CVE-2023-40546

Shim: out-of-bounds read printing error messages

State: Published
Severity: 6.2 Medium
Published: Jan 29, 2024
Updated: Nov 20, 2025
Reserved: Aug 15, 2023

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	6.2 Medium	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	redhat

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
Red Hat Enterprise Linux 7Red Hat	0:15.8-3.el7 and laterNot affected
Red Hat Enterprise Linux 7Red Hat	0:15.8-1.el7 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	0:15.8-4.el8_9 and laterNot affected
Red Hat Enterprise Linux 8.2 Advanced Update SupportRed Hat	0:15.8-2.el8_2 and laterNot affected
Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceRed Hat	0:15.8-2.el8_2 and laterNot affected
Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsRed Hat	0:15.8-2.el8_2 and laterNot affected
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat	0:15.8-2.el8_4 and laterNot affected
Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceRed Hat	0:15.8-2.el8_4 and laterNot affected
Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsRed Hat	0:15.8-2.el8_4 and laterNot affected
Red Hat Enterprise Linux 8.6 Extended Update SupportRed Hat	0:15.8-2.el8_6 and laterNot affected
Red Hat Enterprise Linux 8.8 Extended Update SupportRed Hat	0:15.8-2.el8 and laterNot affected
Red Hat Enterprise Linux 8.8 Extended Update SupportRed Hat	0:15.8-2.el8 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:15.8-4.el9_3 and laterNot affected
Red Hat Enterprise Linux 9.0 Extended Update SupportRed Hat	0:15.8-3.el9 and laterNot affected
Red Hat Enterprise Linux 9.0 Extended Update SupportRed Hat	0:15.8-2.el9 and laterNot affected
Red Hat Enterprise Linux 9.0 Extended Update SupportRed Hat	0:15.8-2.el9 and laterNot affected
Red Hat Enterprise Linux 9.2 Extended Update SupportRed Hat	0:15.8-3.el9_2 and laterNot affected

References

RHSA-2024:1834vendor-advisory
RHSA-2024:1835vendor-advisory
RHSA-2024:1873vendor-advisory
RHSA-2024:1876vendor-advisory
RHSA-2024:1883vendor-advisory
RHSA-2024:1902vendor-advisory
RHSA-2024:1903vendor-advisory
RHSA-2024:1959vendor-advisory
RHSA-2024:2086vendor-advisory
https://access.redhat.com/security/cve/CVE-2023-40546vdb-entry
RHBZ#2241796issue-tracking
https://lists.debian.org/debian-lts-announce/2024/05/msg00009.html

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