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Red Hat: CVE-2024-42084: kernel: ftruncate: pass a signed offset (Multiple Advisories)

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Red Hat: CVE-2024-42084: kernel: ftruncate: pass a signed offset (Multiple Advisories)

Severity
6
CVSS
(AV:L/AC:H/Au:S/C:C/I:C/A:N)
Published
07/29/2024
Created
09/26/2024
Added
09/25/2024
Modified
09/25/2024

Description

In the Linux kernel, the following vulnerability has been resolved: ftruncate: pass a signed offset The old ftruncate() syscall, using the 32-bit off_t misses a sign extension when called in compat mode on 64-bit architectures. As a result, passing a negative length accidentally succeeds in truncating to file size between 2GiB and 4GiB. Changing the type of the compat syscall to the signed compat_off_t changes the behavior so it instead returns -EINVAL. The native entry point, the truncate() syscall and the corresponding loff_t based variants are all correct already and do not suffer from this mistake.

Solution(s)

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

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