Medium severity4.7NVD Advisory· Published Aug 22, 2022· Updated Jun 17, 2026
CVE-2021-3521
CVE-2021-3521
Description
There is a flaw in RPM's signature functionality. OpenPGP subkeys are associated with a primary key via a "binding signature." RPM does not check the binding signature of subkeys prior to importing them. If an attacker is able to add or socially engineer another party to add a malicious subkey to a legitimate public key, RPM could wrongly trust a malicious signature. The greatest impact of this flaw is to data integrity. To exploit this flaw, an attacker must either compromise an RPM repository or convince an administrator to install an untrusted RPM or public key. It is strongly recommended to only use RPMs and public keys from trusted sources.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
46- osv-coords43 versionspkg:rpm/almalinux/rpm-buildpkg:rpm/almalinux/rpm-plugin-fapolicydpkg:rpm/opensuse/python-rpm&distro=openSUSE%20Leap%2015.5pkg:rpm/opensuse/python-rpm&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/python-rpm&distro=openSUSE%20Leap%20Micro%205.4pkg:rpm/opensuse/rpm&distro=openSUSE%20Leap%2015.5pkg:rpm/opensuse/rpm&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/rpm&distro=openSUSE%20Leap%20Micro%205.4pkg:rpm/opensuse/rpm&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/rpm-ndb&distro=openSUSE%20Leap%2015.5pkg:rpm/opensuse/rpm-ndb&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/rpm-ndb&distro=openSUSE%20Leap%20Micro%205.4pkg:rpm/suse/python-rpm&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOSpkg:rpm/suse/python-rpm&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSSpkg:rpm/suse/python-rpm&distro=SUSE%20Linux%20Enterprise%20Micro%205.4pkg:rpm/suse/python-rpm&distro=SUSE%20Linux%20Enterprise%20Micro%205.5pkg:rpm/suse/python-rpm&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP5pkg:rpm/suse/python-rpm&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/python-rpm&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Python%203%2015%20SP5pkg:rpm/suse/python-rpm&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Python%203%2015%20SP6pkg:rpm/suse/python-rpm&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSSpkg:rpm/suse/python-rpm&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4pkg:rpm/suse/python-rpm&distro=SUSE%20Manager%20Proxy%204.3pkg:rpm/suse/python-rpm&distro=SUSE%20Manager%20Server%204.3pkg:rpm/suse/rpm&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOSpkg:rpm/suse/rpm&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSSpkg:rpm/suse/rpm&distro=SUSE%20Linux%20Enterprise%20Micro%205.4pkg:rpm/suse/rpm&distro=SUSE%20Linux%20Enterprise%20Micro%205.5pkg:rpm/suse/rpm&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP5pkg:rpm/suse/rpm&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/rpm&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP5pkg:rpm/suse/rpm&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/rpm&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSSpkg:rpm/suse/rpm&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4pkg:rpm/suse/rpm&distro=SUSE%20Manager%20Proxy%204.3pkg:rpm/suse/rpm&distro=SUSE%20Manager%20Proxy%20Module%204.3pkg:rpm/suse/rpm&distro=SUSE%20Manager%20Server%204.3pkg:rpm/suse/rpm&distro=SUSE%20Manager%20Server%20Module%204.3pkg:rpm/suse/rpm-ndb&distro=SUSE%20Linux%20Enterprise%20Micro%205.4pkg:rpm/suse/rpm-ndb&distro=SUSE%20Linux%20Enterprise%20Micro%205.5pkg:rpm/suse/rpm-ndb&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP4pkg:rpm/suse/rpm-ndb&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP5pkg:rpm/suse/rpm-ndb&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP6
< 4.14.3-19.el8_5.2+ 42 more
- (no CPE)range: < 4.14.3-19.el8_5.2
- (no CPE)range: < 4.14.3-19.el8_5.2
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.17.1-1.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
- (no CPE)range: < 4.14.3-150400.59.16.1
Patches
Vulnerability mechanics
References
5- bugzilla.redhat.com/show_bug.cginvdIssue TrackingPatchThird Party Advisory
- github.com/rpm-software-management/rpm/commit/bd36c5dc9fb6d90c46fbfed8c2d67516fc571ec8nvdPatchThird Party Advisory
- github.com/rpm-software-management/rpm/pull/1795/nvdPatchThird Party Advisory
- access.redhat.com/security/cve/CVE-2021-3521nvdThird Party Advisory
- security.gentoo.org/glsa/202210-22nvdThird Party Advisory
News mentions
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