Resource exhaustion in Linux kernel - CVE-2020-8992
Published: February 14, 2020 / Updated: April 27, 2022
Vulnerability identifier: #VU92772
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2020-8992
CWE-ID: CWE-400
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
ext4_protect_reserved_inode in fs/ext4/block_validity.c in the Linux kernel through 5.5.3 allows attackers to cause a denial of service (soft lockup) via a crafted journal size.
How to mitigate CVE-2020-8992
Install update from vendor's repository.
Sources
- https://patchwork.ozlabs.org/patch/1236118/
- https://security.netapp.com/advisory/ntap-20200313-0003/
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
- https://usn.ubuntu.com/4318-1/
- https://usn.ubuntu.com/4324-1/
- https://usn.ubuntu.com/4344-1/
- https://usn.ubuntu.com/4342-1/
- https://usn.ubuntu.com/4419-1/