CVE search · CVE-2026-56099
CVE-2026-56099
medium 6.9
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.
Details
- Status
- Analyzed
- Published
- Last changed
- Source
- disclosure@vulncheck.com
- Weakness
- CWE-125
Severity
| Version | Score | Vector | Source |
|---|---|---|---|
| CVSS 4.0 | medium 6.9 | 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 |
disclosure@vulncheck.comSecondary |
| CVSS 3.1 | medium 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
disclosure@vulncheck.comSecondary |
| CVSS 3.1 | medium 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
nvd@nist.govPrimary |
Affected products
Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.
- openbsd · openbsd
References
- https://github.com/openbsd/src/commit/6a23123ec05f1eb29cfcaae0f3a468b2e1983cfdPatch
- https://pop.argus-systems.ai/advisory/adv-040.htmlExploitPatchThird Party Advisory
- https://www.vulncheck.com/advisories/openbsd-mpls-do-error-kernel-stack-memory-disclosure-via-mpls-inputThird Party Advisory
- http://seclists.org/fulldisclosure/2026/Jun/17ExploitMailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2026/06/19/3ExploitMailing ListPatchThird Party Advisory