CVE-2026-90259

CVE CVE-2026-90259EUVD EUVD-2026-81852Published 2026-09-17T16:07:57.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: btrfs: qgroup: fix a wrong length calculation in qgroup_free_reserved_data() In that function, we round down the start position and round up the ending position. But during the calculation of @len, we use "round_up(start + len, sectorsize)", which is the rounded up end position, not the rounded up length. Which results a much larger length, and later we are still using "start + len", which is completely incorrect. Fix it by declaring a local @aligned_start and @aligned_len and use them instead.

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 patch: 7.3-rc1; patch: 6.18.52; bc42bda22345efdb5d8b578d1b4df2c6eaa85c58 <e6edde29990af8064b9d12217ec03db231ccd55d; patch: 0; 4.13; bc42bda22345efdb5d8b578d1b4df2c6eaa85c58 <c4c136555ff90f1e2921cc42da43daac0ef9985e; bc42bda22345efdb5d8b578d1b4df2c6eaa85c58 <9102b179512e11644fb0489ae62010a09afa199c; patch: 7.2.6

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.