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CVE-2026-97516— wifi: rtw88: Add NULL check for chip->edcca_th in rtw_fw_adaptivity_result()

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: rtw88: 在 rtw_fw_adaptivity_result() 函数中为 chip->edcca_th 添加 NULL 检查 近期有报告指出，fw.c 文件中的 rtw_fw_adaptivity_result() 函数在解引用 rtwdev->chip->edcca_th 时未进行 NULL 检查。该问题的根源在于，使用 8821CE 芯片的设备在其芯片信息中未定义 edcca_th 字段。因此，当 rtw_fw_adaptivity_result

AI Predicted 4.7 Difficulty: Easy EPSS 0.16% · P4

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux fe7bc23a8c5eba8a49061c1d15d0a9d45ef18130< a8cdb18ef80d67790d8611ba94ae3d81901c9e04 affected
fe7bc23a8c5eba8a49061c1d15d0a9d45ef18130< 0b58a5ac9170a6f5e6425f8e1a4b3e1d9c2bf53d affected
fe7bc23a8c5eba8a49061c1d15d0a9d45ef18130< 6fa23cafaf30f4877e357f8eebcff00dff4aa9cb affected
fe7bc23a8c5eba8a49061c1d15d0a9d45ef18130< 1d1f250432cd8704c3c125168887f9724021c81a affected
fe7bc23a8c5eba8a49061c1d15d0a9d45ef18130< d5e6f353ce1e1c25b8458ea390ed09d2377412c5 affected
5.16 affected
< 5.16 unaffected
6.1.189≤ 6.1.* unaffected
… +4 more rows
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I. Basic Information for CVE-2026-97516

Vulnerability Information
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Vulnerability Title
wifi: rtw88: Add NULL check for chip->edcca_th in rtw_fw_adaptivity_result()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: rtw88: Add NULL check for chip->edcca_th in rtw_fw_adaptivity_result() It was recently reported that rtw_fw_adaptivity_result() in fw.c dereferences rtwdev->chip->edcca_th without a NULL check. The issue is that devices with the 8821CE chip don't define edcca_th in their chip info. As a result, when rtw_fw_adaptivity_result() tries to dereference it, the kernel triggers an oops. Add a NULL check for edcca_th before dereferencing it in rtw_fw_adaptivity_result() in fw.c. Placing the check at the function entry avoids logging any garbage values. This change does not address the root cause for this behavior, but it prevents the NULL dereference and the resulting oops while a more permanent solution is developed. Tested on a 8822CE chip which defines edcca_th, so this issue is not present on it, but it still uses this driver and I can verify there are no regressions.
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 fe7bc23a8c5eba8a49061c1d15d0a9d45ef18130 ~ a8cdb18ef80d67790d8611ba94ae3d81901c9e04 -
Linux Linux 5.16 -

II. Public POCs for CVE-2026-97516

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III. Intelligence Information for CVE-2026-97516

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Patches & Fixes for CVE-2026-97516 (5)

Same Patch Batch · Linux · 2026-09-24 · 234 CVEs total

CVE-2026-93207 9.8 CRITICAL SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry
CVE-2026-97413 9.8 CRITICAL RDMA/rtrs-srv: Fix integer underflow in process_read and process_write
CVE-2026-93228 9.1 CRITICAL svcrdma: Reject Write/Reply chunks with segcount 0
CVE-2026-93799 8.8 HIGH wifi: iwlwifi: mvm: validate sta_id in BA window status notif
CVE-2026-97442 8.8 HIGH wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi
CVE-2026-97409 8.8 HIGH nvme-fc: Do not cancel requests in io target before it is initialized
CVE-2026-93806 8.8 HIGH wifi: cfg80211: validate assoc response length before status and IE access
CVE-2026-93793 8.8 HIGH wifi: iwlwifi: mvm: validate TX_CMD response layout
CVE-2026-93790 8.8 HIGH wifi: iwlwifi: mvm: fix out-of-bounds tid_data access in BA notif
CVE-2026-93284 8.8 HIGH drm/pagemap: dma-unmap pages before handling migration errors
CVE-2026-93280 8.8 HIGH greybus: audio: bound the topology section sizes against the fetched size
CVE-2026-97509 8.8 HIGH thunderbolt: Keep XDomain reference during the lifetime of a service
CVE-2026-97451 8.4 HIGH ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)
CVE-2026-97455 8.4 HIGH ACPICA: Fix use-after-free in acpi_ds_terminate_control_method()
CVE-2026-93827 8.4 HIGH virtio-fs: avoid double-free on failed queue setup
CVE-2026-97452 8.4 HIGH ACPICA: Prevent adding invalid references
CVE-2026-97450 8.4 HIGH ACPICA: validate handler object type in two places
CVE-2026-97433 8.2 HIGH nvme: validate FDP configuration descriptor sizes
CVE-2026-93282 8.1 HIGH ksmbd: fix maximum allowed access checks
CVE-2026-93786 8.1 HIGH ksmbd: preserve VFS inherited POSIX ACL mask

Showing top 20 of 234 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-97516

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