CVE-2022-21499: debian debian_linux Out-of-bounds Write
Vulnerability summary
CVE-2022-21499 is a medium (CVSS 6.7) Out-of-bounds Write vulnerability in debian debian_linux. EPSS estimates a 0.62% chance of exploitation in the next 30 days, higher than 49.7% of scored vulnerabilities.
Not severe (CVSS 6.7, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 34 · Related 24Timeline
- 09-06-2022PublishedVulnerability first disclosed.
- 24-09-2024Last modifiedVulnerability information updated.
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 metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated6.7MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated6.7MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- NVDNIST6.7MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.62%
Chance of exploitation in the next 30 days
Percentile
50%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.62% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu73 products
- linux< 5.4.0-117.132 | < 5.15.0-37.39
- linux-aws< 5.4.0-1078.84 | < 5.15.0-1011.14
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
- linux-aws-5.13< 5.13.0-1028.31~20.04.1
Debian2 products
- linux< 5.17.11-1
- debian_linuxEOL11.0
Oracle corporation2 products
- oracle linuxOracle Linux: 6 | Oracle Linux: 7 | Oracle Linux: 8
- oracle vmOracle VM: 3
Oracle1 product
- linuxEOL6 | 7 | 8
4 vendors · 78 products
References
16 links- git.kernel.org/linus/eadb2f47a3ced5c64b23b90fd2a3463f63726066X Refsource MISCMailing ListPatchVendor Advisory
- packetstormsecurity.com/files/168191/Kernel-Live-Patch-Security-Notice-LSN-0089-1.htmlX Refsource MISCThird Party AdvisoryVDB Entry