GSD-2023-1002124 sched/core: Fix use-after-free bug in dup_user_cpus_ptr()
A use-after-free bug in the Linux kernel scheduler allows local attackers to potentially escalate privileges or execute code.
- 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-2023-1002124?
GSD-2023-1002124 is an use after free vulnerability in Kernel, published on 13 Feb 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
sched/core: Fix use-after-free bug in dup_user_cpus_ptr()
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 v5.15.89 by commit b22faa21b6230d5eccd233e1b7e0026a5002b287, it was introduced in version v5.15 by commit 07ec77a1d4e82526e1588979fff2f024f8e96df2. For more details please see the references link.
Which versions are affected by GSD-2023-1002124?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2023-1002124?
No fix has been published for GSD-2023-1002124 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-2023-1002124 being exploited?
There is no known exploitation of GSD-2023-1002124 in the wild and no public exploit code.