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CVE-2022-39842
Good to know:
Date: September 5, 2022
** DISPUTED ** An issue was discovered in the Linux kernel before 5.19. In pxa3xx_gcu_write in drivers/video/fbdev/pxa3xx-gcu.c, the count parameter has a type conflict of size_t versus int, causing an integer overflow and bypassing the size check. After that, because it is used as the third argument to copy_from_user(), a heap overflow may occur. NOTE: the original discoverer disputes that the overflow can actually happen.
Language: C
Severity Score
Related Resources (10)
Severity Score
Weakness Type (CWE)
Integer Overflow or Wraparound
CWE-190Top Fix
Upgrade Version
Upgrade to version v4.9.330,v4.14.295,v4.19.260,v5.4.215,v5.10.145,v5.15.70
CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | LOCAL |
| Attack Complexity (AC): | LOW |
| Privileges Required (PR): | LOW |
| User Interaction (UI): | NONE |
| Scope (S): | UNCHANGED |
| Confidentiality (C): | NONE |
| Integrity (I): | LOW |
| Availability (A): | HIGH |