How severe is CVE-2022-28737?

CVE-2022-28737 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-28737 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-28737?

CVE-2022-28737 affects Redhat Shim. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-28737?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-28737 published?

CVE-2022-28737 was published on 2023-07-20 and last updated on 2026-06-17.

CVE-2022-28737

CVE-2022-28737 is a medium-severity vulnerability in Redhat Shim with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Redhat Shim
Published: 2023-07-20
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2022-28737?: 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.
How severe is CVE-2022-28737?: CVE-2022-28737 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-28737 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-28737?: CVE-2022-28737 affects Redhat Shim. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-28737?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-28737 published?: CVE-2022-28737 was published on 2023-07-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:redhat:shim:*:*:*:*:*:*:*:*

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