CVE-2026-90356— wifi: mt76: mt7996: free vif links after clearing wcid entries on full reset
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： wifi: mt76: mt7996: 在完全重置时，于清除 WCID 条目之后释放 VIF 链路 函数会将非默认的 VIF（Virtual Interface，虚拟接口）链路加入队列，以便通过 进行延迟释放。然而，此时 数组仍持有指向嵌入在这些即将被释放的链路中的 WCID（Wireless Client Identifier，无线客户端标识符）结构的指针。随后， 会解引用这些条目，并调用 对其进行清理。如果在此过程中经过了一个宽限期（grace period），则清
Possible ATT&CK Techniques 1 AI
T1203 · Exploitation for Client ExecutionAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | ace5d3b6b49e8391beb4d7244348ba7da5298878< 2b10eb3636d0c4cb6b763e045ec1294dbd70f5ad |
affected |
ace5d3b6b49e8391beb4d7244348ba7da5298878< 8826d7a5e2dd727aa96456ccd58b33d2b080e935 |
affected | ||
ace5d3b6b49e8391beb4d7244348ba7da5298878< 7e4208e9f6a876c2b7d28fdb6b86dff3b05db2f7 |
affected | ||
6.18 |
affected | ||
< 6.18 |
unaffected | ||
6.18.52≤ 6.18.* |
unaffected | ||
7.2.6≤ 7.2.* |
unaffected | ||
7.3-rc1≤ * |
unaffected |
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I. Basic Information for CVE-2026-90356
Vulnerability Information
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Vulnerability Title
wifi: mt76: mt7996: free vif links after clearing wcid entries on full reset
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
wifi: mt76: mt7996: free vif links after clearing wcid entries on full reset
mt7996_mac_reset_vif_iter() queues non-default vif links for kfree_rcu
while dev->wcid[] still holds pointers to the wcid embedded in each
freed link; mt76_reset_device() then dereferences those entries and
runs mt76_wcid_cleanup() on them. If a grace period elapses in between,
the cleanup operates on freed memory.
Run mt76_reset_device() first, so the wcid entries are cleaned up and
cleared while the links are still valid.
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
II. Public POCs for CVE-2026-90356
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-90356 (3)
Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total
| 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-2026-90235 | 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-2026-90110 | 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-2026-90255 | 8.8 HIGH | Bluetooth: hci_conn: fix the SCO setup context lifetime |
| 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-2026-90367 | 8.8 HIGH | wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER |
| CVE-2026-90256 | 8.8 HIGH | Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind |
| CVE-2026-90371 | 8.8 HIGH | wifi: mt76: fix RXDMAD_C buffer recycling race |
| CVE-2026-93189 | 8.8 HIGH | HID: core: quiesce input in hid_hw_stop() to prevent use-after-free |
| 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-2026-90162 | 8.8 HIGH | ksmbd: defer publishing granted locks to prevent UAF/double-free race |
| CVE-2026-90286 | 8.8 HIGH | drm/amdgpu/gfx6: Use PFP on the compute queues too |
Showing top 20 of 600 CVEs. View all on vendor page → →
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Same vendor: Linux
-
CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
CVE-2026-98383
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
CVE-2026-98382
bpf: Reject dev-bound-only programs on other devices -
CVE-2026-98381
veth: manage XDP program pointers during channel resize -
CVE-2026-98380
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V. Comments for CVE-2026-90356
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