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Amazon Linux AMI: CVE-2023-4622: Security patch for kernel (ALAS-2023-1838)

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Amazon Linux AMI: CVE-2023-4622: Security patch for kernel (ALAS-2023-1838)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
09/06/2023
Created
10/11/2023
Added
10/07/2023
Modified
10/07/2023

Description

A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local privilege escalation.

The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that is being released by garbage collection, resulting in use-after-free.

We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c.

Solution(s)

  • amazon-linux-upgrade-kernel

References

  • ALAS-2023-1838
  • CVE-2023-4622

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