CVE-2024-42084

MEDIUM
Published Jul 29, 2024 Modified Nov 3, 2025

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.

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CVSS v3.1 Score

5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/4b8e88e563b5f666446d002ad0dc1e6e8e7102b0 https://git.kernel.org/stable/c/5ae6af68410bdad6181ec82104bb9985a7a6a0fa https://git.kernel.org/stable/c/836359247b0403e0634bfbc83e5bb8063fad287a https://git.kernel.org/stable/c/84bf6b64a1a0dfc6de7e1b1c776d58d608e7865a https://git.kernel.org/stable/c/930a4c369f74da26816eaaa71b5888d29b759c27 https://git.kernel.org/stable/c/c329760749b5419769e57cb2be80955d2805f9c9 https://git.kernel.org/stable/c/dbb226d81cd02cee140139c2369791e6f61f2007 https://git.kernel.org/stable/c/f531d4bc6c5588d713359e42ed65e46816d841d8 https://git.kernel.org/stable/c/4b8e88e563b5f666446d002ad0dc1e6e8e7102b0 https://git.kernel.org/stable/c/5ae6af68410bdad6181ec82104bb9985a7a6a0fa https://git.kernel.org/stable/c/836359247b0403e0634bfbc83e5bb8063fad287a https://git.kernel.org/stable/c/84bf6b64a1a0dfc6de7e1b1c776d58d608e7865a https://git.kernel.org/stable/c/930a4c369f74da26816eaaa71b5888d29b759c27 https://git.kernel.org/stable/c/c329760749b5419769e57cb2be80955d2805f9c9 https://git.kernel.org/stable/c/dbb226d81cd02cee140139c2369791e6f61f2007 https://git.kernel.org/stable/c/f531d4bc6c5588d713359e42ed65e46816d841d8

Frequently Asked Questions

What is CVE-2024-42084? +
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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).
How severe is CVE-2024-42084? +
CVE-2024-42084 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2024-42084? +
CVE-2024-42084 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-42084? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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