GSD-2022-1006420 sch_sfb: Don't assume the skb is still around after enqueueing to child
A use-after-free vulnerability in the Linux kernel's SFB scheduler allows attackers to cause denial of service or potentially execute code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2022-1006420?
GSD-2022-1006420 is an use after free vulnerability in Kernel, published on 2 Oct 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
sch_sfb: Don't assume the skb is still around after enqueueing to child
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 v5.4.213 by commit 279c7668e354fa151d5fd2e8c42b5153a1de3135, it was introduced in version v2.6.39 by commit e13e02a3c68d899169c78d9a18689bd73491d59a. For more details please see the references link.
Which versions are affected by GSD-2022-1006420?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2022-1006420?
No fix has been published for GSD-2022-1006420 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-2022-1006420 being exploited?
There is no known exploitation of GSD-2022-1006420 in the wild and no public exploit code.