CVE-2019-25044 Information

Description

The block subsystem in the Linux kernel before 5.2 has a use-after-free that can lead to arbitrary code execution in the kernel context and privilege escalation aka CID-c3e2219216c9. This is related to blk_mq_free_rqs and blk_cleanup_queue.

CVSS Vector

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

Reference

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c3e2219216c92919a6bd1711f340f5faa98695e6 https://syzkaller.appspot.com/bug?id=36fe241584203cf394d44560a42e3430434f1213 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2 https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-blk_mq_free_rqs https://security.netapp.com/advisory/ntap-20210629-0006/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8