CVE-2020-12656

kernel: gss_mech_free in net/sunrpc/auth_gss/gss_mech_switch.c in the rpcsec_gss_krb5 implementation lacks certain domain_release calls, leading to a memory leak.

Published May 5, 2020 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
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

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Ubuntu USN Ubuntu USN USN-4483-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-4485-1 Linux kernel vulnerabilities
History
Type Values Removed Values Added
Metrics epss

{'score': 0.00057}

epss

{'score': 0.00118}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Aug 4, 2024, 12:04 PM
Reserved
May 5, 2020, 12:00 AM
Status
Modified
Published
May 5, 2020, 6:15 AM
Modified
Jun 17, 2026, 2:52 AM
Severity
Low
Public date
May 5, 2020, 12:00 AM