CVE-2021-33656
MEDIUMCVSS 6.8/10EPSS 0.54%
Last modified
CVE-2021-33656 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.. EPSS estimates a 0.54% chance of exploitation in the next 30 days.
Description
When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.
Metrics
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Openatom | Openeuler | 20.03 |
| Linux | Linux Kernel | < 5.10.127 |
| Debian | Debian Linux | 10.0 |
References
- http://www.openwall.com/lists/oss-security/2022/07/19/3Mailing List, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/10/msg00000.htmlMailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/07/19/3Mailing List, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/10/msg00000.htmlMailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-33656?
When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.
How severe is CVE-2021-33656?
CVE-2021-33656 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 0.54% probability of exploitation in the next 30 days.
How do I fix CVE-2021-33656?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-33656?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST