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CVE-2022-40674

HIGH
8.1
CVSS Score
Published: September 14, 2022 at 12:00 AM UTC
Updated: October 14, 2026 at 06:17 PM UTC
3 products affected across 3 vendorsDebian LinuxFedoraLibexpat

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Severity
HIGH8.1
Exploit prediction
EPSS 2%
SSVC
No known exploit

Description

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
10.011.0
Fedora· Fedora Projectrpm
95%
353637
Libexpat· Libexpat Project
95%
v < 2.4.9
Affected range stops below 2.4.9, so it looks safe — our inference, not a vendor statement

References (15)

Issue TrackingPatchThird Party Advisory
Source: [email protected]
https://github.com/libexpat/libexpat/pull/629
Issue TrackingPatchThird Party Advisory
Source: [email protected]
https://github.com/libexpat/libexpat/pull/640
Mailing ListIssue TrackingThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2022/09/msg00029.html
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GSVZN3IJ6OCPSJL7AEX3ZHSHAHFOGESK/
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J2IGJNHFV53PYST7VQV3T4NHVYAMXA36/
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LQB6FJAM5YQ35SF5B2MN25Y2FX56EOEZ/
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WE2ZKEPGFCZ7R6DRVH3K6RBJPT42ZBEG/
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGBVQQ47URGJAZWHCISHDWF6QBTV2LE/

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.1HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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