CVE record · CVE-2023-40549

Shim: out-of-bounds read in verify_buffer_authenticode() malformed pe file

CVSS 6.2 MediumEPSS 0.0041 · 35th percentile

Published by the CVE Program (CNA: redhat) at 29 Jan 2024, 16:29 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Red Hat	Red Hat Enterprise Linux 7 Package name: shim https://access.redhat.com/downloads/content/package-browser/	unaffected 0:15.8-3.el7 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 7 Package name: shim-signed https://access.redhat.com/downloads/content/package-browser/	unaffected 0:15.8-1.el7 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8 Package name: shim https://access.redhat.com/downloads/content/package-browser/	unaffected 0:15.8-4.el8_9 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.2 Advanced Update Support Package name: shim https://access.redhat.com/downloads/content/package-browser/	unaffected 0:15.8-2.el8_2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.2 Telecommunications Update Service Package name: shim https://access.redhat.com/downloads/content/package-browser/	unaffected 0:15.8-2.el8_2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions Package name: shim https://access.redhat.com/downloads/content/package-browser/	unaffected 0:15.8-2.el8_2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Package name: shim https://access.redhat.com/downloads/content/package-browser/	unaffected 0:15.8-2.el8_4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Telecommunications Update Service Package name: shim https://access.redhat.com/downloads/content/package-browser/	unaffected 0:15.8-2.el8_4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions Package name: shim https://access.redhat.com/downloads/content/package-browser/	unaffected 0:15.8-2.el8_4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Package name: shim https://access.redhat.com/downloads/content/package-browser/	unaffected 0:15.8-2.el8_6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Extended Update Support Package name: shim https://access.redhat.com/downloads/content/package-browser/	unaffected 0:15.8-2.el8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Extended Update Support Package name: shim-unsigned-x64 https://access.redhat.com/downloads/content/package-browser/	unaffected 0:15.8-2.el8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9 Package name: shim https://access.redhat.com/downloads/content/package-browser/	unaffected 0:15.8-4.el9_3 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.0 Extended Update Support Package name: shim https://access.redhat.com/downloads/content/package-browser/	unaffected 0:15.8-3.el9 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.0 Extended Update Support Package name: shim-unsigned-aarch64 https://access.redhat.com/downloads/content/package-browser/	unaffected 0:15.8-2.el9 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.0 Extended Update Support Package name: shim-unsigned-x64 https://access.redhat.com/downloads/content/package-browser/	unaffected 0:15.8-2.el9 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.2 Extended Update Support Package name: shim https://access.redhat.com/downloads/content/package-browser/	unaffected 0:15.8-3.el9_2 to before * rpm Other versions: affected

Identifiers: CVE-2023-40549
CNA: redhat
Weakness (CWE): CWE-125
Tags: Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 8.2 Advanced Update Support
Red Hat Enterprise Linux 8.2 Telecommunications Update Service
Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Red Hat Enterprise Linux 8.4 Telecommunications Update Service
Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
Memory corruption
Published: 29 Jan 2024
Updated: 20 Nov 2025

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.2	Medium	3.1	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CNA (redhat)

CISA KEV Not listed.
EPSS 0.0041, the 35th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 29 Jan 2024. New records show when each source confirmed them.

Sources

References from the CNA

access.redhat.com/errata/RHSA-2024:1834 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2024:1835 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2024:1873 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2024:1876 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2024:1883 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2024:1902 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2024:1903 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2024:1959 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2024:2086 vendor-advisoryredhat
access.redhat.com/security/cve/CVE-2023-40549 vdb-entryredhat
bugzilla.redhat.com/show_bug.cgi?id=2241797 issue-trackingredhat

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.