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CVE-2026-56099

OpenBSD mpls_do_error Kernel Stack Memory Disclosure via MPLS Input

OpenBSD before commit 6a23123 (2026-06-18) contains an out-of-bounds read vulnerability in the mpls_do_error function within sys/netmpls/mpls_input.c that allows remote attackers to disclose kernel stack memory by sending crafted MPLS frames with 16 labels and no Bottom-of-Stack bit set.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Openbsd
Products
Openbsd Src