Medium severity · published Dec 2, 2020
CVE-2020-25656
A flaw was found in the Linux kernel
4.1
CVSS
0.4%
EPSS
No
On KEV
Description
A flaw was found in the Linux kernel. A use-after-free was found in the way the console subsystem was using ioctls KDGKBSENT and KDSKBSENT. A local user could use this flaw to get read memory access out of bounds. The highest threat from this vulnerability is to data confidentiality.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
High
Privileges
High
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
before 5.10; 5.10 · source: NVD
DL
Debian Linux · Debian
9.0 · source: NVD
EL
Enterprise Linux · Redhat
7.0; 8.0 · source: NVD
SV
Starwind Virtual San · Starwindsoftware
v8; v8; v8; v8; v8; v8 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-25656
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-25656
Exploit
https://bugzilla.redhat.com/show_bug.cgi?id=1888726
Mailing List
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
Mailing List
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
Exploit
https://lkml.org/lkml/2020/10/16/84
Mailing List
https://lkml.org/lkml/2020/10/29/528
Third Party Advisory
https://www.starwindsoftware.com/security/sw-20210325-0006/
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