CVE-2021-42739 Memory corruption in n/a
A buffer overflow in the Linux kernel firewire subsystem allows attackers to execute arbitrary code or escalate privileges.
- 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-2021-42739?
CVE-2021-42739 is a medium-severity memory corruption vulnerability in Debian Debian Linux, published on 20 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The firewire subsystem in the Linux kernel through 5.14.13 has a buffer overflow related to drivers/media/firewire/firedtv-avc.c and drivers/media/firewire/firedtv-ci.c, because avc_ca_pmt mishandles bounds checking.
Weakness: CWE-787
Which versions are affected by CVE-2021-42739?
It affects 8 products.
Linux distribution packages (1)
kgraft-patch-SLE12-SP5_Update_24 SUSE:Linux Enterprise Live Patching 12 SP5 | All versions | 4-2.2 |
Products include Debian Debian Linux, Fedoraproject Fedora, Linux kernel, Oracle Communications Cloud Native Core Binding Support Function, Oracle Communications Cloud Native Core Network Exposure Function, Oracle Communications Cloud Native Core Policy and 2 more.
How do I fix CVE-2021-42739?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-42739 being exploited?
There is no known exploitation of CVE-2021-42739 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-6601, CVE-2021-3542, DEBIAN-CVE-2021-42739, GHSA-f3hh-px86-x7cx, SUSE-SU-2022:0242-1, UBUNTU-CVE-2021-42739.