SB2019112130 - NULL pointer dereference in Linux kernel
Published: November 21, 2019 Updated: June 1, 2020
Security Bulletin ID
SB2019112130
Severity
Medium
Patch available
NO
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2019-19037)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in fs/ext4/namei.c in the Linux kernel through 5.3.12 allows a NULL pointer dereference because ext4_read_dirblock(inode,0,DIRENT_HTREE) can be zero. A remote attacker can perform a denial of service (DoS) attack.
Remediation
Cybersecurity Help is not aware of any official remediation provided by the vendor.
References
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.161
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.92
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.7
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.208
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.5