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CVE-2026-90221— nfc: nci: fix use of uninitialized memory in CORE_INIT_RSP parsing

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： nfc: nci: 修复 CORE_INIT_RSP 解析中未初始化内存的使用问题 和 在解析 数据包时，未验证 skb 中是否包含足够的数据。一个格式错误的响应（例如通过 注入的响应）可能声明了较大的 值，但提供的数据量不足，从而导致读取未初始化的 slab 内存。该值随后在 中被使用，从而触发了 KMSAN 未初始化值（uninit-value）警告。 在访问数据包字段之前添加了 skb 长度检查： 验证 skb 至少包含 1 字节用于状态字段。 在解析前验证 sk

AI Predicted 5.5 Difficulty: Moderate EPSS 0.21% · P11

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux bcd684aace34fedbd473fbd9b21ed06b0c2d2212< baed3fdf6ed2195c56f25ae18a086b938dcd3983 affected
bcd684aace34fedbd473fbd9b21ed06b0c2d2212< 2f434478771a4ebdd535033561c0590bcde39753 affected
bcd684aace34fedbd473fbd9b21ed06b0c2d2212< 5487f04c1ccbfa15aa6e531eb1ec9c9ec9c7bf31 affected
bcd684aace34fedbd473fbd9b21ed06b0c2d2212< bbe68e8249e2c76d65adfd9224fa95f1ca0fbe4e affected
bcd684aace34fedbd473fbd9b21ed06b0c2d2212< 4f0483bbcdaccc9d4aee30df7351863334cecfa7 affected
bcd684aace34fedbd473fbd9b21ed06b0c2d2212< 7d44b897bff84edcd4814899314d661ad4956a8e affected
bcd684aace34fedbd473fbd9b21ed06b0c2d2212< d56575a2595ee1f597f39e8a1cfb67ed3501678d affected
5.11 affected
… +8 more rows
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I. Basic Information for CVE-2026-90221

Vulnerability Information
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Vulnerability Title
nfc: nci: fix use of uninitialized memory in CORE_INIT_RSP parsing
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nfc: nci: fix use of uninitialized memory in CORE_INIT_RSP parsing nci_core_init_rsp_packet_v1() and nci_core_init_rsp_packet_v2() parse the CORE_INIT_RSP packet without validating that the skb contains enough data. A malformed response (e.g. injected via virtual_ncidev) can declare a large num_supported_rf_interfaces while providing insufficient data, causing reads of uninitialized slab memory. This is later used in nci_init_complete_req(), triggering a KMSAN uninit-value warning. Add skb length checks before accessing packet fields: - Validate the skb has at least 1 byte for the status field. - Validate the skb can hold the fixed-size header before parsing. - In v2, bounds-check each variable-length rf_interface entry and its extension parameters within the parsing loop. - In v1, verify the skb is large enough for both the variable-length rf_interfaces array and the trailing rsp_2 structure.
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 bcd684aace34fedbd473fbd9b21ed06b0c2d2212 ~ baed3fdf6ed2195c56f25ae18a086b938dcd3983 -
Linux Linux 5.11 -

II. Public POCs for CVE-2026-90221

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III. Intelligence Information for CVE-2026-90221

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Patches & Fixes for CVE-2026-90221 (7)

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-2026-90221

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