CVE-2020-25656
kernel: use-after-free in read in vt_do_kdgkb_ioctl
Severity Score
4.1
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
2
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
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.
Se encontró un fallo en el kernel de Linux. Se encontró un uso de la memoria previamente liberada en la manera en que el subsistema de la consola estaba usando ioctls KDGKBSENT y KDSKBSENT. Un usuario local podría usar este fallo para obtener acceso a la memoria de lectura fuera de los límites. La mayor amenaza de esta vulnerabilidad es la confidencialidad de los datos
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2020-09-16 CVE Reserved
- 2020-12-02 CVE Published
- 2023-03-08 EPSS Updated
- 2024-08-04 CVE Updated
- 2024-08-04 First Exploit
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-416: Use After Free
CAPEC
References (7)
| URL | Tag | Source |
|---|---|---|
| https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html | Mailing List |
|
| https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html | Mailing List |
|
| https://www.starwindsoftware.com/security/sw-20210325-0006 | Third Party Advisory |
| URL | Date | SRC |
|---|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1888726 | 2024-08-04 | |
| https://lkml.org/lkml/2020/10/16/84 | 2024-08-04 |
| URL | Date | SRC |
|---|---|---|
| https://lkml.org/lkml/2020/10/29/528 | 2022-10-25 |
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2020-25656 | 2024-05-22 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 5.10 Search vendor "Linux" for product "Linux Kernel" and version " < 5.10" | - |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.10 Search vendor "Linux" for product "Linux Kernel" and version "5.10" | rc1 |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
| ||||||
| Starwindsoftware Search vendor "Starwindsoftware" | Starwind Virtual San Search vendor "Starwindsoftware" for product "Starwind Virtual San" | v8 Search vendor "Starwindsoftware" for product "Starwind Virtual San" and version "v8" | build12533, vsphere |
Affected
| ||||||
| Starwindsoftware Search vendor "Starwindsoftware" | Starwind Virtual San Search vendor "Starwindsoftware" for product "Starwind Virtual San" | v8 Search vendor "Starwindsoftware" for product "Starwind Virtual San" and version "v8" | build12658, vsphere |
Affected
| ||||||
| Starwindsoftware Search vendor "Starwindsoftware" | Starwind Virtual San Search vendor "Starwindsoftware" for product "Starwind Virtual San" | v8 Search vendor "Starwindsoftware" for product "Starwind Virtual San" and version "v8" | build12859, vsphere |
Affected
| ||||||
| Starwindsoftware Search vendor "Starwindsoftware" | Starwind Virtual San Search vendor "Starwindsoftware" for product "Starwind Virtual San" | v8 Search vendor "Starwindsoftware" for product "Starwind Virtual San" and version "v8" | build13170, vsphere |
Affected
| ||||||
| Starwindsoftware Search vendor "Starwindsoftware" | Starwind Virtual San Search vendor "Starwindsoftware" for product "Starwind Virtual San" | v8 Search vendor "Starwindsoftware" for product "Starwind Virtual San" and version "v8" | build13586, vsphere |
Affected
| ||||||
| Starwindsoftware Search vendor "Starwindsoftware" | Starwind Virtual San Search vendor "Starwindsoftware" for product "Starwind Virtual San" | v8 Search vendor "Starwindsoftware" for product "Starwind Virtual San" and version "v8" | build13861, vsphere |
Affected
| ||||||