CVE-2020-14309

Name: CVE-2020-14309
Creator: NVD / NIST
Published: 2020-07-30T13:15:10.987+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.7/10EPSS 0.48%

Last modified Jun 17, 2026

CVE-2020-14309 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. There's an issue with grub2 in all versions before 2.06 when handling squashfs filesystems containing a symbolic link with name length of UINT32 bytes in size. The name size leads to an arithmetic overflow leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled data.. EPSS estimates a 0.48% chance of exploitation in the next 30 days.

Description

There's an issue with grub2 in all versions before 2.06 when handling squashfs filesystems containing a symbolic link with name length of UINT32 bytes in size. The name size leads to an arithmetic overflow leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled data.

Metrics

CVSS 3.1

6.7/10

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

EPSS Probability

0.48%

37.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Gnu	Grub2	< 2.06
Opensuse	Leap	15.1
Opensuse	Leap	15.2

References

http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.htmlMailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1852022Issue Tracking, Third Party Advisory
https://security.gentoo.org/glsa/202104-05Third Party Advisory
https://security.netapp.com/advisory/ntap-20200731-0008/Third Party Advisory
https://usn.ubuntu.com/4432-1/Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.htmlMailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1852022Issue Tracking, Third Party Advisory
https://security.gentoo.org/glsa/202104-05Third Party Advisory
https://security.netapp.com/advisory/ntap-20200731-0008/Third Party Advisory
https://usn.ubuntu.com/4432-1/Third Party Advisory

Timeline

Published: Jul 30, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-14309?

How severe is CVE-2020-14309?

CVE-2020-14309 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.48% probability of exploitation in the next 30 days.

How do I fix CVE-2020-14309?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-14309?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST