high
7.8
CWE
416
Advisory Published
CVE Published
CVE Published
Updated

CVE-2022-28736: There's a use-after-free vulnerability in grub_cmd_chainloader() function

First published: Wed Jun 01 2022(Updated: )

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.

Credit: security@ubuntu.com security@ubuntu.com security@ubuntu.com

Affected SoftwareAffected VersionHow to fix
Gnu Grub2>=2.00<2.06-3
ubuntu/grub2<2.06-3
2.06-3
debian/grub2
2.06-3~deb10u1
2.06-3~deb10u3
2.06-3~deb11u5
2.06-3~deb11u4
2.06-13
2.12~rc1-9
redhat/grub2<1:2.02-123.el8_6.8
1:2.02-123.el8_6.8
redhat/grub2<1:2.02-87.el8_1.10
1:2.02-87.el8_1.10
redhat/grub2<1:2.02-87.el8_2.10
1:2.02-87.el8_2.10
redhat/grub2<1:2.02-99.el8_4.9
1:2.02-99.el8_4.9
redhat/grub2<1:2.06-27.el9_0.7
1:2.06-27.el9_0.7
redhat/grub<2.12
2.12

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2022-28736?

    CVE-2022-28736 is a use-after-free vulnerability found in the grub2 chainloader command.

  • What is the severity of CVE-2022-28736?

    The severity of CVE-2022-28736 is high with a CVSS score of 7.8.

  • How does CVE-2022-28736 affect the affected software?

    CVE-2022-28736 affects the GRUB2 package versions 1:2.02-123.el8_6.8, 1:2.02-87.el8_1.10, 1:2.02-87.el8_2.10, 1:2.02-99.el8_4.9, 1:2.06-27.el9_0.7, and GRUB package version 2.12.

  • How can I fix CVE-2022-28736?

    To fix CVE-2022-28736, it is recommended to update the affected GRUB2 package to version 1:2.02-123.el8_6.8, 1:2.02-87.el8_1.10, 1:2.02-87.el8_2.10, 1:2.02-99.el8_4.9, 1:2.06-27.el9_0.7, or update the GRUB package to version 2.12.

  • Where can I find more information about CVE-2022-28736?

    More information about CVE-2022-28736 can be found at the following references: [Openwall](https://www.openwall.com/lists/oss-security/2022/06/07/5), [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28736), [CVE](https://www.cve.org/CVERecord?id=CVE-2022-28736), [NVD](https://nvd.nist.gov/vuln/detail/CVE-2022-28736)

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