Dashboard / CVE-2026-56099

CVE-2026-56099

MEDIUM
MEDIUM Priority: 0.03 BB Relevance: 74/100
Published: 2026-06-18 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: X
AT: None
VC: Low
VI: None
VA: None

Description

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
openbsd openbsd < 2026-06-18

References & Advisories (5)

https://pop.argus-systems.ai/advisory/adv-040.html
Exploit Patch Third Party Advisory

Bug Bounty Relevance

74 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

6.9 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.50%
Raw Score 0.005000
Percentile 42.8%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00500
2026-10-28
0.00500

Intelligence Sources

nvd ref →

External Links