SB2024053148 - Use-after-free in Linux kernel kvm
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB2024053148
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-2021-47341)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the kvm_vm_ioctl_unregister_coalesced_mmio() function in virt/kvm/coalesced_mmio.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/f2ff9d03432fcb160e9f7d4be26174d89de2779a
- https://git.kernel.org/stable/c/679837dc0abaa2c6e2a7bcd86483e05eee1d5066
- https://git.kernel.org/stable/c/8d7c539316d652d217e5e82b89ee204c812a7061
- https://git.kernel.org/stable/c/069d44a24c0ff8f85adf49233aae7a8ca16f5c7e
- https://git.kernel.org/stable/c/23fa2e46a5556f787ce2ea1a315d3ab93cced204
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.52
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.19
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.134