Medium severity · published Jun 9, 2022
CVE-2022-21499
KGDB and KDB allow read and write access to kernel memory, and thus should be restricted during lockdown
6.7
CVSS
0.6%
EPSS
No
On KEV
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).
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
11.0 · source: NVD
LI
Linux · Oracle
6; 7; 8 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-21499
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-21499
Third Party Advisory
http://packetstormsecurity.com/files/168191/Kernel-Live-Patch-Security-Notice-LSN-0089-1.html
Mailing List
https://git.kernel.org/linus/eadb2f47a3ced5c64b23b90fd2a3463f63726066
Third Party Advisory
https://www.debian.org/security/2022/dsa-5161
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