NULL pointer dereference in Fedoraproject Fedora
CVE-2023-40546
A flaw was found in Shim when an error happened while creating a new ESL variable. If Shim fails to create the new variable, it tries to print an error message to the user; however, the number of parameters used by the logging function doesn't match the format string used by it, leading to a crash under certain circumstances.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (35.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.6% 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-2023-40546 (vdb-entry, Vendor Advisory)
Frequently asked questions
- What is CVE-2023-40546?
- CVE-2023-40546 is a medium-severity vulnerability in Fedoraproject Fedora, classified under NULL Pointer Dereference. CVSS score: 6.2/10. Published 2024-01-29.
- How severe is CVE-2023-40546?
- Medium severity. CVSS v3 base score is 6.2 out of 10.
- Is CVE-2023-40546 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.