GSD-2021-1000109 net/sched: sch_frag: fix stack OOB read while fragmenting IPv4 packets
A stack out-of-bounds read in the Linux kernel's IPv4 packet fragmentation code can lead to memory corruption or denial of service.
- 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-2021-1000109?
GSD-2021-1000109 is a memory corruption vulnerability in Kernel, published on 31 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
net/sched: sch_frag: fix stack OOB read while fragmenting IPv4 packets
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 v5.11.20 by commit 018bb8da5b5888e19585f9b802f036afe643fcef, it was introduced in version v5.11 by commit c129412f74e99b609f0a8e95fc3915af1fd40f34. For more details please see the references link.
Which versions are affected by GSD-2021-1000109?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000109?
No fix has been published for GSD-2021-1000109 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-2021-1000109 being exploited?
There is no known exploitation of GSD-2021-1000109 in the wild and no public exploit code.