CVE-2022-39842
high
CVSS v3
—
CVSS v2
—
VIR risk
8.0
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. NOTE: the original discoverer disputes that the overflow can actually happen.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2022-39842
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2022-39842.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 6.2-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 5.19.6-1 |
| debian | bullseye | fixed | 5.10.149-1 |
| debian | forky | fixed | 5.19.6-1 |
| debian | sid | fixed | 5.19.6-1 |
| debian | trixie | fixed | 5.19.6-1 |
References
Verify integrity in audit chain (admin only). AS-IS.