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CVE-2021-3623

MEDIUM
6.1
CVSS Score
Published: March 2, 2022 at 10:02 PM UTC
Updated: June 17, 2026 at 04:05 AM UTC
3 products affected across 3 vendorsFedoraEnterprise LinuxLibtpms

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.3%

Description

A flaw was found in libtpms. The flaw can be triggered by specially-crafted TPM 2 command packets containing illegal values and may lead to an out-of-bounds access when the volatile state of the TPM 2 is marshalled/written or unmarshalled/read. The highest threat from this vulnerability is to system availability.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora· Fedora Projectrpm
95%
34
Libtpms· Libtpms Project
95%
v < 0.6.50.7.0 ≤ v < 0.7.80.8.0 ≤ v < 0.8.4Fixed-In - libtpms 0.6.5, libtpms 0.7.8, libtpms 0.8.4
Affected range stops below 0.6.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.7.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.8.4, so it looks safe — our inference, not a vendor statement
Enterprise Linux· Red Hatrpm
95%
8.0

References (6)

x_refsource_MISCIssue TrackingPatchThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=1976806
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/stefanberger/libtpms/commit/2e6173c
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/stefanberger/libtpms/commit/2f30d62
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/stefanberger/libtpms/commit/7981d9a
x_refsource_MISCIssue TrackingThird Party Advisory
Source: [email protected]
https://github.com/stefanberger/libtpms/pull/223
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7KZSYMTE7Z4BBEZUWO2DIMQDWMGEP46/

CVSS

6.1MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-787

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