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Red Hat: CVE-2021-47289: kernel: ACPI: fix NULL pointer dereference (Multiple Advisories)

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Red Hat: CVE-2021-47289: kernel: ACPI: fix NULL pointer dereference (Multiple Advisories)

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
05/21/2024
Created
09/26/2024
Added
09/25/2024
Modified
09/25/2024

Description

In the Linux kernel, the following vulnerability has been resolved: ACPI: fix NULL pointer dereference Commit 71f642833284 ("ACPI: utils: Fix reference counting in for_each_acpi_dev_match()") started doing "acpi_dev_put()" on a pointer that was possibly NULL. That fails miserably, because that helper inline function is not set up to handle that case. Just make acpi_dev_put() silently accept a NULL pointer, rather than calling down to put_device() with an invalid offset off that NULL pointer.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

References

  • CVE-2021-47289
  • RHSA-2024:7000
  • RHSA-2024:7001

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