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CVE-2022-28737

23
FAUCET Score

CVE-2022-28737 is a high-severity vulnerability affecting Red Hat shim, where a possible overflow in the handle_image() function can lead to out-of-bound writes when processing crafted EFI executables. This flaw, rated 7.8 CVSS, allows an attacker to achieve arbitrary code execution with local access and user interaction. Despite its potential impact, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 15.6CPE matchmatch criteria
cpe:2.3:a:redhat:shim:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.6
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.33%
Probability of exploitation in next 30 days
EPSS Percentile
25.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0033 is in the 23rd percentile among its peer group of 11,617 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (26)

microsoftpatch availablevia msrc
Product: Azure Linux 3.0 x64Fixed in: 15.8-3
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 15.8-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 15.8-1
microsoftpatch availablevia msrc
Product: azl3 shim 15.4-2 on Azure Linux 3.0Fixed in: 15.8-5
microsoftpatch availablevia msrc
Product: azl3 shim-unsigned-x64 15.8-5 on Azure Linux 3.0Fixed in: 15.8-5
microsoftpatch availablevia msrc
Product: azl3 shim-unsigned-aarch64 15.8-5 on Azure Linux 3.0Fixed in: 15.8-5
microsoftpatch availablevia msrc
Product: azl3 shim 15.8-5 on Azure Linux 3.0Fixed in: 15.8-5
microsoftpatch availablevia msrc
Product: 19885-17084Fixed in: 15.8-5
microsoftpatch availablevia msrc
Product: 19887-17084Fixed in: 15.8-5
microsoftpatch availablevia msrc
Product: 19890-17084Fixed in: 15.8-5
microsoftpatch availablevia msrc
Product: 17012-17084Fixed in: 15.8-5
microsoftpatch availablevia msrc
Product: 17013-17084Fixed in: 15.8-5
microsoftpatch availablevia msrc
Product: 18175-17084Fixed in: 15.8-5
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 ARMFixed in: 15.8-3
microsoftpatch availablevia msrc
Product: azl3 shim-unsigned-aarch64 15.4-2 on Azure Linux 3.0Fixed in: 15.8-5
microsoftpatch availablevia msrc
Product: azl3 shim-unsigned-x64 15.4-3 on Azure Linux 3.0Fixed in: 15.8-5
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: shim-0:15.6-1.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: shim-unsigned-x64-0:15.6-1.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.1 Update Services for SAP SolutionsFixed in: shim-0:15.6-1.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Extended Update SupportFixed in: shim-0:15.6-1.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Extended Update SupportFixed in: shim-unsigned-x64-0:15.6-1.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Extended Update SupportFixed in: shim-0:15.6-1.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Extended Update SupportFixed in: shim-unsigned-x64-0:15.6-1.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: shim-0:15.6-1.el9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: shim-unsigned-x64-0:15.6-1.el9
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: shim

Vendor Advisories (3)

microsoft2024-Dec/CVE-2022-28737

CVE-2022-28737

Dec 10, 2024
microsoft2023-Jul/CVE-2022-28737Moderate

There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables

Jul 11, 2023
redhatCVE-2022-28737Moderate

shim: Buffer overflow when loading crafted EFI images

Jun 7, 2022

References

cve.mitre.org / cgi-bin/cvename.cgi
Third Party Advisory
openwall.com / lists/oss-security/2022/06/07/5
Mailing ListThird Party Advisory