CVE-2020-12656

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Summary

CVECVE-2020-12656
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-05-05 06:15:00 UTC
Updated2023-11-07 03:15:00 UTC
Description** 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.

Risk And Classification

Problem Types: CWE-401

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Canonical Ubuntu Linux 14.04 All All All
Operating System Canonical Ubuntu Linux 16.04 All All All
Operating System Canonical Ubuntu Linux 18.04 All All All
Operating System Canonical Ubuntu Linux 20.04 All All All
Operating System Linux Linux Kernel All All All All
Operating System Opensuse Leap 15.1 All All All
Operating System Opensuse Leap 15.2 All All All

References

ReferenceSourceLinkTags
USN-4483-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu UBUNTU usn.ubuntu.com
206651 – kmemleak in rpcsec_gss_krb5 MISC bugzilla.kernel.org Issue Tracking, Vendor Advisory
[security-announce] openSUSE-SU-2020:0935-1: important: Security update SUSE lists.opensuse.org
USN-4485-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu UBUNTU usn.ubuntu.com
[security-announce] openSUSE-SU-2020:0801-1: important: Security update SUSE lists.opensuse.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 353137 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.4-2022-014
  • 750376 OpenSUSE Security Update for RT kernel (openSUSE-SU-2021:0242-1)
  • 900076 CBL-Mariner Linux Security Update for kernel 5.4.91
  • 903607 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (1929)
  • 906096 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (1929-1)
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