CVE-2026-46187 (GCVE-0-2026-46187)
Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-06-14 18:01
VLAI
EPSS
VEX
Title
wifi: rsi: fix kthread lifetime race between self-exit and external-stop
Summary
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.
Severity
4.7 (Medium)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
4c62764d0fc21a34ffc44eec1210038c3a2e4473 , < 4ac3095da22fc50e51ec10c3b8323c21ab3e441a
(git)
Affected: 4c62764d0fc21a34ffc44eec1210038c3a2e4473 , < 9dfe8a4458a063c6433526bc59112a169eee1aa3 (git) Affected: 4c62764d0fc21a34ffc44eec1210038c3a2e4473 , < 4f697813162d5f9151726a6d2bee82bffe4b0256 (git) Affected: 4c62764d0fc21a34ffc44eec1210038c3a2e4473 , < 95fcb436586dc3c2983537d557ac05bbc6a027f3 (git) Affected: 4c62764d0fc21a34ffc44eec1210038c3a2e4473 , < 16d9f674c619838bdeae42abc0929c9c5477ea1f (git) Affected: 4c62764d0fc21a34ffc44eec1210038c3a2e4473 , < 4f9a4ae8d2c198f01611ea376034c326ef43ab56 (git) Affected: 4c62764d0fc21a34ffc44eec1210038c3a2e4473 , < 4f4c9b13c485abd0a2d2c97f9db339d1dd8e147f (git) Affected: 4c62764d0fc21a34ffc44eec1210038c3a2e4473 , < db57a1aa54ff68669781976e4edb045e09e2b65b (git) Affected: d8f70ad66032363e3edceee81a7be2aaccb2d7f5 (git) Affected: ec759c0015fb7d4f5c7cb5711d2c8905724c7983 (git) Affected: c8ed05b1d8520f40395916438da9b38ce937a896 (git) Affected: ad78e2e057ab8d914a2b5e3e6acf29c3c8a428a3 (git) Affected: de1fd69b6541ff61177114d63af7ea719c426cf0 (git) Affected: 3.18.139 , < 3.19 (semver) Affected: 4.4.179 , < 4.5 (semver) Affected: 4.9.170 , < 4.10 (semver) Affected: 4.14.113 , < 4.15 (semver) Affected: 4.19.36 , < 4.20 (semver) |
guessed | |
| Linux | Linux |
Affected:
4.20
Unaffected: 0 , < 4.20 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.88 , ≤ 6.12.* (semver) Unaffected: 6.18.30 , ≤ 6.18.* (semver) Unaffected: 7.0.7 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rsi: fix kthread lifetime race between self-exit and external-stop\n\nRSI driver use both self-exit(kthread_complete_and_exit) and external-stop\n(kthread_stop) when killing a kthread. Generally, kthread_stop() is called\nfirst, and in this case, no particular issues occur.\n\nHowever, in rare instances where kthread_complete_and_exit() is called\nfirst and then kthread_stop() is called, a UAF occurs because the kthread\nobject, which has already exited and been freed, is accessed again.\n\nTherefore, to prevent this with minimal modification, you must remove\nkthread_stop() and change the code to wait until the self-exit operation\nis completed."
}
],
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{
"url": "https://git.kernel.org/stable/c/db57a1aa54ff68669781976e4edb045e09e2b65b"
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"datePublished": "2026-05-28T09:36:41.427Z",
"dateReserved": "2026-05-13T15:03:33.104Z",
"dateUpdated": "2026-06-14T18:01:14.431Z",
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"date": "2026-09-14",
"epss": "0.00093",
"percentile": "0.00641"
},
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"cve": "CVE-2026-46187",
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"source": "Microsoft CSAF VEX",
"status": "final",
"title": "wifi: rsi: fix kthread lifetime race between self-exit and external-stop",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-46187.json",
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Generally, kthread_stop() is called\\nfirst, and in this case, no particular issues occur.\\n\\nHowever, in rare instances where kthread_complete_and_exit() is called\\nfirst and then kthread_stop() is called, a UAF occurs because the kthread\\nobject, which has already exited and been freed, is accessed again.\\n\\nTherefore, to prevent this with minimal modification, you must remove\\nkthread_stop() and change the code to wait until the self-exit operation\\nis 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"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2026-06-28T07:41:23+00:00",
"cve": "CVE-2026-46187",
"id": "CVE-2026-46187",
"initial_release_date": "2026-05-28T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: wifi: rsi: fix kthread lifetime race between self-exit and external-stop",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46187.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-11T01:11:26Z",
"cve": "CVE-2026-46187",
"id": "CVE-2026-46187",
"initial_release_date": "2026-05-29T01:15:32Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "697",
"product_status:known_not_affected": "23",
"product_status:recommended": "254",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-46187",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46187.json",
"version": "11"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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