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CVE-2026-90216— ubi: Fix rollback for explicit UBI device numbers

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： UBI：修复显式 UBI 设备号下的回滚逻辑 在回滚模块初始化失败时，会扫描 ，其中 是 参数的索引。该逻辑假设参数索引与 UBI 设备号一致。 然而，当 指定了显式的 时，上述假设并不成立。成功挂载的设备可能被存储在一个较高的 槽位中，导致后续失败时的回滚过程未能检测到该设备。 因此，修复方案是：扫描完整的 数组，并根据实际的数组索引执行卸载操作，以与 UBI 设备在数组中的存储方式保持一致。

AI Predicted 5.5 Difficulty: Hard EPSS 0.22% · P11

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 83ff59a066637a6c28844bbf43009459408240f4< 83c978921688af40dcab6db74882d1ff9b0b765c affected
83ff59a066637a6c28844bbf43009459408240f4< 6b92e66ec6dd8019e8efb2a568ef7c967c5a18c5 affected
83ff59a066637a6c28844bbf43009459408240f4< 4417ab6ecad01cf2d01045ef8104c95a66b0e893 affected
83ff59a066637a6c28844bbf43009459408240f4< 552e565ed8846e7db143e4a6bdf3f5677453c686 affected
83ff59a066637a6c28844bbf43009459408240f4< 9754f049d5f1945d4c691d1f52824eb8daf8f9be affected
83ff59a066637a6c28844bbf43009459408240f4< e3f7e58189bc222971ddc860f1716f37e51ba996 affected
83ff59a066637a6c28844bbf43009459408240f4< 87b3da4acb860605643ebee312178f13b20744cf affected
83ff59a066637a6c28844bbf43009459408240f4< 5b0a6b554e12a97f9771a9a9f4ea1f5457373c73 affected
… +10 more rows
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I. Basic Information for CVE-2026-90216

Vulnerability Information
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Vulnerability Title
ubi: Fix rollback for explicit UBI device numbers
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ubi: Fix rollback for explicit UBI device numbers ubi_init_attach() rolls back module initialization failures by scanning ubi_devices[0..i-1], where i is the mtd= parameter index. That assumes the parameter index matches the UBI device number. That assumption is not true when mtd= specifies an explicit ubi_num. A successfully attached device can be stored at a higher ubi_devices[] slot, and a later failure can miss it during rollback. Scan the full ubi_devices[] array and detach by the actual array index, matching the way UBI devices are stored.
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 83ff59a066637a6c28844bbf43009459408240f4 ~ 83c978921688af40dcab6db74882d1ff9b0b765c -
Linux Linux 3.11 -

II. Public POCs for CVE-2026-90216

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III. Intelligence Information for CVE-2026-90216

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Patches & Fixes for CVE-2026-90216 (7)

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

CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
CVE-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-92489 9.8 CRITICAL xfrm: Fix skb double-free in xfrm_dev_direct_output()
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-2026-90230 9.1 CRITICAL nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
CVE-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-90380 8.8 HIGH wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-90425 8.8 HIGH iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID
CVE-2026-90240 8.8 HIGH iommu/vt-d: Flush context cache with correct SID when tearing down aliases
CVE-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90379 8.8 HIGH wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash
CVE-2026-90162 8.8 HIGH ksmbd: defer publishing granted locks to prevent UAF/double-free race
CVE-2026-93189 8.8 HIGH HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
CVE-2026-90255 8.8 HIGH Bluetooth: hci_conn: fix the SCO setup context lifetime

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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