Out-of-bounds Read in Fedoraproject Fedora
CVE-2023-40551
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (31.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Fedoraproject Fedora — versions 39
- Red Hat Enterprise Linux 7 — versions 0:15.8-3.el7, 0:15.8-1.el7
- Red Hat Enterprise Linux 8 — versions 0:15.8-4.el8_9
- Red Hat Enterprise Linux 8.2 Advanced Update Support — versions 0:15.8-2.el8_2
- Red Hat Enterprise Linux 8.2 Telecommunications Update Service — versions 0:15.8-2.el8_2
- Red Hat Enterprise Linux 8.2 Update Services For SAP Solutions — versions 0:15.8-2.el8_2
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support — versions 0:15.8-2.el8_4
- Red Hat Enterprise Linux 8.4 Telecommunications Update Service — versions 0:15.8-2.el8_4
- Red Hat Enterprise Linux 8.4 Update Services For SAP Solutions — versions 0:15.8-2.el8_4
- Red Hat Enterprise Linux 8.6 Extended Update Support — versions 0:15.8-2.el8_6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2024:1834 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:1835 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:1873 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:1876 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:1883 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:1902 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:1903 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:1959 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:2086 (vendor-advisory)
- access.redhat.com/security/cve/CVE-2023-40551 (vdb-entry, Vendor Advisory)
Frequently asked questions
- What is CVE-2023-40551?
- CVE-2023-40551 is a medium-severity vulnerability in Fedoraproject Fedora, classified under Out-of-bounds Read. CVSS score: 5.1/10. Published 2024-01-29.
- How severe is CVE-2023-40551?
- Medium severity. CVSS v3 base score is 5.1 out of 10.
- Is CVE-2023-40551 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.