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Ubuntu: USN-6739-1 (CVE-2021-46966): Linux kernel vulnerabilities

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Ubuntu: USN-6739-1 (CVE-2021-46966): Linux kernel vulnerabilities

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
02/27/2024
Created
04/22/2024
Added
04/22/2024
Modified
12/09/2024

Description

In the Linux kernel, the following vulnerability has been resolved: ACPI: custom_method: fix potential use-after-free issue In cm_write(), buf is always freed when reaching the end of the function. If the requested count is less than table.length, the allocated buffer will be freed but subsequent calls to cm_write() will still try to access it. Remove the unconditional kfree(buf) at the end of the function and set the buf to NULL in the -EINVAL error path to match the rest of function.

Solution(s)

  • ubuntu-upgrade-linux-image-4-4-0-1130-aws
  • ubuntu-upgrade-linux-image-4-4-0-1131-kvm
  • ubuntu-upgrade-linux-image-4-4-0-1168-aws
  • ubuntu-upgrade-linux-image-4-4-0-253-generic
  • ubuntu-upgrade-linux-image-4-4-0-253-lowlatency
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-lts-xenial
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-lts-xenial
  • ubuntu-upgrade-linux-image-virtual
  • ubuntu-upgrade-linux-image-virtual-lts-xenial

References

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