CVE-2021-33655
MEDIUMCVSS 6.7/10EPSS 0.30%
Last modified
CVE-2021-33655 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. When sending malicous data to kernel by ioctl cmd FBIOPUT_VSCREENINFO,kernel will write memory out of bounds.. EPSS estimates a 0.30% chance of exploitation in the next 30 days.
Description
When sending malicous data to kernel by ioctl cmd FBIOPUT_VSCREENINFO,kernel will write memory out of bounds.
Metrics
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Linux | Linux Kernel | < 5.19 | — |
| Linux | Linux Kernel | 5.19 | Rc1 |
| Debian | Debian Linux | 10.0 | — |
| Debian | Debian Linux | 11.0 | — |
References
- http://www.openwall.com/lists/oss-security/2022/07/19/2Mailing List, Patch, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=086ff84617185393a0bbf25830c4f36412a7d3f4Mailing List, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/10/msg00000.htmlMailing List, Third Party Advisory
- https://www.debian.org/security/2022/dsa-5191Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/07/19/2Mailing List, Patch, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=086ff84617185393a0bbf25830c4f36412a7d3f4Mailing List, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/10/msg00000.htmlMailing List, Third Party Advisory
- https://www.debian.org/security/2022/dsa-5191Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-33655?
When sending malicous data to kernel by ioctl cmd FBIOPUT_VSCREENINFO,kernel will write memory out of bounds.
How severe is CVE-2021-33655?
CVE-2021-33655 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.30% probability of exploitation in the next 30 days.
How do I fix CVE-2021-33655?
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-2021-33655?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST