Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.10 |
| Redhat | Enterprise Linux | 7.0 |
| Debian | Debian Linux | 9.0 |
| Starwindsoftware | Starwind Virtual San | v8 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1888726ExploitIssue TrackingPatch
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00027.htmlMailing ListThird Party Advisory
- https://lkml.org/lkml/2020/10/16/84ExploitMailing ListThird Party Advisory
- https://lkml.org/lkml/2020/10/29/528Mailing ListPatchThird Party Advisory
- https://www.starwindsoftware.com/security/sw-20210325-0006/Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1888726ExploitIssue TrackingPatch
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00027.htmlMailing ListThird Party Advisory
- https://lkml.org/lkml/2020/10/16/84ExploitMailing ListThird Party Advisory
- https://lkml.org/lkml/2020/10/29/528Mailing ListPatchThird Party Advisory
- https://www.starwindsoftware.com/security/sw-20210325-0006/Third Party Advisory
FAQ
What is CVE-2020-25656?
CVE-2020-25656 is a vulnerability with a CVSS score of 4.1 (MEDIUM). 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 o...
How severe is CVE-2020-25656?
CVE-2020-25656 has been rated MEDIUM with a CVSS base score of 4.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-25656?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Redhat Enterprise Linux, Debian Debian Linux, Starwindsoftware Starwind Virtual San.