CVE-2020-25656
A use-after-free was found in the way the console subsystem was using ioctls KDGKBSENT and KDSKBSENT.
Does this matter?
Lower severity and a low EPSS score (0.44%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 4.1 MEDIUMCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.44% probability · 38th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel · redhat/enterprise linux · debian/debian linux · starwindsoftware/starwind virtual san
- Source
- secalert@redhat.com
EPSS 0.4% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1888726Exploit, Issue Tracking, 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://lkml.org/lkml/2020/10/16/84Exploit, Mailing List, Third Party Advisory
- https://lkml.org/lkml/2020/10/29/528Mailing List, Patch, Third Party Advisory
- https://www.starwindsoftware.com/security/sw-20210325-0006/Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1888726Exploit, Issue Tracking, 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://lkml.org/lkml/2020/10/16/84Exploit, Mailing List, Third Party Advisory
- https://lkml.org/lkml/2020/10/29/528Mailing List, Patch, Third Party Advisory
- https://www.starwindsoftware.com/security/sw-20210325-0006/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.