CVE-2026-19186 Zephyr IEEE802154 - Out-of-Bounds Read & Write

Zephyr subsys/net/l2/ieee802154 contains an out-of-bounds read and write caused by improper length validation in ieee802154_decipher_data_frame(), letting remote attackers cause memory corruption and denial of service by sending crafted short frames, exploit requires enabled CONFIG_NET_L2_IEEE802154_SECURITY with crypto device and active security session.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.21% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out-of-Bounds Read
Impact
Denial Of Service, Data Tampering
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Published
7 October 2026
Updated
15 October 2026
Weakness
CWE-191

Vendor fix

Update to a version that rejects frames shorter than ll_hdr_len + authtag_len and adds transmit side guards, or upgrade to the latest Zephyr version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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