CVE-2024-42084

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux3f6d078d4accfff8b114f968259a060bfdc7c682 < c329760749b5419769e57cb2be80955d2805f9c9affected
LinuxLinux3f6d078d4accfff8b114f968259a060bfdc7c682 < f531d4bc6c5588d713359e42ed65e46816d841d8affected
LinuxLinux3f6d078d4accfff8b114f968259a060bfdc7c682 < 84bf6b64a1a0dfc6de7e1b1c776d58d608e7865aaffected
LinuxLinux3f6d078d4accfff8b114f968259a060bfdc7c682 < dbb226d81cd02cee140139c2369791e6f61f2007affected
LinuxLinux3f6d078d4accfff8b114f968259a060bfdc7c682 < 5ae6af68410bdad6181ec82104bb9985a7a6a0faaffected
LinuxLinux3f6d078d4accfff8b114f968259a060bfdc7c682 < 836359247b0403e0634bfbc83e5bb8063fad287aaffected
LinuxLinux3f6d078d4accfff8b114f968259a060bfdc7c682 < 930a4c369f74da26816eaaa71b5888d29b759c27affected
LinuxLinux3f6d078d4accfff8b114f968259a060bfdc7c682 < 4b8e88e563b5f666446d002ad0dc1e6e8e7102b0affected
LinuxLinux3.9affected
LinuxLinux0 < 3.9unaffected
LinuxLinux4.19.317 <= 4.19.*unaffected
LinuxLinux5.4.279 <= 5.4.*unaffected
LinuxLinux5.10.221 <= 5.10.*unaffected
LinuxLinux5.15.162 <= 5.15.*unaffected
LinuxLinux6.1.97 <= 6.1.*unaffected
LinuxLinux6.6.37 <= 6.6.*unaffected
LinuxLinux6.9.8 <= 6.9.*unaffected
LinuxLinux6.10 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References