CVE-2024-45783: Grub2: fs/hfs+: refcount can be decremented twice

Severity: medium (CVSS 4.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-02-18 · updated 2026-10-21
Weakness: CWE-911

Description

A flaw was found in grub2. When failing to mount an HFS+ grub, the hfsplus filesystem driver doesn't properly set an ERRNO value. This issue may lead to a NULL pointer access.

Affected products

Red Hat OpenShift Container Platform 4.18: all versions
Red Hat Enterprise Linux 9: all versions — fixed in 1:2.06-104.el9_6

How to fix

Upgrade to a fixed version: Red Hat Enterprise Linux 9 1:2.06-104.el9_6. Check the vendor advisory for mitigations.

References

https://access.redhat.com/errata/RHSA-2025:6990
https://access.redhat.com/security/cve/CVE-2024-45783
https://bugzilla.redhat.com/show_bug.cgi?id=2345863

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