CVE-2022-21499

NameCVE-2022-21499
DescriptionKGDB 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).
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
ReferencesDSA-5161-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)buster4.19.249-2vulnerable
buster (security)4.19.260-1vulnerable
bullseye5.10.140-1fixed
bullseye (security)5.10.149-2fixed
bookworm6.0.10-1fixed
sid6.0.10-2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsourcestretch(not affected)
linuxsourcebullseye5.10.120-1DSA-5161-1
linuxsource(unstable)5.17.11-1

Notes

[buster] - linux <ignored> (kgdb not enabled)
[stretch] - linux <not-affected> (Vulnerable code not present)
https://www.openwall.com/lists/oss-security/2022/05/24/7
https://git.kernel.org/linus/eadb2f47a3ced5c64b23b90fd2a3463f63726066 (5.19-rc1)

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