High severity7.5NVD Advisory· Published Mar 3, 2021· Updated Jun 17, 2026
CVE-2020-27779
CVE-2020-27779
Description
A flaw was found in grub2 in versions prior to 2.06. The cutmem command does not honor secure boot locking allowing an privileged attacker to remove address ranges from memory creating an opportunity to circumvent SecureBoot protections after proper triage about grub's memory layout. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
41- grub2/grub2description
- osv-coords39 versionspkg:rpm/almalinux/shim-aa64pkg:rpm/almalinux/shim-ia32pkg:rpm/almalinux/shim-unsigned-aarch64pkg:rpm/almalinux/shim-unsigned-x64pkg:rpm/almalinux/shim-x64pkg:rpm/opensuse/grub2&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/grub2&distro=openSUSE%20Tumbleweedpkg:rpm/suse/grub2&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/grub2&distro=SUSE%20Enterprise%20Storage%206pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOSpkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSSpkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP2pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSSpkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSSpkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCLpkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSSpkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/grub2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1pkg:rpm/suse/grub2&distro=SUSE%20Manager%20Proxy%204.0pkg:rpm/suse/grub2&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.0pkg:rpm/suse/grub2&distro=SUSE%20Manager%20Server%204.0pkg:rpm/suse/grub2&distro=SUSE%20OpenStack%20Cloud%207pkg:rpm/suse/grub2&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/grub2&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/grub2&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/grub2&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209
< 15.4-2.el8_1.alma+ 38 more
- (no CPE)range: < 15.4-2.el8_1.alma
- (no CPE)range: < 15.4-2.el8_1.alma
- (no CPE)range: < 15-7.el8_1.alma
- (no CPE)range: < 15.4-4.el8_1.alma
- (no CPE)range: < 15.4-2.el8_1.alma
- (no CPE)range: < 2.04-lp152.7.22.7
- (no CPE)range: < 2.06-7.1
- (no CPE)range: < 2.02-4.69.1
- (no CPE)range: < 2.02-26.43.1
- (no CPE)range: < 2.02-26.43.1
- (no CPE)range: < 2.02-26.43.1
- (no CPE)range: < 2.02-19.66.1
- (no CPE)range: < 2.02-19.66.1
- (no CPE)range: < 2.04-9.34.1
- (no CPE)range: < 2.04-9.34.1
- (no CPE)range: < 2.02-0.66.26.1
- (no CPE)range: < 2.02-115.59.1
- (no CPE)range: < 2.02-115.59.1
- (no CPE)range: < 2.02-4.69.1
- (no CPE)range: < 2.02-4.69.1
- (no CPE)range: < 2.02-12.47.1
- (no CPE)range: < 2.02-12.47.1
- (no CPE)range: < 2.02-26.43.1
- (no CPE)range: < 2.02-26.43.1
- (no CPE)range: < 2.02-19.66.1
- (no CPE)range: < 2.02-115.59.1
- (no CPE)range: < 2.02-4.69.1
- (no CPE)range: < 2.02-12.47.1
- (no CPE)range: < 2.02-12.47.1
- (no CPE)range: < 2.02-19.66.1
- (no CPE)range: < 2.02-26.43.1
- (no CPE)range: < 2.02-26.43.1
- (no CPE)range: < 2.02-26.43.1
- (no CPE)range: < 2.02-26.43.1
- (no CPE)range: < 2.02-115.59.1
- (no CPE)range: < 2.02-4.69.1
- (no CPE)range: < 2.02-12.47.1
- (no CPE)range: < 2.02-4.69.1
- (no CPE)range: < 2.02-12.47.1
Patches
Vulnerability mechanics
References
4- bugzilla.redhat.com/show_bug.cginvdIssue TrackingThird Party Advisory
- security.gentoo.org/glsa/202104-05nvdThird Party Advisory
- security.netapp.com/advisory/ntap-20220325-0001/nvdThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/nvd
News mentions
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