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.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= bc42bda22345efdb5d8b578d1b4df2c6eaa85c58, < 036e6c216be66a085da3a0519f1be5f3230b6e26; >= bc42bda22345efdb5d8b578d1b4df2c6eaa85c58, < 202ac9e469b78817512921c5db05cc2140e4ca43; >= bc42bda22345efdb5d8b578d1b4df2c6eaa85c58, < 34adc843c28e5cd1f533a1d64f51b0f756fdf945; >= bc42bda22345efdb5d8b578d1b4df2c6eaa85c58, < e6edde29990af8064b9d12217ec03db231ccd55d; >= bc42bda22345efdb5d8b578d1b4df2c6eaa85c58, < c4c136555ff90f1e2921cc42da43daac0ef9985e; >= bc42bda22345efdb5d8b578d1b4df2c6eaa85c58, < 9102b179512e11644fb0489ae62010a09afa199c |
| Linux | Linux | 4.13 |
References
- https://git.kernel.org/stable/c/036e6c216be66a085da3a0519f1be5f3230b6e26
- https://git.kernel.org/stable/c/202ac9e469b78817512921c5db05cc2140e4ca43
- https://git.kernel.org/stable/c/34adc843c28e5cd1f533a1d64f51b0f756fdf945
- https://git.kernel.org/stable/c/9102b179512e11644fb0489ae62010a09afa199c
- https://git.kernel.org/stable/c/c4c136555ff90f1e2921cc42da43daac0ef9985e
- https://git.kernel.org/stable/c/e6edde29990af8064b9d12217ec03db231ccd55d
Timeline
- Published
- Sep 17, 2026
- Last modified
- Oct 30, 2026
- NVD status
- Received