Fixed RHSA-2022:7019, RHSA-2022:7021
Red Hat Enterprise Linux AppStream EUS (v. 8.2)Fixed RHSA-2022:6996, RHSA-2022:7022
Red Hat Enterprise Linux AppStream EUS (v.8.4)Fixed RHSA-2022:6995, RHSA-2022:7025
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2022:6878
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2022:6838
Red Hat Enterprise Linux BaseOS E4S (v. 8.1)Fixed RHSA-2022:6833
Red Hat Enterprise Linux BaseOS EUS (v. 8.2)Fixed RHSA-2022:6832
Red Hat Enterprise Linux BaseOS EUS (v.8.4)Fixed RHSA-2022:6831
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2023:3068
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2022:6834, RHSA-2022:6997, RHSA-2022:6998
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2022:6834, RHSA-2022:6997
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2022:6834
Red Hat Enterprise Linux Server (v. 6 ELS)Fixed RHSA-2022:6921, RHSA-2022:6967
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2022:6834, RHSA-2022:6997
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2022:6834, RHSA-2022:6997, RHSA-2022:6998
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2022:6834, RHSA-2022:6997, RHSA-2022:6998
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2022:6834, RHSA-2022:6997
Red Hat JBoss Core ServicesFixed RHSA-2022:8841
Red Hat Virtualization 4 Hypervisor for RHEL 8Fixed RHSA-2022:8598
Not affected: 2 products
  • RHEL 8-based RHEV-H for RHEV 4 (build requirements)
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-40674
  2. 2026-10-03 Alias added: GHSA-2vq2-xc55-3j5m
  3. 2026-10-09 Fix available: RHSA-2022:8841 · Red Hat
  4. 2026-10-09 Fix available: Red Hat JBoss Core Services · Red Hat

References

Patch 2

Advisory 10

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences