CVE-2026-89793: ublk: clear VM_MAYWRITE on read-only ublk char device mmap

Overview

Severity

High (CVSS 7.8)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-09-17

EPSS Score

0.21% (percentile: 11.2%)

Affected Products (1)

Other

• 21684-17084

Security Updates (1)

• Security Update

Revision History

• 2026-09-17: Information published.