Use After Free The advisory has been revoked - it doesn't affect any version of package kernel (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-AMZN2-KERNEL-9299672
- published7 Mar 2025
- disclosed30 Jul 2024
Introduced: 30 Jul 2024
CVE-2024-42104 (opens in a new tab)Amendment
The Amazon-Linux security team deemed this advisory irrelevant for Amazon-Linux:2.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Amazon-Linux.
In the Linux kernel, the following vulnerability has been resolved:
nilfs2: add missing check for inode numbers on directory entries
Syzbot reported that mounting and unmounting a specific pattern of corrupted nilfs2 filesystem images causes a use-after-free of metadata file inodes, which triggers a kernel bug in lru_add_fn().
As Jan Kara pointed out, this is because the link count of a metadata file gets corrupted to 0, and nilfs_evict_inode(), which is called from iput(), tries to delete that inode (ifile inode in this case).
The inconsistency occurs because directories containing the inode numbers of these metadata files that should not be visible in the namespace are read without checking.
Fix this issue by treating the inode numbers of these internal files as errors in the sanity check helper when reading directory folios/pages.
Also thanks to Hillf Danton and Matthew Wilcox for their initial mm-layer analysis.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-42104
- https://git.kernel.org/stable/c/07c176e7acc5579c133bb923ab21316d192d0a95
- https://git.kernel.org/stable/c/1b7d549ed2c1fa202c751b69423a0d3a6bd5a180
- https://git.kernel.org/stable/c/265fff1a01cdc083aeaf0d934c929db5cc64aebf
- https://git.kernel.org/stable/c/2f2fa9cf7c3537958a82fbe8c8595a5eb0861ad7
- https://git.kernel.org/stable/c/3ab40870edb883b9633dc5cd55f5a2a11afa618d
- https://git.kernel.org/stable/c/b11e8fb93ea5eefb2e4e719497ea177a58ff6131
- https://git.kernel.org/stable/c/bb76c6c274683c8570ad788f79d4b875bde0e458
- https://git.kernel.org/stable/c/c33c2b0d92aa1c2262d999b2598ad6fbd53bd479