CVE-2026-46187: wifi: rsi: fix kthread lifetime race between self-exit and external-stop
Vulnerability summary
CVE-2026-46187 is a medium (CVSS 4.7) vulnerability in linux. EPSS estimates a 0.10% chance of exploitation in the next 30 days, higher than 0.6% of scored vulnerabilities.
Not severe (CVSS 4.7, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 51 · Related 51Timeline
- 28-05-2026PublishedVulnerability first disclosed.
- 15-10-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated4.7MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated4.7MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.10%
Chance of exploitation in the next 30 days
Percentile
1%
Versus all other CVEs
30-day change
Decrease -0.02 pp
From 0.11% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu166 products
- linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136 | < 7.0.0-28.28
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64 | < 7.0.0-1009.9
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 4c62764d0fc21a34ffc44eec1210038c3a2e4473, < 4ac3095da22fc50e51ec10c3b8323c21ab3e441a | ≥ 4c62764d0fc21a34ffc44eec1210038c3a2e4473, < 9dfe8a4458a063c6433526bc59112a169eee1aa3 | ≥ 4c62764d0fc21a34ffc44eec1210038c3a2e4473, < 4f697813162d5f9151726a6d2bee82bffe4b0256 | ≥ 4c62764d0fc21a34ffc44eec1210038c3a2e4473, < 95fcb436586dc3c2983537d557ac05bbc6a027f3 | ≥ 4c62764d0fc21a34ffc44eec1210038c3a2e4473, < 16d9f674c619838bdeae42abc0929c9c5477ea1f | ≥ 4c62764d0fc21a34ffc44eec1210038c3a2e4473, < 4f9a4ae8d2c198f01611ea376034c326ef43ab56 | ≥ 4c62764d0fc21a34ffc44eec1210038c3a2e4473, < 4f4c9b13c485abd0a2d2c97f9db339d1dd8e147f | ≥ 4c62764d0fc21a34ffc44eec1210038c3a2e4473, < db57a1aa54ff68669781976e4edb045e09e2b65b | d8f70ad66032363e3edceee81a7be2aaccb2d7f5 | ec759c0015fb7d4f5c7cb5711d2c8905724c7983 | c8ed05b1d8520f40395916438da9b38ce937a896 | ad78e2e057ab8d914a2b5e3e6acf29c3c8a428a3 | de1fd69b6541ff61177114d63af7ea719c426cf0 | ≥ 3.18.139, < 3.19 | ≥ 4.4.179, < 4.5 | ≥ 4.9.170, < 4.10 | ≥ 4.14.113, < 4.15 | ≥ 4.19.36, < 4.20 | 4.20
- linux_kernel≥ 3.18.139, < 3.19 | ≥ 4.4.179, < 4.5 | ≥ 4.9.170, < 4.10 | ≥ 4.14.113, < 4.15 | ≥ 4.19.36, < 5.10.258 | ≥ 5.11, < 5.15.209 | ≥ 5.16, < 6.1.175 | ≥ 6.2, < 6.6.140 | ≥ 6.7, < 6.12.88 | ≥ 6.13, < 6.18.30 | ≥ 6.19, < 7.0.7 | 7.1:rc1 | 7.1:rc2
Debian1 product
- linux< 6.1.176-1 | < 6.12.88-1 | < 7.0.7-1
3 vendors · 169 products
