CVE-2020-12656

Description

gss_mech_free in net/sunrpc/auth_gss/gss_mech_switch.c in the rpcsec_gss_krb5 implementation in the Linux kernel through 5.6.10 lacks certain domain_release calls, leading to a memory leak. Note: This was disputed with the assertion that the issue does not grant any access not already available. It is a problem that on unloading a specific kernel module some memory is leaked, but loading kernel modules is a privileged operation. A user could also write a kernel module to consume any amount of memory they like and load that replicating the effect of this bug

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 ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugzilla.kernel.org/show_bug.cgi?id=206651 issue tracking vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html mailing list third party advisory vendor advisory
https://usn.ubuntu.com/4483-1/ third party advisory vendor advisory
https://usn.ubuntu.com/4485-1/ third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-12656?
CVE-2020-12656 has been scored as a medium severity vulnerability.
How to fix CVE-2020-12656?
To fix CVE-2020-12656, 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-2020-12656 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-12656 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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