Disclosure summary
When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.
Source-reported weakness categories
CWE-787
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2021-33656
Open original source · Updated Oct 08, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| openatom | openeuler | 20.03 |
| openatom | openeuler | 20.03 |
| openatom | openeuler | 20.03 |
| linux | linux_kernel | * {"versionEndExcluding":"5.10.127"} |
| debian | debian_linux | 10.0 |
Original records & references
- NIST NVD record
- CVE Program record
- git.kernel.org — Patch, Third Party Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- www.openeuler.org — Third Party Advisory
- git.kernel.org — Patch, Third Party Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- www.openeuler.org — Third Party Advisory
PUBLISHED 2022-07-18T11:15:08-04:00
MODIFIED 2026-10-08T18:17:10-04:00
INGESTED 2026-10-10T20:50:21-04:00