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5.5

Azure kernel before 6.6.90.1-1 may cause system crash

published 2 years ago
Summary

Versions of the Azure Linux kernel older than 6.6.90.1-1 contain a coding error that can trigger a kernel panic, a sudden system freeze, when certain test code runs with memory safety checking enabled. This can lead to unexpected downtime. Upgrade the kernel to version 6.6.90.1-1 or later to resolve the problem.

What to do
  • Update azure kernel to version 6.6.90.1-1.
Affected software
Ecosystem VendorProductAffected versions
Azure Linux:3 azure kernel < 6.6.90.1-1
Fix: upgrade to 6.6.90.1-1
Original advisory text
CVE-2024-46823 affecting package kernel for versions less than 6.6.90.1-1
In the Linux kernel, the following vulnerability has been resolved:

kunit/overflow: Fix UB in overflow_allocation_test

The 'device_name' array doesn't exist out of the
'overflow_allocation_test' function scope. However, it is being used as
a driver name when calling 'kunit_driver_create' from
'kunit_device_register'. It produces the kernel panic with KASAN
enabled.

Since this variable is used in one place only, remove it and pass the
device name into kunit_device_register directly as an ascii string.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
5.5 Medium
Timeline
Published27 Sep 2024
Updated23 Sep 2026
First seen23 Sep 2026
Sources
AZL-53346 · OSV
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