Use-after-free in Linux kernel - CVE-2019-25044
Published: May 15, 2021 / Updated: January 24, 2023
Vulnerability identifier: #VU83432
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-2019-25044
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local authenticated user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the block subsystem. A local authenticated user can trigger a use-after-free error and escalate privileges on the system.
Affected software
Linux kernel
How to mitigate CVE-2019-25044
Install update from vendor's website.
Linux kernel - update to 5.2
External References
- 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/