CVE-2019-20812

Description

An issue was discovered in the Linux kernel before 5.4.7. The prb_calc_retire_blk_tmo() function in net/packet/af_packet.c can result in a denial of service (CPU consumption and soft lockup) in a certain failure case involving TPACKET_V3, aka CID-b43d1f9f7067.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.06%
Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory kernel.org Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html vendor advisory
https://www.oracle.com/security-alerts/cpuApr2021.html
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b43d1f9f7067c6759b1051e8ecb84e82cef569fe patch vendor advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.7 release notes vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-20812?
CVE-2019-20812 has been scored as a medium severity vulnerability.
How to fix CVE-2019-20812?
To fix CVE-2019-20812, 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-2019-20812 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-20812 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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