CVE-2026-56099OpenBSD mpls_do_error Kernel Stack Memory Disclosure via MPLS Input

Beschreibung

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.

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

Referenzen und Patches

• https://pop.argus-systems.ai/advisory/adv-040.html technical-descriptionexploitExploitPatch
• https://github.com/openbsd/src/commit/6a23123ec05f1eb29cfcaae0f3a468b2e1983cfd patchPatch
• https://www.vulncheck.com/advisories/openbsd-mpls-do-error-kernel-stack-memory-disclosure-via-mpls-input third-party-advisoryThird Party Advisory
• http://seclists.org/fulldisclosure/2026/Jun/17 ExploitMailing ListPatchThird Party Advisory
• http://www.openwall.com/lists/oss-security/2026/06/19/3 ExploitMailing ListPatchThird Party Advisory