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CVE-2026-90279— md/raid5: round bitmap stripes with sector division

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： md/raid5: 按扇区除法对位图条带进行取整 函数在将阵列范围转换为组件扇区之前，会先将该范围对齐到完整的 RAID5 条带宽度。该宽度等于“chunk 扇区数 × 数据磁盘数量”，且不一定是 2 的幂。 复现场景： 使用一个由 4 块磁盘组成的 RAID5 阵列，chunk 大小为 1024 扇区，其中 3 块为数据磁盘。此时完整条带宽度为 3072 扇区（1024 × 3）。 对于位于阵列扇区 3072 处的 1 扇区写入操作： 正确的取整结果：阵列范围应为 [

AI Predicted 7.1 Difficulty: Hard EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux b29e6400be51c214a0ad30dce937348b57abe33a< 9d7490007707f90691911385365bd1d691d99225 affected
aa8e15d69f5c0044d5bff61844e163aacc4ac172< cab7d949b18b2f1cd625689dc16c5f81236bac93 affected
9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb< 02c10581866d08822c6348e299881485fc546185 affected
9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb< ccbdc483eb041eef809e9ff223d1ad63518a2c52 affected
9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb< 17ea021ae74987d6064c8195c4922fa025753892 affected
a41a0df5d7638acf15e723ad985980b4f7ff9383 affected
6.6.79< 6.6.157 affected
6.12.13< 6.12.110 affected
… +8 more rows
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I. Basic Information for CVE-2026-90279

Vulnerability Information
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Vulnerability Title
md/raid5: round bitmap stripes with sector division
Source: CVE Program / CVE List V5
Vulnerability 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).
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux b29e6400be51c214a0ad30dce937348b57abe33a ~ 9d7490007707f90691911385365bd1d691d99225 -
Linux Linux 6.14 -

II. Public POCs for CVE-2026-90279

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III. Intelligence Information for CVE-2026-90279

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Patches & Fixes for CVE-2026-90279 (4)

Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total

CVE-2026-92489 9.8 CRITICAL xfrm: Fix skb double-free in xfrm_dev_direct_output()
CVE-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
CVE-2026-90110 9.4 CRITICAL inetpeer: randomize RB-tree node comparison using SipHash
CVE-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90230 9.1 CRITICAL nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90286 8.8 HIGH drm/amdgpu/gfx6: Use PFP on the compute queues too
CVE-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
CVE-2026-90380 8.8 HIGH wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-90162 8.8 HIGH ksmbd: defer publishing granted locks to prevent UAF/double-free race
CVE-2026-90379 8.8 HIGH wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash
CVE-2026-90367 8.8 HIGH wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90371 8.8 HIGH wifi: mt76: fix RXDMAD_C buffer recycling race

Showing top 20 of 600 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-90279

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