CVE-2023-40548

7.4 HIGH
Published: January 29, 2024 Modified: June 26, 2026
View on NVD

Description

A buffer overflow was found in Shim in the 32-bit system. The overflow happens due to an addition operation involving a user-controlled value parsed from the PE binary being used by Shim. This value is further used for memory allocation operations, leading to a heap-based buffer overflow. This flaw causes memory corruption and can lead to a crash or data integrity issues during the boot phase.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-40548
Source: secalert@redhat.com
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2241782
Source: secalert@redhat.com
Issue Tracking Vendor Advisory
https://access.redhat.com/errata/RHSA-2024:1834
Source: af854a3a-2127-422b-91ae-364da2661108
https://access.redhat.com/errata/RHSA-2024:1835
Source: af854a3a-2127-422b-91ae-364da2661108
https://access.redhat.com/errata/RHSA-2024:1873
Source: af854a3a-2127-422b-91ae-364da2661108
https://access.redhat.com/errata/RHSA-2024:1876
Source: af854a3a-2127-422b-91ae-364da2661108
https://access.redhat.com/errata/RHSA-2024:1883
Source: af854a3a-2127-422b-91ae-364da2661108
https://access.redhat.com/errata/RHSA-2024:1902
Source: af854a3a-2127-422b-91ae-364da2661108
https://access.redhat.com/errata/RHSA-2024:1903
Source: af854a3a-2127-422b-91ae-364da2661108
https://access.redhat.com/errata/RHSA-2024:1959
Source: af854a3a-2127-422b-91ae-364da2661108
https://access.redhat.com/errata/RHSA-2024:2086
Source: af854a3a-2127-422b-91ae-364da2661108
https://access.redhat.com/security/cve/CVE-2023-40548
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2241782
Source: af854a3a-2127-422b-91ae-364da2661108
Issue Tracking Vendor Advisory

23 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.4 / 10.0
EPSS (Exploit Probability)
0.4%
35th percentile
Exploitation Status
Not in CISA KEV

Affected Vendors

fedoraproject redhat