CVEvulnerability
CVE-2022-39842
6.1 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2022-09-05
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.1 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
- Weaknesses
- CWE-190
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.
Affected configurations
• linux linux kernel (< 5.19)
• linux linux kernel 5.19
• debian debian linux 10.0
• debian debian linux 11.0
Related
Weakness · CWE (1)
- CWE-190 Integer Overflow or Wraparound weakness
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19 Release Notes, Vendor Advisory
- https://github.com/torvalds/linux/commit/a09d2d00af53b43c6f11e6ab3cb58443c2cac8a7 Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html Mailing List, Third Party Advisory
- https://lore.kernel.org/all/YylaC1wHHyLw22D3%40kadam/T/ lore.kernel.org
- https://www.debian.org/security/2022/dsa-5257 Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19 Release Notes, Vendor Advisory
- https://github.com/torvalds/linux/commit/a09d2d00af53b43c6f11e6ab3cb58443c2cac8a7 Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html Mailing List, Third Party Advisory
- https://lore.kernel.org/all/YylaC1wHHyLw22D3%40kadam/T/ lore.kernel.org
- https://www.debian.org/security/2022/dsa-5257 Third Party Advisory