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Vulnerability · Published Mar 3, 2025 · Assigned by redhat

CVE-2025-0689Grub2: udf: heap based buffer overflow in grub_udf_read_block() may lead to arbitrary code execution

High 7.8

In plain English

A high-severity buffer overflow in grub2. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.5%top 57.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

When reading data from disk, the grub's UDF filesystem module utilizes the user controlled data length metadata to allocate its internal buffers. In certain scenarios, while iterating through disk sectors, it assumes the read size from the disk is always smaller than the allocated buffer size which is not guaranteed. A crafted filesystem image may lead to a heap-based buffer overflow resulting in critical data to be corrupted, resulting in the risk of arbitrary code execution by-passing secure boot protections.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12grub22.06-13+deb12u2DEBIAN-CVE-2025-0689
Debian:13grub22.12-6DEBIAN-CVE-2025-0689
Debian:14grub22.12-6DEBIAN-CVE-2025-0689
Ubuntu:22.04:LTSgrub2-signedno fix listedUBUNTU-CVE-2025-0689
Ubuntu:24.04:LTSgrub2-signedno fix listedUBUNTU-CVE-2025-0689
Ubuntu:25.10grub2-signedno fix listedUBUNTU-CVE-2025-0689
Ubuntu:26.04:LTSgrub2-signedno fix listedUBUNTU-CVE-2025-0689
Ubuntu:26.10grub2-signedno fix listedUBUNTU-CVE-2025-0689
Ubuntu:22.04:LTSgrub2-unsignedno fix listedUBUNTU-CVE-2025-0689
Ubuntu:24.04:LTSgrub2-unsignedno fix listedUBUNTU-CVE-2025-0689
Ubuntu:25.10grub2-unsignedno fix listedUBUNTU-CVE-2025-0689
Ubuntu:26.04:LTSgrub2-unsignedno fix listedUBUNTU-CVE-2025-0689
Ubuntu:26.10grub2-unsignedno fix listedUBUNTU-CVE-2025-0689

Affected products (as reported)

VendorProductVersions
grub2 0 – through 2.12
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references

Weakness: CWE-120 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References