CVE-2026-100073ext4: fix transaction overflow during writeback
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: ext4: fix transaction overflow during writeback Commit 95ad8ee45cdb ("ext4: correct the reserved credits for extent conversion") was correct to note that we need to reserve enough credits for all extents possibly underlying a large folio. However it was too eager to reduce the number of reserved credits. Extent conversion may not only need to touch several leaf extent blocks, it may also need to split extents - for example a single large unwritten extent may need to be split into many small written ones in case of sparse folio dirtying. This can thus result not only in extent leaf modifications but also in a need to allocate new extent tree nodes. As a result the reserved transaction credits were not sufficient in some corner cases. Use ext4_meta_trans_blocks() for correct upper bound credit estimate.
- 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
- Undergoing Analysis
- Record last updated
- Sep 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 95ad8ee45cdbc321c135a2db895d48b374ef0f87 before a22464c5df5827e884a5a7d3d8fb03870e5bb6c8; 95ad8ee45cdbc321c135a2db895d48b374ef0f87 builds before 46e8e31771f4f1c5e1cdec37a889a6730e42e9f1; 2b6d39229bc783198222cddd31e2fbded93c8db7; from 6.16.3 before 6.17 | CNA record |
References
- https://git.kernel.org/stable/c/a22464c5df5827e884a5a7d3d8fb03870e5bb6c8
- https://git.kernel.org/stable/c/46e8e31771f4f1c5e1cdec37a889a6730e42e9f1
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.