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TI-2022-08946 Aliases CVE-2022-25235GHSA-8mw4-grgw-m3fp

xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding…

Priority MEDIUM 57CWE-116Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 25 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks for whether a UTF-8 character is valid in a certain context.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.04955 92nd percentileScored 2026-11-07
Fix Partial Red Hat: 24 advisoriesRed Hat: 25 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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 · 9

CPEVersionsRoleVendor
cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*before 2.4.5Vulnerablelibexpat 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:34:*:*:*:*:*:*:*34VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*35VulnerableFedoraproject
cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:*12.2.1.3.0VulnerableOracle
cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:*12.2.1.4.0VulnerableOracle
cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*8.8VulnerableOracle
cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:*before 3.1VulnerableSiemens
  • cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:* Versions before 2.4.5 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:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
  • cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:* Versions 12.2.1.3.0 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:* Versions 12.2.1.4.0 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:* Versions 8.8 Vulnerable ·Oracle
  • cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:* Versions before 3.1 Vulnerable ·Siemens

Remediation

Red Hat 24 advisories

  • RHSA-2022:7811 Released 2022-11-08 · Red Hat rating Important
    mingw-expat security update
    • Red Hat CodeReady Linux Builder (v. 8) mingw-expat-2.4.8-1.el8, mingw32-expat-2.4.8-1.el8, mingw64-expat-2.4.8-1.el8
  • RHSA-2022:7144 Released 2022-10-26 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.51 security update
    • Red Hat JBoss Core Services
  • RHSA-2022:1643 Released 2022-04-28 · Red Hat rating Important
    xmlrpc-c security update
    • Red Hat CodeReady Linux Builder (v. 8) xmlrpc-c-c++-1.51.0-5.el8_5.1, xmlrpc-c-client++-1.51.0-5.el8_5.1, xmlrpc-c-devel-1.51.0-5.el8_5.1
    • Red Hat Enterprise Linux BaseOS (v. 8) xmlrpc-c-1.51.0-5.el8_5.1, xmlrpc-c-client-1.51.0-5.el8_5.1
Show 21 more Red Hat advisories
  • RHSA-2022:1644 Released 2022-04-28 · Red Hat rating Important
    xmlrpc-c security update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.4) xmlrpc-c-1.51.0-5.el8_4.1, xmlrpc-c-client-1.51.0-5.el8_4.1
    • Red Hat Enterprise Linux CRB EUS (v.8.4) xmlrpc-c-c++-1.51.0-5.el8_4.1, xmlrpc-c-client++-1.51.0-5.el8_4.1, xmlrpc-c-devel-1.51.0-5.el8_4.1
  • RHSA-2022:1540 Released 2022-04-26 · Red Hat rating Important
    xmlrpc-c security update
    • Red Hat CodeReady Linux Builder EUS (v. 8.2) xmlrpc-c-c++-1.51.0-5.el8_2.1, xmlrpc-c-client++-1.51.0-5.el8_2.1, xmlrpc-c-devel-1.51.0-5.el8_2.1
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) xmlrpc-c-1.51.0-5.el8_2.1, xmlrpc-c-client-1.51.0-5.el8_2.1
  • RHSA-2022:1539 Released 2022-04-26 · Red Hat rating Important
    xmlrpc-c security update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.1) xmlrpc-c-1.51.0-5.el8_1.1, xmlrpc-c-client-1.51.0-5.el8_1.1
  • RHSA-2022:1309 Released 2022-04-12 · Red Hat rating Important
    expat security update
    • Red Hat Enterprise Linux Server (v. 6 ELS) expat-2.0.1-14.el6_10, expat-devel-2.0.1-14.el6_10
  • RHSA-2022:1263 Released 2022-04-07 · Red Hat rating Important
    RHV-H security update (redhat-virtualization-host) 4.3.22
    • RHEL 7-based RHEV-H for RHEV 4 (build requirements) redhat-virtualization-host-4.3.22-20220330.1.el7_9, redhat-virtualization-host-image-update-4.3.22-20220330.1.el7_9
    • Red Hat Virtualization 4 Hypervisor for RHEL 7 redhat-virtualization-host-4.3.22-20220330.1.el7_9, redhat-virtualization-host-image-update-4.3.22-20220330.1.el7_9
  • RHSA-2022:1069 Released 2022-03-28 · Red Hat rating Important
    expat security update
    • Red Hat Enterprise Linux Client (v. 7) expat-2.1.0-14.el7_9
    • Red Hat Enterprise Linux Client Optional (v. 7) expat-devel-2.1.0-14.el7_9, expat-static-2.1.0-14.el7_9
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) expat-devel-2.1.0-14.el7_9, expat-static-2.1.0-14.el7_9
    • Red Hat Enterprise Linux Server (v. 7) expat-2.1.0-14.el7_9, expat-2.1.0-14.el7_9.ppc, expat-devel-2.1.0-14.el7_9 +1
    • Red Hat Enterprise Linux Server Optional (v. 7) expat-static-2.1.0-14.el7_9, expat-static-2.1.0-14.el7_9.ppc
    • Red Hat Enterprise Linux Workstation (v. 7) expat-2.1.0-14.el7_9, expat-devel-2.1.0-14.el7_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) expat-static-2.1.0-14.el7_9
  • RHSA-2022:1070 Released 2022-03-28 · Red Hat rating Important
    expat security update
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) expat-2.2.5-3.el8_2.2, expat-devel-2.2.5-3.el8_2.2
  • RHSA-2022:1068 Released 2022-03-28 · Red Hat rating Important
    expat security update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.1) expat-2.2.5-3.el8_1.1, expat-devel-2.2.5-3.el8_1.1
  • RHSA-2022:1053 Released 2022-03-24 · Red Hat rating Important
    Red Hat Virtualization Host security and enhancement update [ovirt-4.4.10] Async #2
    • Red Hat Virtualization 4 Hypervisor for RHEL 8 redhat-virtualization-host-4.4.10-202203211649_8.5, redhat-virtualization-host-image-update-4.4.10-202203211649_8.5
  • RHSA-2022:1012 Released 2022-03-22 · Red Hat rating Important
    expat security update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.4) expat-2.2.5-4.el8_4.2, expat-devel-2.2.5-4.el8_4.2
  • RHSA-2022:0951 Released 2022-03-16 · Red Hat rating Important
    expat security update
    • Red Hat Enterprise Linux BaseOS (v. 8) expat-2.2.5-4.el8_5.3, expat-devel-2.2.5-4.el8_5.3
  • RHSA-2022:0850 Released 2022-03-14 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-91.7.0-2.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-91.7.0-2.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-91.7.0-2.el7_9
  • RHSA-2022:0853 Released 2022-03-14 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) thunderbird-91.7.0-2.el8_4
  • RHSA-2022:0845 Released 2022-03-14 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-91.7.0-2.el8_5
  • RHSA-2022:0847 Released 2022-03-14 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) thunderbird-91.7.0-2.el8_1
  • RHSA-2022:0843 Released 2022-03-14 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) thunderbird-91.7.0-2.el8_2
  • RHSA-2022:0824 Released 2022-03-10 · Red Hat rating Critical
    firefox security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) firefox-91.7.0-3.el7_9
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-91.7.0-3.el7_9
    • Red Hat Enterprise Linux Server (v. 7) firefox-91.7.0-3.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-91.7.0-3.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-91.7.0-3.el7_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-91.7.0-3.el7_9
  • RHSA-2022:0817 Released 2022-03-10 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) firefox-91.7.0-3.el8_4
  • RHSA-2022:0818 Released 2022-03-10 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-91.7.0-3.el8_5
  • RHSA-2022:0816 Released 2022-03-10 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) firefox-91.7.0-3.el8_2
  • RHSA-2022:0815 Released 2022-03-10 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox-91.7.0-3.el8_1

