CVE-2021-42739

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.

References

Link	Tags
https://lore.kernel.org/linux-media/YHaulytonFcW+lyZ%40mwanda/
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=35d2969ea3c7d32aee78066b1f3cf61a0d935a4e
https://seclists.org/oss-sec/2021/q2/46
https://bugzilla.redhat.com/show_bug.cgi?id=1951739	issue tracking third party advisory mitigation
https://www.oracle.com/security-alerts/cpujul2022.html	third party advisory patch
https://www.starwindsoftware.com/security/sw-20220804-0001/	third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-42739?: CVE-2021-42739 has been scored as a medium severity vulnerability.
How to fix CVE-2021-42739?: To fix CVE-2021-42739, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-42739 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-42739 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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Description

Category

CWE-787 – Out-of-bounds Write

References

Frequently Asked Questions