SB2019112828 - Use after free in Linux kernel
Published: November 28, 2019
Security Bulletin ID
SB2019112828
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 security vulnerability.
1) Use after free (CVE-ID: CVE-2019-19318)
The vulnerability allows a local privileged user to perform a denial of service (DoS) attack.
In the Linux kernel 5.3.11, mounting a crafted btrfs image twice can cause an rwsem_down_write_slowpath use-after-free because (in rwsem_can_spin_on_owner in kernel/locking/rwsem.c) rwsem_owner_flags returns an already freed pointer,
Remediation
Install update from vendor's website.