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
Affected Vendors & Products
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Linux
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Linux Kernel
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Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Fri, 30 Oct 2026 12:45:00 +0000
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Wed, 21 Oct 2026 13:15:00 +0000
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Sat, 19 Sep 2026 04:45:00 +0000
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| Weaknesses | CWE-122 CWE-190 |
Thu, 17 Sep 2026 16:30:00 +0000
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| 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. | |
| Title | btrfs: qgroup: fix a wrong length calculation in qgroup_free_reserved_data() | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
|
Projects
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MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-10-30T12:34:57.189Z
Reserved: 2026-09-11T19:38:34.796Z
Link: CVE-2026-90259
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-09-17T17:17:22.330
Modified: 2026-10-30T13:20:47.930
Link: CVE-2026-90259
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-09-19T08:30:16Z