← Vulnerability feed

Vulnerability record · CVE-2022-28737 · published 20 July 2023

CVE-2022-28737: Redhat shim out-of-bounds write vulnerability

Redhat · Shim

There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables; The handle_image() function takes into account the SizeOfRawData field from each section to be loaded. An attacker can leverage this to perform out-of-bound writes into memory. Arbitrary code execution is not discarded in such scenario.

7.8 CVSS 3.1 High EPSS 0.33% · top 76.6% CWE-787 · Out-of-bounds write
7.8CVSS 3.1 base score
0.33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables; The handle_image() function takes into account the SizeOfRawData field from each section to be loaded. An attacker can leverage this to perform out-of-bound writes into memory. Arbitrary code execution is not discarded in such scenario.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28737 Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/06/07/5 Mailing ListThird Party Advisory
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28737 Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/06/07/5 Mailing ListThird Party Advisory

Track CVE-2022-28737 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.3CVE-2023-40547Redhat shim out-of-bounds write vulnerabilityA remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This …EPSS 5.4%7.5CVE-2014-3676Redhat shim out-of-bounds write vulnerabilityHeap-based buffer overflow in Shim allows remote attackers to execute arbitrary code via a crafted IPv6 address, related to the "tftp:// DHCPv6 boot …EPSS 5.2%7.5CVE-2014-3677Redhat shim vulnerabilityUnspecified vulnerability in Shim might allow attackers to execute arbitrary code via a crafted MOK list, which triggers memory corruption.EPSS 2.7%7.4CVE-2023-40548Redhat shim integer overflow vulnerabilityA buffer overflow was found in Shim in the 32-bit system. The overflow happens due to an addition operation involving a user-controlled value parsed …EPSS 0.44%5.5CVE-2023-40546Redhat shim null pointer dereference vulnerabilityA flaw was found in Shim when an error happened while creating a new ESL variable. If Shim fails to create the new variable, it tries to print an err…EPSS 0.44%5.5CVE-2023-40549Redhat shim out-of-bounds read vulnerabilityAn out-of-bounds read flaw was found in Shim due to the lack of proper boundary verification during the load of a PE binary. This flaw allows an atta…EPSS 0.41%5.5CVE-2023-40550Redhat shim out-of-bounds read vulnerabilityAn out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information. This issue may expose sensitive data during the system's…EPSS 0.40%5.1CVE-2023-40551Redhat shim out-of-bounds read vulnerabilityA flaw was found in the MZ binary format in Shim. An out-of-bounds read may occur, leading to a crash or possible exposure of sensitive data during t…EPSS 0.40%

Source: NIST National Vulnerability Database (record CVE-2022-28737), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.