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CVE-2026-46187— wifi: rsi: fix kthread lifetime race between self-exit and external-stop

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.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于wifi rsi驱动中kthread生命周期竞争，当kthread_complete_and_exit先于kthread_stop调用时，可能导致释放后重用。

AI Predicted 6.8 Difficulty: Hard EPSS 0.09% · P1

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 28

VendorProduct Version RangeStatus
Linux Linux 4c62764d0fc21a34ffc44eec1210038c3a2e4473< 4ac3095da22fc50e51ec10c3b8323c21ab3e441a affected
4c62764d0fc21a34ffc44eec1210038c3a2e4473< 9dfe8a4458a063c6433526bc59112a169eee1aa3 affected
4c62764d0fc21a34ffc44eec1210038c3a2e4473< 4f697813162d5f9151726a6d2bee82bffe4b0256 affected
4c62764d0fc21a34ffc44eec1210038c3a2e4473< 95fcb436586dc3c2983537d557ac05bbc6a027f3 affected
4c62764d0fc21a34ffc44eec1210038c3a2e4473< 16d9f674c619838bdeae42abc0929c9c5477ea1f affected
4c62764d0fc21a34ffc44eec1210038c3a2e4473< 4f9a4ae8d2c198f01611ea376034c326ef43ab56 affected
4c62764d0fc21a34ffc44eec1210038c3a2e4473< 4f4c9b13c485abd0a2d2c97f9db339d1dd8e147f affected
4c62764d0fc21a34ffc44eec1210038c3a2e4473< db57a1aa54ff68669781976e4edb045e09e2b65b affected
… +20 more rows
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I. Basic Information for CVE-2026-46187

Vulnerability Information
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Vulnerability Title
wifi: rsi: fix kthread lifetime race between self-exit and external-stop
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: rsi: fix kthread lifetime race between self-exit and external-stop RSI driver use both self-exit(kthread_complete_and_exit) and external-stop (kthread_stop) when killing a kthread. Generally, kthread_stop() is called first, and in this case, no particular issues occur. However, in rare instances where kthread_complete_and_exit() is called first and then kthread_stop() is called, a UAF occurs because the kthread object, which has already exited and been freed, is accessed again. Therefore, to prevent this with minimal modification, you must remove kthread_stop() and change the code to wait until the self-exit operation is completed.
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
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于wifi rsi驱动中kthread生命周期竞争，当kthread_complete_and_exit先于kthread_stop调用时，可能导致释放后重用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 4c62764d0fc21a34ffc44eec1210038c3a2e4473 ~ 4ac3095da22fc50e51ec10c3b8323c21ab3e441a -
Linux Linux 4.20 -

II. Public POCs for CVE-2026-46187

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III. Intelligence Information for CVE-2026-46187

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Patches & Fixes for CVE-2026-46187 (7)

Same Patch Batch · Linux · 2026-05-28 · 135 CVEs total

CVE-2026-46135 9.8 CRITICAL nvmet-tcp: fix race between ICReq handling and queue teardown
CVE-2026-46195 9.8 CRITICAL smb: client: validate dacloffset before building DACL pointers
CVE-2026-46137 9.8 CRITICAL mptcp: pm: ADD_ADDR rtx: fix potential data-race
CVE-2026-46115 9.8 CRITICAL block: add pgmap check to biovec_phys_mergeable
CVE-2026-46155 9.1 CRITICAL smb/client: fix out-of-bounds read in smb2_compound_op()
CVE-2026-46119 9.1 CRITICAL libceph: Fix slab-out-of-bounds access in auth message processing
CVE-2026-46185 9.1 CRITICAL smb/client: fix out-of-bounds read in symlink_data()
CVE-2026-46212 8.8 HIGH batman-adv: bla: prevent use-after-free when deleting claims
CVE-2026-46174 8.8 HIGH x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
CVE-2026-46125 8.8 HIGH wifi: mac80211: remove station if connection prep fails
CVE-2026-46198 8.8 HIGH batman-adv: fix integer overflow on buff_pos
CVE-2026-46166 8.8 HIGH wifi: mac80211: use safe list iteration in radar detect work
CVE-2026-46152 8.8 HIGH wifi: mac80211: drop stray 'static' from fast-RX rx_result
CVE-2026-46238 8.8 HIGH batman-adv: stop caching unowned originator pointers in BAT IV
CVE-2026-46113 8.8 HIGH KVM: x86: Fix shadow paging use-after-free due to unexpected GFN
CVE-2026-46232 8.1 HIGH HID: playstation: Clamp num_touch_reports
CVE-2026-46138 8.1 HIGH Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt
CVE-2026-46157 7.8 HIGH ALSA: pcm: oss: Fix data race at accessing runtime.oss.trigger
CVE-2026-46210 7.8 HIGH media: iris: fix use-after-free of fmt_src during MBPF check
CVE-2026-46215 7.8 HIGH drm: Set old handle to NULL before prime swap in change_handle

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46187

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