// For flags

CVE-2021-33655

kernel: malicious data for FBIOPUT_VSCREENINFO ioctl may cause OOB write memory

Severity Score

6.7
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

When sending malicous data to kernel by ioctl cmd FBIOPUT_VSCREENINFO,kernel will write memory out of bounds.

Cuando son enviados datos maliciosos al kernel mediante ioctl cmd FBIOPUT_VSCREENINFO, el kernel escribirá memoria fuera de límites

An out-of-bounds write flaw was found in the Linux kernel’s framebuffer-based console driver functionality in the way a user triggers ioctl FBIOPUT_VSCREENINFO with malicious data. This flaw allows a local user to crash or potentially escalate their privileges on the system.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-05-28 CVE Reserved
  • 2022-07-18 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-787: Out-of-bounds Write
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
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Linux Kernel
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< 5.19
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-
Affected
Linux
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Linux Kernel
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5.19
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rc1
Affected
Linux
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Linux Kernel
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5.19
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rc2
Affected
Linux
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Linux Kernel
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5.19
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rc3
Affected
Linux
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Linux Kernel
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5.19
Search vendor "Linux" for product "Linux Kernel" and version "5.19"
rc4
Affected
Linux
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Linux Kernel
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5.19
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rc5
Affected
Debian
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Debian Linux
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10.0
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-
Affected
Debian
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Debian Linux
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11.0
Search vendor "Debian" for product "Debian Linux" and version "11.0"
-
Affected