CVE-2021-47017 ath10k: Fix a use after free in ath10k_htc_send_bundle
A use-after-free vulnerability in the ath10k Wi-Fi driver allows attackers to potentially execute code or cause a system crash.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-47017?
CVE-2021-47017 is a high-severity use after free vulnerability in Linux kernel, published on 28 Feb 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ath10k: Fix a use after free in ath10k_htc_send_bundle
In ath10k_htc_send_bundle, the bundle_skb could be freed by dev_kfree_skb_any(bundle_skb). But the bundle_skb is used later by bundle_skb->len.
As skb_len = bundle_skb->len, my patch replaces bundle_skb->len to skb_len after the bundle_skb was freed.
Weakness: CWE-416
Which versions are affected by CVE-2021-47017?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-47017?
Apply the vendor's patch.
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 CVE-2021-47017 being exploited?
There is no known exploitation of CVE-2021-47017 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2021-47017, GHSA-66ww-hh28-59jg, UBUNTU-CVE-2021-47017.