GSD-2023-1000966 block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq
A use-after-free vulnerability in the Linux Kernel BFQ I/O scheduler allows local attackers to potentially execute 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-2023-1000966?
GSD-2023-1000966 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 uaf for bfqq in bfq_exit_icq_bfqq
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 v5.15.87 by commit 7949b0df3dd9f4817ed4a4e989fa9ee81df6205f, it was introduced in version v5.15.86 by commit 094f3d9314d67691cb21ba091c1b528f6e3c4893. For more details please see the references link.
Which versions are affected by GSD-2023-1000966?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2023-1000966?
No fix has been published for GSD-2023-1000966 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-2023-1000966 being exploited?
There is no known exploitation of GSD-2023-1000966 in the wild and no public exploit code.