Riskcovery

CVE-2024-42084

ftruncate: pass a signed offset

State
Published
Severity
Not scored
Published
Jul 29, 2024
Updated
May 11, 2026
Reserved
Jul 29, 2024

Read the record on cve.org

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 3f6d078d4accfff8b114f968259a060bfdc7c682 to before c329760749b5419769e57cb2be80955d2805f9c9Affected
  • 3f6d078d4accfff8b114f968259a060bfdc7c682 to before f531d4bc6c5588d713359e42ed65e46816d841d8Affected
  • 3f6d078d4accfff8b114f968259a060bfdc7c682 to before 84bf6b64a1a0dfc6de7e1b1c776d58d608e7865aAffected
  • 3f6d078d4accfff8b114f968259a060bfdc7c682 to before dbb226d81cd02cee140139c2369791e6f61f2007Affected
  • 3f6d078d4accfff8b114f968259a060bfdc7c682 to before 5ae6af68410bdad6181ec82104bb9985a7a6a0faAffected
  • 3f6d078d4accfff8b114f968259a060bfdc7c682 to before 836359247b0403e0634bfbc83e5bb8063fad287aAffected
  • 3f6d078d4accfff8b114f968259a060bfdc7c682 to before 930a4c369f74da26816eaaa71b5888d29b759c27Affected
  • 3f6d078d4accfff8b114f968259a060bfdc7c682 to before 4b8e88e563b5f666446d002ad0dc1e6e8e7102b0Affected
LinuxLinux
  • 3.9Affected
  • before 3.9Not affected
  • 4.19.317 through 4.19.*Not affected
  • 5.4.279 through 5.4.*Not affected
  • 5.10.221 through 5.10.*Not affected
  • 5.15.162 through 5.15.*Not affected
  • 6.1.97 through 6.1.*Not affected
  • 6.6.37 through 6.6.*Not affected
  • 6.9.8 through 6.9.*Not affected
  • 6.10 and laterNot affected

References

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