CVE-2024-42084: ftruncate: pass a signed offset
First published: Mon Jul 29 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <4.19.317 | 4.19.317 |
| redhat/kernel | <5.4.279 | 5.4.279 |
| redhat/kernel | <5.10.221 | 5.10.221 |
| redhat/kernel | <5.15.162 | 5.15.162 |
| redhat/kernel | <6.1.97 | 6.1.97 |
| redhat/kernel | <6.6.37 | 6.6.37 |
| redhat/kernel | <6.9.8 | 6.9.8 |
| redhat/kernel | <6.10 | 6.10 |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.128-1 6.12.20-1 6.12.21-1 | |
| debian/linux-6.1 | 6.1.129-1~deb11u1 |
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Reference Links
- 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/linus/4b8e88e563b5f666446d002ad0dc1e6e8e7102b0
- https://security-tracker.debian.org/tracker/CVE-2024-42084
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-42084
- https://nvd.nist.gov/vuln/detail/CVE-2024-42084
- https://launchpad.net/bugs/cve/CVE-2024-42084
- https://ubuntu.com/security/CVE-2024-42084
- https://lore.kernel.org/linux-cve-announce/2024072942-CVE-2024-42084-9283@gregkh/T
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2301727
- https://access.redhat.com/errata/RHSA-2024:7001
- https://access.redhat.com/errata/RHSA-2024:7000
- https://access.redhat.com/errata/RHSA-2024:9315
- https://access.redhat.com/errata/RHSA-2025:3215
- https://bugzilla.redhat.com/show_bug.cgi?id=2300533
Frequently Asked Questions
What is the severity of CVE-2024-42084?
The severity of CVE-2024-42084 is classified as moderate.
How do I fix CVE-2024-42084?
To fix CVE-2024-42084, upgrade to the latest kernel versions provided by your distribution, such as 4.19.317 or later.
Which versions are affected by CVE-2024-42084?
Versions of the Linux kernel prior to 4.19.317, 5.4.279, 5.10.221, 5.15.162, 6.1.97, and others are affected by CVE-2024-42084.
Is CVE-2024-42084 specific to any architecture?
Yes, CVE-2024-42084 specifically impacts 64-bit architectures when operating in compatibility mode.
What impact does CVE-2024-42084 have on systems?
CVE-2024-42084 can lead to unintended behaviors when a negative length is passed to the ftruncate() syscall, potentially causing data corruption.
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