CVE-2026-31715: f2fs: fix UAF caused by decrementing sbi->nr_pages[] in f2fs_write_end_io()

Overview

Severity

Medium (CVSS 5.5)

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit Status

Not Exploited

Patch Tuesday

2026-May

Released

2026-05-02

Last Updated

2026-05-19

EPSS Score

0.12% (percentile: 2.1%)

Affected Products (4)

Open Source Software

• azl3 kernel 6.6.134.1-2 on Azure Linux 3.0
• azl3 kernel 6.6.138.1-1 on Azure Linux 3.0
• azl3 kernel 6.6.137.1-2 on Azure Linux 3.0
• azl3 kernel 6.6.139.1-1 on Azure Linux 3.0

Revision History

• 2026-05-02: Information published.
• 2026-05-04: Information published.
• 2026-05-06: Information published.
• 2026-05-11: Information published.
• 2026-05-17: Information published.
• 2026-05-19: Information published.