CVE-2020-12656

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
References
Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*

Configuration 3 (hide)

OR cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*

History

07 Nov 2023, 03:15

Type Values Removed Values Added
Summary ** DISPUTED ** 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. 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

29 Apr 2022, 13:26

Type Values Removed Values Added
CPE cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
References (UBUNTU) https://usn.ubuntu.com/4485-1/ - (UBUNTU) https://usn.ubuntu.com/4485-1/ - Third Party Advisory
References (SUSE) http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html - (SUSE) http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html - Mailing List, Third Party Advisory
References (SUSE) http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html - (SUSE) http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html - Mailing List, Third Party Advisory
References (UBUNTU) https://usn.ubuntu.com/4483-1/ - (UBUNTU) https://usn.ubuntu.com/4483-1/ - Third Party Advisory
First Time Canonical ubuntu Linux
Canonical
Opensuse
Opensuse leap
CWE CWE-772 CWE-401

Information

Published : 2020-05-05 06:15

Updated : 2024-06-04 19:17


NVD link : CVE-2020-12656

Mitre link : CVE-2020-12656

CVE.ORG link : CVE-2020-12656


JSON object : View

Products Affected

linux

  • linux_kernel

canonical

  • ubuntu_linux

opensuse

  • leap
CWE
CWE-401

Missing Release of Memory after Effective Lifetime