Vulnerability Description
When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.
CVSS Score
6.8
MEDIUM
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openatom | Openeuler | 20.03 |
| Linux | Linux Kernel | < 5.10.127 |
| Debian | Debian Linux | 10.0 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2022/07/19/3Mailing ListPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/relPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/10/msg00000.htmlMailing ListThird Party Advisory
- https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656&packageNThird Party Advisory
- http://www.openwall.com/lists/oss-security/2022/07/19/3Mailing ListPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/relPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/10/msg00000.htmlMailing ListThird Party Advisory
- https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656&packageNThird Party Advisory
FAQ
What is CVE-2021-33656?
CVE-2021-33656 is a vulnerability with a CVSS score of 6.8 (MEDIUM). 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 been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-33656?
Check the references section above for vendor advisories and patch information. Affected products include: Openatom Openeuler, Linux Linux Kernel, Debian Debian Linux.