GSD-2021-1001246 xdp, net: Fix use-after-free in bpf_xdp_link_release
A use-after-free vulnerability in the Linux kernel's XDP BPF link release allows local attackers to potentially execute code or escalate privileges.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1001246?
GSD-2021-1001246 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
xdp, net: Fix use-after-free in bpf_xdp_link_release
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 v5.10.54 by commit ca9ba1de8f09976b45ccc8e655c51c6201992139, it was introduced in version v5.9 by commit aa8d3a716b59db6c1ad6c68fb8aa05e31980da60. For more details please see the references link.
Which versions are affected by GSD-2021-1001246?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001246?
No fix has been published for GSD-2021-1001246 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-2021-1001246 being exploited?
There is no known exploitation of GSD-2021-1001246 in the wild and no public exploit code.