HIGH
CVE-2020-25668
CWE-362Published: May 26, 2021· Updated: Jun 17, 2026
7.0
CVSS v3.1
Official Description
A flaw was found in Linux Kernel because access to the global variable fg_console is not properly synchronized leading to a use after free in con_font_op.
Technical Analysis
CVE-2020-25668 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.0.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityHigh
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Vendors & Products
Debian1 product(s)
debian linux
Linux1 product(s)
linux kernel
netapp24 product(s)
cloud backupsolidfire \& hci management nodesolidfire baseboard management controller firmwaresolidfire baseboard management controllerh410c firmwareh410ch300s firmwareh300sh500s firmwareh500sh700s firmwareh700s+12
Source: NVD CPE · 26 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (18)
→
http://www.openwall.com/lists/oss-security/2020/10/30/1Exploit · Mailing List · Patch · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2020/11/04/3Exploit · Mailing List · Patch · Third Party Advisory
→
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=90bfdeef83f1d6c696039b6a917190dcbbad3220Mailing List · Patch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing List · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.htmlMailing List · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20210702-0005/Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2020/10/30/1Exploit · Mailing List · Patch · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2020/11/04/3Exploit · Mailing List · Patch · Third Party Advisory
→
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=90bfdeef83f1d6c696039b6a917190dcbbad3220Mailing List · Patch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing List · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.htmlMailing List · Third Party Advisory
Quick Facts
CVE IDCVE-2020-25668
CVSS Score7.0 / 10
SeverityHIGH
WeaknessCWE-362
CISA KEVNo
Affected3 vendor(s)
PublishedMay 26, 2021
Related CVEs (CWE-362)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-25668 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.