SB2025062014 - NULL pointer dereference in Linux kernel xen driver
Published: June 20, 2025 Updated: June 21, 2025
Security Bulletin ID
SB2025062014
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) NULL pointer dereference (CVE-ID: CVE-2022-49989)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the lock_pages() and privcmd_ioctl_dm_op() functions in drivers/xen/privcmd.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/45d47bd9b96e7874b98dbcc7602fe2826c5d62a6
- https://git.kernel.org/stable/c/6de50db104af0dc921f593fd95c55db86a52ceef
- https://git.kernel.org/stable/c/c2b7bae7c90051fd6a679d5dee00400d67ebbf4a
- https://git.kernel.org/stable/c/c5deb27895e017a0267de0a20d140ad5fcc55a54
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.140
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.64
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.6
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0