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Vulnerability record · CVE-2020-14314 · published 15 September 2020

CVE-2020-14314: Linux kernel out-of-bounds read vulnerability

Linux · Linux Kernel

A memory out-of-bounds read flaw was found in the Linux kernel before 5.9-rc2 with the ext3/ext4 file system, in the way it accesses a directory with broken indexing. This flaw allows a local user to crash the system if the directory exists. The highest threat from this vulnerability is to system availability.

5.5 CVSS 3.1 Medium EPSS 0.37% · top 71.5% CWE-125 · Out-of-bounds read
5.5CVSS 3.1 base score, v2 2.1
0.37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
20References
17 Jun 2026Last modified by NVD

Description

A memory out-of-bounds read flaw was found in the Linux kernel before 5.9-rc2 with the ext3/ext4 file system, in the way it accesses a directory with broken indexing. This flaw allows a local user to crash the system if the directory exists. The highest threat from this vulnerability is to system availability.

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

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14314 Issue TrackingThird Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5872331b3d91820e14716632ebb56b1399b34fe1 PatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html Mailing ListThird Party Advisory
https://lore.kernel.org/linux-ext4/f53e246b-647c-64bb-16ec-135383c70ad7%40redhat.com/T/#u
https://usn.ubuntu.com/4576-1/ Third Party Advisory
https://usn.ubuntu.com/4578-1/ Third Party Advisory
https://usn.ubuntu.com/4579-1/ Third Party Advisory
https://www.starwindsoftware.com/security/sw-20210325-0003/ Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14314 Issue TrackingThird Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5872331b3d91820e14716632ebb56b1399b34fe1 PatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html Mailing ListThird Party Advisory
https://lore.kernel.org/linux-ext4/f53e246b-647c-64bb-16ec-135383c70ad7%40redhat.com/T/#u
https://usn.ubuntu.com/4576-1/ Third Party Advisory
https://usn.ubuntu.com/4578-1/ Third Party Advisory
https://usn.ubuntu.com/4579-1/ Third Party Advisory
https://www.starwindsoftware.com/security/sw-20210325-0003/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-14314), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.