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CVE-2022-21499

• Severity: medium (CVSS 4.6 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-06-09 · updated 2026-06-17
• Weakness: CWE-787

Description

KGDB and KDB allow read and write access to kernel memory, and thus should be restricted during lockdown. An attacker with access to a serial port could trigger the debugger so it is important that the debugger respect the lockdown mode when/if it is triggered. CVSS 3.1 Base Score 6.7 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).

Affected products

• Debian Linux: 11.0
• Oracle Corporation Oracle Linux: 6, 7, 8

References

• http://packetstormsecurity.com/files/168191/Kernel-Live-Patch-Security-Notice-LSN-0089-1.html
• https://git.kernel.org/linus/eadb2f47a3ced5c64b23b90fd2a3463f63726066
• https://www.debian.org/security/2022/dsa-5161
• http://packetstormsecurity.com/files/168191/Kernel-Live-Patch-Security-Notice-LSN-0089-1.html
• https://git.kernel.org/linus/eadb2f47a3ced5c64b23b90fd2a3463f63726066
• https://www.debian.org/security/2022/dsa-5161

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