CVE-2023-40550
Shim: out-of-bound read in verify_buffer_sbat()
CVSS Score
5.5
EPSS Score
0.0%
EPSS Percentile
0th
An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information. This issue may expose sensitive data during the system's boot phase.
| CWE | CWE-125 |
| Vendor | red hat |
| Product | red hat enterprise linux 7 |
| Published | Jan 29, 2024 |
| Last Updated | Jan 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 8.2 Advanced Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 8.2 Telecommunications Update Service
All versions affected Red Hat / Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions
All versions affected Red Hat / Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 8.4 Telecommunications Update Service
All versions affected Red Hat / Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
All versions affected Red Hat / Red Hat Enterprise Linux 8.6 Extended Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 8.8 Extended Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 8.8 Extended Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 9.0 Extended Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 9.0 Extended Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 9.0 Extended Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 9.2 Extended Update Support
All versions affected References
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 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:1903 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:1959 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:2086 access.redhat.com: https://access.redhat.com/security/cve/CVE-2023-40550 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2259915 lists.debian.org: https://lists.debian.org/debian-lts-announce/2024/05/msg00009.html