CVE-2026-90418nilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch
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In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch Syzbot reported a kernel BUG triggered within nilfs_copy_dirty_pages(), which copies dirty DAT file folios/pages to its shadow page cache. The BUG occurs when a retrieved dirty folio/page unexpectedly loses its 'dirty' status. This issue arises because, since the commit referenced below, the 'dirty' flag of a folio/page can be cleared asynchronously after the filesystem detects metadata corruption and transitions to read-only mode. Resolve the issue by returning an -EROFS error if the filesystem has transitioned to read-only mode. Also change the behavior to issue a kernel warning only once instead of triggering a kernel BUG when this unexpected 'dirty' state is detected while the filesystem is not in read-only mode.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 8c26c4e2694a163d525976e804d81cd955bbb40c before 5166a21b12f549774f2983fa86d2526ea9e66ace; 8c26c4e2694a163d525976e804d81cd955bbb40c builds before 4e1f21e7540b25d83f86b50780836ed7d2afcc93; from 8c26c4e2694a163d525976e804d81cd955bbb40c before 3904fb0ee741ebbbc27ec8f50a9bb6cd31e8af05; from 8c26c4e2694a163d525976e804d81cd955bbb40c before f181155baf0c93a74ebe804c6cecbe970e78ee9e; from 8c26c4e2694a163d525976e804d81cd955bbb40c before 66f4ad3ce158902e5f98afea93189972ed8750c2 | CNA record |
References
- https://git.kernel.org/stable/c/5166a21b12f549774f2983fa86d2526ea9e66ace
- https://git.kernel.org/stable/c/4e1f21e7540b25d83f86b50780836ed7d2afcc93
- https://git.kernel.org/stable/c/3904fb0ee741ebbbc27ec8f50a9bb6cd31e8af05
- https://git.kernel.org/stable/c/f181155baf0c93a74ebe804c6cecbe970e78ee9e
- https://git.kernel.org/stable/c/66f4ad3ce158902e5f98afea93189972ed8750c2
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.