Strix
64.1K

CVE-2026-90279

Unknown

Last modified

CVE-2026-90279 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: md/raid5: round bitmap stripes with sector division raid5_bitmap_sector_map() aligns the array range to full RAID5 stripe widths before converting it to component sectors. That width is chunk_sectors multiplied by the number of data disks, and it is not always a power of two. Reproduce with a 4-disk RAID5, 1024-sector chunks, and three data disks. The full-stripe width is 3072 sectors.

Description

In the Linux kernel, the following vulnerability has been resolved: md/raid5: round bitmap stripes with sector division raid5_bitmap_sector_map() aligns the array range to full RAID5 stripe widths before converting it to component sectors. That width is chunk_sectors multiplied by the number of data disks, and it is not always a power of two. Reproduce with a 4-disk RAID5, 1024-sector chunks, and three data disks. The full-stripe width is 3072 sectors. For a one-sector write at array sector 3072, correct rounding gives array range [3072, 6144), which maps to component range [1024, 2048). The old round_down()/round_up() logic instead gives [1024, 4096), which maps to [0, 1024). Use sector_div() based arithmetic so the rounded range is aligned to the actual RAID5 stripe width. The deterministic mapper test now reports the fixed component range as [1024, 2048), while the old mask-based range was [0, 1024).

Affected Software

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

VendorProductVersions
LinuxLinux>= b29e6400be51c214a0ad30dce937348b57abe33a, < 9d7490007707f90691911385365bd1d691d99225; >= aa8e15d69f5c0044d5bff61844e163aacc4ac172, < cab7d949b18b2f1cd625689dc16c5f81236bac93; >= 9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb, < 02c10581866d08822c6348e299881485fc546185; >= 9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb, < ccbdc483eb041eef809e9ff223d1ad63518a2c52; >= 9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb, < 17ea021ae74987d6064c8195c4922fa025753892; a41a0df5d7638acf15e723ad985980b4f7ff9383; >= 6.6.79, < 6.6.157; >= 6.12.13, < 6.12.110; >= 6.13.2, < 6.14
LinuxLinux6.14

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-90279?
In the Linux kernel, the following vulnerability has been resolved: md/raid5: round bitmap stripes with sector division raid5_bitmap_sector_map() aligns the array range to full RAID5 stripe widths before converting it to component sectors. That width is chunk_sectors multiplied by the number of data disks, and it is not always a power of two. Reproduce with a 4-disk RAID5, 1024-sector chunks, and three data disks. The full-stripe width is 3072 sectors. For a one-sector write at array sector 3072, correct rounding gives array range [3072, 6144), which maps to component range [1024, 2048). The old round_down()/round_up() logic instead gives [1024, 4096), which maps to [0, 1024). Use sector_div() based arithmetic so the rounded range is aligned to the actual RAID5 stripe width. The deterministic mapper test now reports the fixed component range as [1024, 2048), while the old mask-based range was [0, 1024).
How severe is CVE-2026-90279?
Severity scoring for CVE-2026-90279 is pending analysis.
How do I fix CVE-2026-90279?
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.

How Strix Helps

Related CVEs from 2026

View all 2026CVEs →

Are you affected by CVE-2026-90279?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST