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CVE-2022-23645

21
FAUCET Score

CVE-2022-23645 is an out-of-bounds read vulnerability affecting swtpm, a TPM emulator, in versions prior to 0.5.3, 0.6.2, and 0.7.1, impacting various Fedora and Red Hat Enterprise Linux products. A specially crafted swtpm state header can lead to an out-of-bounds access, causing the swtpm service to crash or fail to start. With a CVSS score of 5.5 (Medium), this vulnerability has a low attack complexity and requires local access and low privileges, primarily resulting in a high impact on availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion, and it is not listed on CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.5.3CPE matchmatch criteria
cpe:2.3:a:swtpm_project:swtpm:*:*:*:*:*:*:*:*
>= 0.6.0, < 0.6.2CPE matchmatch criteria
cpe:2.3:a:swtpm_project:swtpm:*:*:*:*:*:*:*:*
0.7.0CPE matchmatch criteria
cpe:2.3:a:swtpm_project:swtpm:0.7.0:-:*:*:*:*:*:*
0.7.0CPE matchmatch criteria
cpe:2.3:a:swtpm_project:swtpm:0.7.0:rc1:*:*:*:*:*:*
0.7.0CPE matchmatch criteria
cpe:2.3:a:swtpm_project:swtpm:0.7.0:rc2:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.2MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.5
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
33.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0040 is in the 88th percentile among its peer group of 15,938 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: virt-devel:rhel-8070020220921004438.3b9f49c4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: virt:rhel-8070020220921004438.3b9f49c4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: swtpm-0:0.7.0-3.20211109gitb79fd91.el9
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8 Advanced VirtualizationFixed in: virt:av/swtpm

Vendor Advisories (1)

redhatCVE-2022-23645Low

swtpm: Unchecked header size indicator against expected size

Feb 18, 2022

References

github.com / stefanberger/swtpm/commit/9f740868fc36761de27df3935513bdebf8852d19
PatchThird Party Advisory
github.com / stefanberger/swtpm/releases/tag/v0.5.3
Release NotesThird Party Advisory
github.com / stefanberger/swtpm/releases/tag/v0.6.2
Release NotesThird Party Advisory
github.com / stefanberger/swtpm/releases/tag/v0.7.1
Release NotesThird Party Advisory
github.com / stefanberger/swtpm/security/advisories/GHSA-2qgm-8xf4-3hqw
PatchThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/WL735FW266GO4C2JX4CJBOIOB7R7AY5A