What is CVE-2021-46705?

CVE-2021-46705 is a medium-severity vulnerability in GNU Grub2, classified under Insecure Temporary File. CVSS score: 5.1/10. Published 2022-03-16.

How severe is CVE-2021-46705?

Medium severity. CVSS v3 base score is 5.1 out of 10.

Vulnerability in GNU Grub2

CVE-2021-46705

A Insecure Temporary File vulnerability in grub-once of grub2 in SUSE Linux Enterprise Server 15 SP4, openSUSE Factory allows local attackers to truncate arbitrary files. This issue affects: SUSE Linux Enterprise Server 15 SP4 grub2 versions prior to 2.06-150400.7.1. SUSE openSUSE Factory grub2 versions prior to 2.06-18.1.

Published 2022-03-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.

EPSS exploit prediction

EPSS: 0.002 (14.2th percentile), scored 2026-10-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

GNU Grub2
openSUSE Factory
SUSE Linux Enterprise Server — versions 15
SUSE openSUSE Factory — versions grub2
SUSE Linux Enterprise Server 15 Sp4 — versions grub2

Weakness classification (CWE)

CWE-377 — Insecure Temporary File

References

bugzilla.suse.com/show_bug.cgi (Exploit, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2021-46705?: CVE-2021-46705 is a medium-severity vulnerability in GNU Grub2, classified under Insecure Temporary File. CVSS score: 5.1/10. Published 2022-03-16.
How severe is CVE-2021-46705?: Medium severity. CVSS v3 base score is 5.1 out of 10.