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CVE-2020-25668

23
FAUCET Score

CVE-2020-25668 is a high-severity use-after-free vulnerability in the Linux Kernel, specifically affecting the fg_console global variable synchronization, impacting Debian, Linux, and NetApp products. With a CVSS score of 7.0, it allows a low-privileged local attacker to achieve high confidentiality, integrity, and availability impacts, though with high attack complexity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.4.242CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.5, < 4.9.242CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.10, < 4.14.204CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.15, < 4.19.155CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.20, < 5.4.75CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.0HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.0
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.03%
Probability of exploitation in next 30 days
EPSS Percentile
60.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0103 is in the 90th percentile among its peer group of 1,523 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.4 InfoSec Media, 0.1 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2020-25668

kernel: race condition in fg_console can lead to use-after-free in con_font_op

Oct 30, 2020

References

bugzilla.redhat.com / show_bug.cgi
git.kernel.org / pub/scm/linux/kernel/git/torvalds/linux.git/commit
Mailing ListPatchThird Party Advisory
lists.debian.org / debian-lts-announce/2020/12/msg00015.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2020/12/msg00027.html
Mailing ListThird Party Advisory
security.netapp.com / advisory/ntap-20210702-0005
Third Party Advisory
openwall.com / lists/oss-security/2020/10/30/1%2C
openwall.com / lists/oss-security/2020/11/04/3%2C
openwall.com / lists/oss-security/2020/10/30/1
ExploitMailing ListPatchThird Party Advisory
openwall.com / lists/oss-security/2020/11/04/3
ExploitMailing ListPatchThird Party Advisory