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CVE-2026-90259

UnknownEPSS 0.21%

Last modified

CVE-2026-90259 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

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

EPSS Probability
0.21%

10.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= bc42bda22345efdb5d8b578d1b4df2c6eaa85c58, < 036e6c216be66a085da3a0519f1be5f3230b6e26; >= bc42bda22345efdb5d8b578d1b4df2c6eaa85c58, < 202ac9e469b78817512921c5db05cc2140e4ca43; >= bc42bda22345efdb5d8b578d1b4df2c6eaa85c58, < 34adc843c28e5cd1f533a1d64f51b0f756fdf945; >= bc42bda22345efdb5d8b578d1b4df2c6eaa85c58, < e6edde29990af8064b9d12217ec03db231ccd55d; >= bc42bda22345efdb5d8b578d1b4df2c6eaa85c58, < c4c136555ff90f1e2921cc42da43daac0ef9985e; >= bc42bda22345efdb5d8b578d1b4df2c6eaa85c58, < 9102b179512e11644fb0489ae62010a09afa199c
LinuxLinux4.13

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-90259?
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 severe is CVE-2026-90259?
Severity scoring for CVE-2026-90259 is pending analysis. The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.
How do I fix CVE-2026-90259?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST