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CVE-2026-90407— wifi: ath11k: fix overreads in ath11k_wmi_process_csa_switch_count_event()

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: ath11k: 修复 中的越界读取问题 由于 缺少对应的策略条目（policy entry），解析基础设施未对该事件结构体强制执行最小长度检查。此外， 字段直接取自固件，并在未验证其是否超出 TLV 载荷范围的条件下，被用作遍历 数组的循环边界。上述任一情况均可能导致越界读取（out-of-bounds read）。 修复措施： 1. 为 添加 TLV 策略条目，使解析基础设施对固定大小的事件结构体强制执行最小长度要求。 2. 添加辅助函数 ，用于从 TLV

CVSS 7.7 · High EPSS 0.19% · P8

Possible ATT&CK Techniques 2 AI

T1065 T1201 · Password Policy Discovery

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux d5c65159f2895379e11ca13f62feabe93278985d< f760b7d7e43584d2fa9bffcec1a04e502609f827 affected
d5c65159f2895379e11ca13f62feabe93278985d< d6625dc5f1fe42cd81b8c57a1f5317afb9b410ce affected
d5c65159f2895379e11ca13f62feabe93278985d< 0364926fb4bfb5b798e5fe2785b3023b4f767327 affected
d5c65159f2895379e11ca13f62feabe93278985d< 5de2b8c53714ad58f2fda118cd29ebbe31b38665 affected
d5c65159f2895379e11ca13f62feabe93278985d< 208d7fdb85976a737a715b81d54efaff6703880c affected
5.6 affected
< 5.6 unaffected
6.6.157≤ 6.6.* unaffected
… +4 more rows
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I. Basic Information for CVE-2026-90407

Vulnerability Information
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Vulnerability Title
wifi: ath11k: fix overreads in ath11k_wmi_process_csa_switch_count_event()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: fix overreads in ath11k_wmi_process_csa_switch_count_event() There is no policy entry for WMI_TAG_PDEV_CSA_SWITCH_COUNT_STATUS_EVENT, so the parse infrastructure does not enforce a minimum length for the event struct. Additionally, the num_vdevs field is taken directly from firmware and used as a loop bound over the vdev_ids array without checking that it fits within the TLV payload. Either condition can cause an out-of-bounds read. Add a TLV policy entry for WMI_TAG_PDEV_CSA_SWITCH_COUNT_STATUS_EVENT so the parse infrastructure enforces a minimum length for the fixed-size event struct. Add a helper ath11k_wmi_tlv_data_len() to recover the payload length of a parsed TLV from the header preceding its data pointer. Use it in ath11k_wmi_process_csa_switch_count_event() to bound num_vdevs before the loop. Compile tested only.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
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 d5c65159f2895379e11ca13f62feabe93278985d ~ f760b7d7e43584d2fa9bffcec1a04e502609f827 -
Linux Linux 5.6 -

II. Public POCs for CVE-2026-90407

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III. Intelligence Information for CVE-2026-90407

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Patches & Fixes for CVE-2026-90407 (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-2026-90413 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-2026-90367 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-2026-90381 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-2026-90371 8.8 HIGH wifi: mt76: fix RXDMAD_C buffer recycling race
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

V. Comments for CVE-2026-90407

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