CVE-2020-29660 Use after free in n/a
A locking inconsistency in the Linux kernel tty subsystem allows a read-after-free attack, potentially enabling code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-29660?
CVE-2020-29660 is a medium-severity use after free vulnerability in Broadcom Fabric Operating System, published on 9 Dec 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A locking inconsistency issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_io.c and drivers/tty/tty_jobctrl.c may allow a read-after-free attack against TIOCGSID, aka CID-c8bcd9c5be24.
Which versions are affected by CVE-2020-29660?
It affects 11 products.
Products include Broadcom Fabric Operating System, Debian Debian Linux, Fedoraproject Fedora, Linux kernel, Netapp 8300 Firmware, Netapp 8700 Firmware and 5 more.
How do I fix CVE-2020-29660?
Apply the vendor's patch.
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 CVE-2020-29660 being exploited?
There is no known exploitation of CVE-2020-29660 in the wild and no public exploit code.
Other vulnerabilities in Broadcom Fabric Operating System
Sources
Also known as A-175451844, ASB-A-175451844, DEBIAN-CVE-2020-29660, GHSA-6v44-4w2g-hxp9, UBUNTU-CVE-2020-29660.