GSD-2021-1000920 sch_cake: Fix out of bounds when parsing TCP options and header
An out-of-bounds read in the Linux kernel's CAKE qdisc allows attackers to cause denial of service or potentially execute code via crafted TCP packets.
- 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-2021-1000920?
GSD-2021-1000920 is a memory corruption vulnerability in Kernel, published on 30 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
sch_cake: Fix out of bounds when parsing TCP options and header
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 v5.4.128 by commit 4cefa061fc63f4d2dff5ab4083f43857cd7a2335, it was introduced in version v4.19 by commit 8b7138814f29933898ecd31dfc83e35a30ee69f5. For more details please see the references link.
Which versions are affected by GSD-2021-1000920?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000920?
No fix has been published for GSD-2021-1000920 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is GSD-2021-1000920 being exploited?
There is no known exploitation of GSD-2021-1000920 in the wild and no public exploit code.