SB2020020403 - Denial of service in Linux Kernel
Published: February 4, 2020
Security Bulletin ID
SB2020020403
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2020-8428)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a use-after-free error within the "may_create_in_sticky" in "fs/namei.c". A local user can cause a denial of service (OOPS) or possibly obtain sensitive information from kernel memory.
Remediation
Install update from vendor's website.
References
- http://www.openwall.com/lists/oss-security/2020/01/28/4
- http://www.openwall.com/lists/oss-security/2020/02/02/1
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d0cb50185ae942b03c4327be322055d622dc79f6
- https://github.com/torvalds/linux/commit/d0cb50185ae942b03c4327be322055d622dc79f6
- https://www.openwall.com/lists/oss-security/2020/01/28/2