SB20240531145 - Use-after-free in Linux kernel net xen-netback driver
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB20240531145
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2021-47111)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the xenvif_disconnect_queue() and xenvif_connect_data() functions in drivers/net/xen-netback/interface.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/6b53db8c4c14b4e7256f058d202908b54a7b85b4
- https://git.kernel.org/stable/c/caec9bcaeb1a5f03f2d406305355c853af10c13e
- https://git.kernel.org/stable/c/107866a8eb0b664675a260f1ba0655010fac1e08
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.43
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13