CVE-2026-90259
Description
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.
How to fix
- Linux Linux036e6c216be66a085da3a0519f1be5f3230b6e26, 202ac9e469b78817512921c5db05cc2140e4ca43, 34adc843c28e5cd1f533a1d64f51b0f756fdf945, e6edde29990af8064b9d12217ec03db231ccd55d, c4c136555ff90f1e2921cc42da43daac0ef9985e, 9102b179512e11644fb0489ae62010a09afa199c or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | bc42bda22345efdb5d8b578d1b4df2c6eaa85c58 ≤ v < 036e6c216be66a085da3a0519f1be5f3230b6e26, bc42bda22345efdb5d8b578d1b4df2c6eaa85c58 ≤ v < 202ac9e469b78817512921c5db05cc2140e4ca43, bc42bda22345efdb5d8b578d1b4df2c6eaa85c58 ≤ v < 34adc843c28e5cd1f533a1d64f51b0f756fdf945, bc42bda22345efdb5d8b578d1b4df2c6eaa85c58 ≤ v < e6edde29990af8064b9d12217ec03db231ccd55d, bc42bda22345efdb5d8b578d1b4df2c6eaa85c58 ≤ v < c4c136555ff90f1e2921cc42da43daac0ef9985e, bc42bda22345efdb5d8b578d1b4df2c6eaa85c58 ≤ v < 9102b179512e11644fb0489ae62010a09afa199c, 4.13 | 036e6c216be66a085da3a0519f1be5f3230b6e26, 202ac9e469b78817512921c5db05cc2140e4ca43, 34adc843c28e5cd1f533a1d64f51b0f756fdf945, e6edde29990af8064b9d12217ec03db231ccd55d, c4c136555ff90f1e2921cc42da43daac0ef9985e, 9102b179512e11644fb0489ae62010a09afa199c |
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