CVE-2022-28736

low-risk
Published 2023-07-20

There's a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up operating systems that doesn't support multiboot and do not have direct support from GRUB2. When executing chainloader more than once a use-after-free vulnerability is triggered. If an attacker can control the GRUB2's memory allocation pattern sensitive data may be exposed and arbitrary code execution can be achieved.

Do I need to act?

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0.03% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.4/10 Medium
LOCAL / HIGH complexity

Affected Products (1)

Affected Vendors

Gnu

References (6)

Third Party Advisory https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28736
https://security.netapp.com/advisory/ntap-20230825-0002/
Mailing List https://www.openwall.com/lists/oss-security/2022/06/07/5
Third Party Advisory https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28736
https://security.netapp.com/advisory/ntap-20230825-0002/
Mailing List https://www.openwall.com/lists/oss-security/2022/06/07/5
22
/ 100
low-risk
Severity 17/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal