CVE-2026-74667: net/packet: reset the MAC header on the packet-socket transmit path
CSIRTS triage
- What
- A vulnerability in the packet socket transmit path where the MAC header is not properly reset, potentially leaking header information.
- Who is affected
- Systems running affected Linux kernel versions transmitting packets via packet sockets.
- Urgency
- Medium priority; not exploited but can leak network header metadata across packets.
- Action
- Apply Linux kernel patch resetting the MAC header on packet-socket transmit path.
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-2026-74667
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-2026-746670.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 8% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-74667 | coverage & exploitation status | NVD · CVE.org |
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