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Amazon Linux AMI: CVE-2022-39842: Security patch for kernel (ALAS-2022-1645)

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Amazon Linux AMI: CVE-2022-39842: Security patch for kernel (ALAS-2022-1645)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
09/05/2022
Created
12/12/2022
Added
12/10/2022
Modified
05/24/2024

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.

Solution(s)

  • amazon-linux-upgrade-kernel

References

  • ALAS-2022-1645
  • CVE-2022-39842
  • USN-5791-1
  • USN-5791-2
  • USN-5791-3
  • USN-5792-1
  • USN-5792-2
  • USN-5815-1
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