GSD-2021-1001346 KVM: mmio: Fix use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio
A use-after-free vulnerability in the Linux Kernel KVM module allows local attackers with high privileges to potentially execute code or escalate privileges.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1001346?
GSD-2021-1001346 is an use after free vulnerability in Kernel, published on 3 Aug 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
KVM: mmio: Fix use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.4.134 by commit f2ff9d03432fcb160e9f7d4be26174d89de2779a, it was introduced in version v5.4.119 by commit 7d1bc32d6477ff96a32695ea4be8144e4513ab2d. For more details please see the references link.
Which versions are affected by GSD-2021-1001346?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001346?
No fix has been published for GSD-2021-1001346 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is GSD-2021-1001346 being exploited?
There is no known exploitation of GSD-2021-1001346 in the wild and no public exploit code.