CVE-2020-12656

MediumCVSS 5.5/10Last modified Jun 17, 2026

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

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-401

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.htmlMailing List, Third Party Advisory
https://bugzilla.kernel.org/show_bug.cgi?id=206651Issue Tracking, Vendor Advisory
https://usn.ubuntu.com/4483-1/Third Party Advisory
https://usn.ubuntu.com/4485-1/Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.htmlMailing List, Third Party Advisory
https://bugzilla.kernel.org/show_bug.cgi?id=206651Issue Tracking, Vendor Advisory
https://usn.ubuntu.com/4483-1/Third Party Advisory
https://usn.ubuntu.com/4485-1/Third Party Advisory

Timeline

Published: May 5, 2020
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2020

CVE-2020-126577.8An issue was discovered in the Linux kernel before 5.6.5. There is a use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_b CVE-2020-126589.8gssproxy (aka gss-proxy) before 0.8.3 does not unlock cond_mutex before pthread exit in gp_worker_main() in gp_workers.c. NOTE: An upstream CVE-2020-126596.7An issue was discovered in the Linux kernel before 5.6.7. xdp_umem_reg in net/xdp/xdp_umem.c has an out-of-bounds write (by a user with the CVE-2020-12667.8An elevation of privilege vulnerability exists when the Windows kernel fails to properly handle objects in memory, aka 'Windows Kernel Eleva CVE-2020-126627.5Unbound before 1.10.1 has Insufficient Control of Network Message Volume, aka an "NXNSAttack" issue. This is triggered by random subdomains CVE-2020-126637.5Unbound before 1.10.1 has an infinite loop via malformed DNS answers received from upstream servers.CVE-2020-126666.1macaron before 1.3.7 has an open redirect in the static handler, as demonstrated by the http://127.0.0.1:4000//example.com/ URL.CVE-2020-126677.5Knot Resolver before 5.1.1 allows traffic amplification via a crafted DNS answer from an attacker-controlled server, aka an "NXNSAttack" iss CVE-2020-126686.5Jinjava before 2.5.4 allow access to arbitrary classes by calling Java methods on objects passed into a Jinjava context. This could allow fo CVE-2020-126698.8core/get_menudiv.php in Dolibarr before 11.0.4 allows remote authenticated attackers to bypass intended access restrictions via a non-alphan CVE-2020-12674.9This security update corrects a denial of service in the Local Security Authority Subsystem Service (LSASS) caused when an authenticated att CVE-2020-126706.1XSS exists in Webmin 1.941 and earlier affecting the Save function of the Read User Email Module / mailboxes Endpoint when attempting to sav