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CVE-2026-90418— nilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch

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： nilfs2: 修复 nilfs_copy_dirty_pages() 中的 BUG（脏状态不一致） Syzbot 报告了一个在 中触发的内核 BUG。该函数负责将脏的 DAT 文件 folio/页复制到其影子页缓存。当检索到的脏 folio/页意外失去其“脏”状态时，就会触发该 BUG。 此问题的原因在于：由于下文引用的提交（commit）之后，在内核检测到元数据损坏并切换为只读模式后，folio/页的“脏”标志可能会异步清除。 修复方案： 1. 如果文件系统已切换为

AI Predicted 5.5 Difficulty: Moderate EPSS 0.17% · P6

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 8c26c4e2694a163d525976e804d81cd955bbb40c< 5166a21b12f549774f2983fa86d2526ea9e66ace affected
8c26c4e2694a163d525976e804d81cd955bbb40c< 4e1f21e7540b25d83f86b50780836ed7d2afcc93 affected
8c26c4e2694a163d525976e804d81cd955bbb40c< 3904fb0ee741ebbbc27ec8f50a9bb6cd31e8af05 affected
8c26c4e2694a163d525976e804d81cd955bbb40c< f181155baf0c93a74ebe804c6cecbe970e78ee9e affected
8c26c4e2694a163d525976e804d81cd955bbb40c< 66f4ad3ce158902e5f98afea93189972ed8750c2 affected
3.10 affected
< 3.10 unaffected
6.6.157≤ 6.6.* unaffected
… +4 more rows
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I. Basic Information for CVE-2026-90418

Vulnerability Information
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Vulnerability Title
nilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch Syzbot reported a kernel BUG triggered within nilfs_copy_dirty_pages(), which copies dirty DAT file folios/pages to its shadow page cache. The BUG occurs when a retrieved dirty folio/page unexpectedly loses its 'dirty' status. This issue arises because, since the commit referenced below, the 'dirty' flag of a folio/page can be cleared asynchronously after the filesystem detects metadata corruption and transitions to read-only mode. Resolve the issue by returning an -EROFS error if the filesystem has transitioned to read-only mode. Also change the behavior to issue a kernel warning only once instead of triggering a kernel BUG when this unexpected 'dirty' state is detected while the filesystem is not in read-only mode.
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 8c26c4e2694a163d525976e804d81cd955bbb40c ~ 5166a21b12f549774f2983fa86d2526ea9e66ace -
Linux Linux 3.10 -

II. Public POCs for CVE-2026-90418

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III. Intelligence Information for CVE-2026-90418

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Patches & Fixes for CVE-2026-90418 (5)

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-2026-90235 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-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
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-2026-90367 8.8 HIGH wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-93189 8.8 HIGH HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
CVE-2026-90240 8.8 HIGH iommu/vt-d: Flush context cache with correct SID when tearing down aliases
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-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90380 8.8 HIGH wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete
CVE-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
CVE-2026-90425 8.8 HIGH iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID

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-2026-90418

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