Integer overflow in Linux kernel - CVE-2026-72369

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Main Vulnerability Database Vulnerabilities #VU143069

Integer overflow in Linux kernel - CVE-2026-72369

Published: August 16, 2026


Vulnerability identifier: #VU143069
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-72369
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows an attacker with physical access to cause a denial of service.

The vulnerability exists due to an integer overflow in minix_blocks_needed() in the Minix filesystem superblock handling when mounting a crafted Minix v3 filesystem image. An attacker with physical access can provide a crafted filesystem image with inode or zone counts near UINT_MAX to trigger a kernel panic.

The issue occurs because a zero bitmap block count can be accepted as valid, leading minix_fill_super() to dereference s_imap[0] or s_zmap[0] without allocated bitmap buffers.


Affected software

Linux kernel
Ubuntu
linux-gcp-7.0 (Ubuntu package)
linux-azure-7.0 (Ubuntu package)

How to mitigate CVE-2026-72369

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux-gcp-7.0 (Ubuntu package) - addressed in versions 7.0.0-38.38~24.04.4, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14~24.04.1
linux-azure-7.0 (Ubuntu package) - addressed in versions 7.0.0-1016.16~24.04.1, 7.0.0-1017.17~24.04.1

External References

Related Security Bulletins