CVE-2026-63831: mac802154: llsec: add skb_cow_data() before in-place crypto
CSIRTS triage
- What
- A vulnerability exists due to missing skb_cow_data() before in-place crypto operations.
- Who is affected
- Deployments using mac802154 are affected.
- Urgency
- Remediation is important to prevent potential exploitation in crypto operations.
- Action
- Update to the latest version to mitigate the issue.
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-2026-63831
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-2026-638310.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 16% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-63831 | coverage & exploitation status | NVD · CVE.org |
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