CVE-2020-28974
Last modified
CVE-2020-28974 is a medium-severity vulnerability rated 5/10 on the CVSS scale. A slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could be used by local attackers to read privileged information or potentially crash the kernel, aka CID-3c4e0dff2095. This occurs because KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for manipulations such as font height.. EPSS estimates a 0.51% chance of exploitation in the next 30 days.
Description
A slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could be used by local attackers to read privileged information or potentially crash the kernel, aka CID-3c4e0dff2095. This occurs because KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for manipulations such as font height.
Metrics
CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.9.7 |
| Debian | Debian Linux | 9.0 |
References
- http://www.openwall.com/lists/oss-security/2020/11/25/1Mailing List, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.7Release Notes, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00027.htmlThird Party Advisory
- https://seclists.org/oss-sec/2020/q4/104Exploit, Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210108-0003/Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/11/25/1Mailing List, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.7Release Notes, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00027.htmlThird Party Advisory
- https://seclists.org/oss-sec/2020/q4/104Exploit, Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210108-0003/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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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.
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