Heap-based buffer overflow in Linux kernel - CVE-2026-72470

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Main Vulnerability Database Vulnerabilities #VU142963

Heap-based buffer overflow in Linux kernel - CVE-2026-72470

Published: August 15, 2026


Vulnerability identifier: #VU142963
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-72470
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to cause a denial of service or execute arbitrary code.

The vulnerability exists due to a heap-based buffer overflow in the ntfs3 log replay scratch buffer handling in log_replay() and read_log_page() when mounting a dirty NTFS volume with an on-disk log page size larger than the initially allocated buffer. A local user can mount a specially crafted NTFS volume to cause a denial of service or execute arbitrary code.

Exploitation requires a dirty NTFS volume whose log records a larger page size than the mounting host initially allocated.


Affected software

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

How to mitigate CVE-2026-72470

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