CVE-2020-28974

Public Exploit

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.

Category

5.0
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.06%
Vendor Advisory kernel.org Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c4e0dff2095c579b142d5a0693257f1c58b4804 patch vendor advisory
https://seclists.org/oss-sec/2020/q4/104 mailing list exploit third party advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.7 release notes vendor advisory
http://www.openwall.com/lists/oss-security/2020/11/25/1 third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html third party advisory mailing list
https://security.netapp.com/advisory/ntap-20210108-0003/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2020-28974?
CVE-2020-28974 has been scored as a medium severity vulnerability.
How to fix CVE-2020-28974?
To fix CVE-2020-28974, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-28974 being actively exploited in the wild?
It is possible that CVE-2020-28974 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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