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 8AffectedNo fix yet
RHEL 7-based RHEV-H for RHEV 4 (build requirements)Fixed RHSA-2022:1263
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2022:1643, RHSA-2022:7811
Red Hat CodeReady Linux Builder EUS (v. 8.2)Fixed RHSA-2022:1540
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2022:0818, RHSA-2022:0845
Red Hat Enterprise Linux AppStream (v. 9)Fixed—
Red Hat Enterprise Linux AppStream E4S (v. 8.1)Fixed RHSA-2022:0815, RHSA-2022:0847
Red Hat Enterprise Linux AppStream EUS (v. 8.2)Fixed RHSA-2022:0816, RHSA-2022:0843
Red Hat Enterprise Linux AppStream EUS (v.8.4)Fixed RHSA-2022:0817, RHSA-2022:0853
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2022:0951, RHSA-2022:1643
Red Hat Enterprise Linux BaseOS (v. 9)Fixed—
Red Hat Enterprise Linux BaseOS E4S (v. 8.1)Fixed RHSA-2022:1068, RHSA-2022:1539
Red Hat Enterprise Linux BaseOS EUS (v. 8.2)Fixed RHSA-2022:1070, RHSA-2022:1540
Red Hat Enterprise Linux BaseOS EUS (v.8.4)Fixed RHSA-2022:1012, RHSA-2022:1644
Red Hat Enterprise Linux CRB EUS (v.8.4)Fixed RHSA-2022:1644
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2022:0824, RHSA-2022:0850, RHSA-2022:1069
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2022:0824, RHSA-2022:1069
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2022:1069
Red Hat Enterprise Linux Server (v. 6 ELS)Fixed RHSA-2022:1309
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2022:0824, RHSA-2022:1069
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2022:0824, RHSA-2022:0850, RHSA-2022:1069
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2022:0824, RHSA-2022:0850, RHSA-2022:1069
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2022:0824, RHSA-2022:1069
Red Hat JBoss Core ServicesFixed RHSA-2022:7144
Red Hat Virtualization 4 Hypervisor for RHEL 7Fixed RHSA-2022:1263
Red Hat Virtualization 4 Hypervisor for RHEL 8Fixed RHSA-2022:1053
Not affected: 4 products
  • RHEL 7-based RHEV-H for RHEV 4 (build requirements)
  • RHEL 8-based RHEV-H for RHEV 4 (build requirements)
  • Red Hat Enterprise Linux 9
  • Red Hat Virtualization 4 Hypervisor for RHEL 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-25235
  2. 2026-10-03 Alias added: GHSA-8mw4-grgw-m3fp
  3. 2026-10-09 Fix available: RHSA-2022:7144 · Red Hat
  4. 2026-10-09 Fix available: Red Hat JBoss Core Services · Red Hat

References

Patch 2

Advisory 8

Sources

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