CVE-2026-100073

CVE CVE-2026-100073EUVD EUVD-2026-87053Published 2026-09-25T13:06:46.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux 95ad8ee45cdbc321c135a2db895d48b374ef0f87 <46e8e31771f4f1c5e1cdec37a889a6730e42e9f1; 95ad8ee45cdbc321c135a2db895d48b374ef0f87 <a22464c5df5827e884a5a7d3d8fb03870e5bb6c8; 2b6d39229bc783198222cddd31e2fbded93c8db7; patch: 7.3-rc1; 6.16.3 <6.17; patch: 7.2.6; patch: 0; 6.17

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.