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CVE-2021-3746

MEDIUM
6.5
CVSS Score
Published: October 19, 2021 at 02:07 PM UTC
Updated: June 17, 2026 at 04:05 AM UTC
3 products affected across 3 vendorsFedoraEnterprise LinuxLibtpms

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Severity
MEDIUM6.5
Exploit prediction
EPSS 1.0%

Description

A flaw was found in the libtpms code that may cause access beyond the boundary of internal buffers. The vulnerability is triggered by specially-crafted TPM2 command packets that then trigger the issue when the state of the TPM2's volatile state is written. The highest threat from this vulnerability is to system availability. This issue affects libtpms versions before 0.8.5, before 0.7.9 and before 0.6.6.

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%
0.6.0 ≤ v < 0.6.60.7.0 ≤ v < 0.7.90.8.0 ≤ v < 0.8.50.6.60.7.90.8.5
Affected range stops below 0.6.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.7.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.8.5, so it looks safe — our inference, not a vendor statement
Enterprise Linux· Red Hatrpm
95%
8.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCIssue TrackingPatchThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=1998588

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-119

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