Medium severity · published Jan 29, 2024
CVE-2023-40551
A flaw was found in the MZ binary format in Shim
5.1
CVSS
0.4%
EPSS
No
On KEV
Description
A flaw was found in the MZ binary format in Shim. An out-of-bounds read may occur, leading to a crash or possible exposure of sensitive data during the system's boot phase.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
Low
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
Enterprise Linux · Redhat
8.0; 9.0 · source: NVD
FE
Fedora · Fedoraproject
39 · source: NVD
SH
Shim · Redhat
before 15.8 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-40551
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-40551
access.redhat.com
https://access.redhat.com/errata/RHSA-2024:1834
access.redhat.com
https://access.redhat.com/errata/RHSA-2024:1835
access.redhat.com
https://access.redhat.com/errata/RHSA-2024:1873
access.redhat.com
https://access.redhat.com/errata/RHSA-2024:1876
access.redhat.com
https://access.redhat.com/errata/RHSA-2024:1883
access.redhat.com
https://access.redhat.com/errata/RHSA-2024:1902
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