CVE-2022-39842
Public on 2022-09-05
Modified on 2023-03-28
Description
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.
Severity
Medium
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 1 | N/A | Not Affected | ||
| Amazon Linux 2 - Core | N/A | Not Affected | ||
| Amazon Linux 2023 | N/A | Not Affected | ||
| Amazon Linux 1 | kernel | 2022-12-01 | ALAS-2022-1645 | Fixed |
| Amazon Linux 2 - Core | kernel | 2022-10-31 | ALAS2-2022-1876 | Fixed |
| Amazon Linux 2 - Kernel-5.10 Extra | kernel | 2022-10-17 | ALAS2KERNEL-5.10-2022-021 | Fixed |
| Amazon Linux 2 - Kernel-5.15 Extra | kernel | 2022-10-17 | ALAS2KERNEL-5.15-2022-009 | Fixed |
| Amazon Linux 2 - Kernel-5.4 Extra | kernel | 2022-10-17 | ALAS2KERNEL-5.4-2022-037 | Fixed |
| Amazon Linux 2023 | kernel | 2023-02-17 | ALAS2023-2023-070 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 6.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H |
| NVD | CVSSv3 | 6.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H |