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CVE-2026-90262— btrfs: retry verity reads for not-uptodate Merkle folios

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，已解决以下漏洞： btrfs：针对“非最新（not-uptodate）”Merkle folio 重试 verity 读取 函数在页映射（mapping）中可能找到一个状态为“非最新（not-uptodate）”的 folio。在获取 folio 锁之后，当前代码将这种状态视为读取错误并返回 。 这可能导致先前的瞬时读取失败变为“粘滞（sticky）”状态。如果失败的读取在映射中留下了一个“非最新”的 folio，后续的调用者会找到该 folio 并直接失败，而不会重试读取。 本修复保留了现

AI Predicted 5.5 Difficulty: Moderate EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1562

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 06ed09351b67eb1114ae106a87a0ee3ea9adb3db< 90e9eae1b5907fa36620ffb7f4f1a4afa9333427 affected
06ed09351b67eb1114ae106a87a0ee3ea9adb3db< c1fa005cdf3b7ff14cdfd7d512830088a3fc256b affected
06ed09351b67eb1114ae106a87a0ee3ea9adb3db< 12b6d1a1715cbced2e445ca353f9c9987b8636e2 affected
06ed09351b67eb1114ae106a87a0ee3ea9adb3db< 81241f734f0f662378f5ffc53882b012923e6fe5 affected
06ed09351b67eb1114ae106a87a0ee3ea9adb3db< 8cc569696dac51fc62bb39b3b8f530582b916d29 affected
6.6 affected
< 6.6 unaffected
6.6.157≤ 6.6.* unaffected
… +4 more rows
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I. Basic Information for CVE-2026-90262

Vulnerability Information
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Vulnerability Title
btrfs: retry verity reads for not-uptodate Merkle folios
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: retry verity reads for not-uptodate Merkle folios btrfs_read_merkle_tree_page() can find a folio in the mapping that is not uptodate. After taking the folio lock, the current code treats that state as a read error and returns -EIO. That can make a previous transient read failure sticky. If the failed read left a not-uptodate folio in the mapping, later callers find that folio and fail instead of retrying the read. Keep the existing page-cache insertion and locking order, but retry the Merkle item read when a not-uptodate folio is found in the mapping. Also unlock the folio when read_key_bytes() fails so that a later caller can lock it and retry the read.
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 06ed09351b67eb1114ae106a87a0ee3ea9adb3db ~ 90e9eae1b5907fa36620ffb7f4f1a4afa9333427 -
Linux Linux 6.6 -

II. Public POCs for CVE-2026-90262

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III. Intelligence Information for CVE-2026-90262

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Patches & Fixes for CVE-2026-90262 (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-2026-90104 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-2026-90262

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