CVE-2022-40674

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.77% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 76.4% of scored records. A rank, not a probability.

NVD base score

8.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2022-09-14 00:00Z3 YR AGO

Last updated

2025-05-30 19:18Z1 YR AGO

Reserved

2022-09-14

Assigning CNA

mitre

Record state

PUBLISHED

Severity

High (CVSS 8.1)

CNA CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

• CWE-416Use After FreeVariant

Data version

5.1

Document digest

69fbc26e9b8c1bf2ba5ba504a81fedd5fa009fab3a7d9ec1d65d3e8c7ca07ad1

• github.comhttps://github.com/libexpat/libexpat/pull/629
• github.comhttps://github.com/libexpat/libexpat/pull/640
• www.debian.orgDSA-5236https://www.debian.org/security/2022/dsa-5236vendor-advisory
• lists.debian.org[debian-lts-announce] 20220925 [SECURITY] [DLA 3119-1] expat security updatehttps://lists.debian.org/debian-lts-announce/2022/09/msg00029.htmlmailing-list
• security.gentoo.orgGLSA-202209-24https://security.gentoo.org/glsa/202209-24vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-15ec504440https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WE2ZKEPGFCZ7R6DRVH3K6RBJPT42ZBEG/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-c68d90efc3https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J2IGJNHFV53PYST7VQV3T4NHVYAMXA36/vendor-advisory
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20221028-0008/
• lists.fedoraproject.orgFEDORA-2022-d93b3bd8b9https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GSVZN3IJ6OCPSJL7AEX3ZHSHAHFOGESK/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-c22feb71bahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGBVQQ47URGJAZWHCISHDWF6QBTV2LE/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-dcb1d7bcb1https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LQB6FJAM5YQ35SF5B2MN25Y2FX56EOEZ/vendor-advisory
• security.gentoo.orgGLSA-202211-06https://security.gentoo.org/glsa/202211-06vendor-advisory