CVE-2026-90259: vulnerability in Linux
btrfs: qgroup: fix a wrong length calculation in qgroup_free_reserved_data()
Published
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 90% of all CVEs
observed exploitation
nono source reports it
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.
Affected products
Linux · LinuxRelated CVEs — Linux
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