CVE-2026-19577 Zephyr Project - Out of Bounds Read

Zephyr Project contains an out-of-bounds read vulnerability in net_route_ipv6_packet() caused by improper neighbor cache link-layer address validation, letting unauthenticated attackers on the same link cause denial of service or information disclosure, exploit requires attacker to send crafted packets to unresolved neighbors.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.22% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out of Bounds Read
Impact
Denial Of Service, Information Disclosure
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Published
11 October 2026
Updated
15 October 2026
Weakness
CWE-125

Vendor fix

Update to the latest Zephyr Project version with the fix applied.

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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