GSD-2023-1001044 block, bfq: fix possible uaf for 'bfqq->bic'
A use-after-free vulnerability in the Linux Kernel BFQ block scheduler could allow local attackers to execute arbitrary code or escalate privileges.
- 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 GSD-2023-1001044?
GSD-2023-1001044 is an use after free vulnerability in Kernel, published on 17 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
block, bfq: fix possible uaf for 'bfqq->bic'
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 v5.15.86 by commit 094f3d9314d67691cb21ba091c1b528f6e3c4893, it was introduced in version v5.15.46 by commit 81b7d0c717a487ec50e2924a773ff501ee40f0d5. For more details please see the references link.
Which versions are affected by GSD-2023-1001044?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2023-1001044?
No fix has been published for GSD-2023-1001044 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-2023-1001044 being exploited?
There is no known exploitation of GSD-2023-1001044 in the wild and no public exploit code.