OSV-2021-710 Heap-use-after-free in iov_from_buf_full
A heap-use-after-free in the Linux kernel's virtio-net driver allows attackers to cause denial of service or potentially execute code via crafted network packets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2021-710?
OSV-2021-710 is an use after free vulnerability in qemu, published on 1 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33785
Crash type: Heap-use-after-free WRITE 2
Crash state:
iov_from_buf_full
iov_from_buf
virtio_net_receive_rcu
Which versions are affected by OSV-2021-710?
1 open source package ship an affected version, including qemu.
| Package | Affected | Fixed in |
|---|---|---|
qemu OSS-Fuzz | All versions | None |
How do I fix OSV-2021-710?
No fix has been published for OSV-2021-710 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 OSV-2021-710 being exploited?
There is no known exploitation of OSV-2021-710 in the wild and no public exploit code.