CVE-2024-40977: wifi: mt76: mt7921s: fix potential hung tasks during chip recovery
CSIRTS triage
- What
- MT7921S WiFi driver can cause hung tasks during chip recovery due to improper task synchronization.
- Who is affected
- Systems running Linux kernel with MediaTek MT7921S WiFi adapter.
- Urgency
- Medium severity (CVSS 5.5) and not yet exploited; standard patching cycle appropriate.
- Action
- Apply kernel security patch addressing CVE-2024-40977.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-40977
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2024-409770.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 16% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2024-40977 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for wifi
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- highCVE-2026-64586: In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: drain bus_…nvd · 2026-08-06
- mediumCVE-2026-64586: wifi: brcmfmac: drain bus_reset work on device removalmsrc · 2026-08-06
- mediumCVE-2024-49937: wifi: cfg80211: Set correct chandef when starting CACmsrc · 2026-08-06
- mediumCVE-2025-71227: wifi: mac80211: don't WARN for connections on invalid channelsmsrc · 2026-08-06
- mediumCVE-2026-43172: wifi: iwlwifi: fix 22000 series SMEM parsingmsrc · 2026-08-06
- mediumCVE-2024-36922: wifi: iwlwifi: read txq->read_ptr under lockmsrc · 2026-08-06
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