CVE-2020-28974

low-risk
Published 2020-11-20

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.

Do I need to act?

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0.06% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.0/10 Medium
PHYSICAL / LOW complexity

Affected Products (2)

Affected Vendors

Debian Linux

References (14)

Mailing List http://www.openwall.com/lists/oss-security/2020/11/25/1
Release Notes https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.7
Patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c...
Third Party Advisory https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
Third Party Advisory https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
Exploit https://seclists.org/oss-sec/2020/q4/104
Third Party Advisory https://security.netapp.com/advisory/ntap-20210108-0003/
Mailing List http://www.openwall.com/lists/oss-security/2020/11/25/1
Release Notes https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.7
Patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c...
Third Party Advisory https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
Third Party Advisory https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
Exploit https://seclists.org/oss-sec/2020/q4/104
Third Party Advisory https://security.netapp.com/advisory/ntap-20210108-0003/
24
/ 100
low-risk
Severity 17/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 7/34 · Low