Use After Free in Linux Kernel
CVE-2020-25656
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.
Vulnerability class: Use-After-Free
EPSS: 0.004 (35.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.1 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Linux Linux_kernel — versions 5.10
- Starwindsoftware Starwind_virtual_san — versions v8
- Debian Debian_linux — versions 9.0
- Redhat Enterprise_linux — versions 7.0, 8.0
- N/a Kernel — versions kernel 5.10-rc2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Exploit, Patch, Third Party Advisory, Issue Tracking)
- secalert@redhat.com (Patch, Mailing List, Third Party Advisory)
- secalert@redhat.com (Exploit, Mailing List, Third Party Advisory)
- secalert@redhat.com (mailing-list, Mailing List, Third Party Advisory)
- secalert@redhat.com (mailing-list, Mailing List, Third Party Advisory)
- secalert@redhat.com (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-25656?
- CVE-2020-25656 is a medium-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 4.1/10. Published 2020-12-02.
- How severe is CVE-2020-25656?
- Medium severity. CVSS v3 base score is 4.1 out of 10.
- Is CVE-2020-25656 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.