Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.9.7 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2020/11/25/1Mailing ListThird Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.7Release NotesVendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3cPatchVendor 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/q4/104ExploitMailing ListThird Party Advisory
- https://security.netapp.com/advisory/ntap-20210108-0003/Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/11/25/1Mailing ListThird Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.7Release NotesVendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3cPatchVendor 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/q4/104ExploitMailing ListThird Party Advisory
- https://security.netapp.com/advisory/ntap-20210108-0003/Third Party Advisory
FAQ
What is CVE-2020-28974?
CVE-2020-28974 is a vulnerability with a CVSS score of 5.0 (MEDIUM). 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 b...
How severe is CVE-2020-28974?
CVE-2020-28974 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-28974?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux.