DEBIAN-CVE-2026-109399
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-109399
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-109399.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-109399
- Upstream
- Published
- 2026-10-12T16:17:05Z
- Modified
- 2026-10-27T02:00:08Z
- Severity
-
- 9.2 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/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 CVSS Calculator
- Summary
- [none]
- Details
-
SWUpdate through 2026.05.1 contains an improper certificate validation vulnerability in crypto/swupdate_cms_verify_openssl.c that trusts untrusted X.509 certificates embedded in CMS SignedData for chain building. Attackers holding a signing key from a sibling intermediate under the same root can embed that intermediate in the signature to install malicious updates.
- References
Affected packages
Debian:12 / swupdate
Package
- Name
- swupdate
- Purl
- pkg:deb/debian/swupdate?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affectedFixed2022.12+dfsg-4+deb12u3
Debian:14 / swupdate
Package
- Name
- swupdate
- Purl
- pkg:deb/debian/swupdate?arch=source&distro=forky
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affectedFixed2026.05+dfsg-1
Affected versions
2024.*
2024.12.1+dfsg-3
2025.*
2025.05+dfsg-1
2025.05+dfsg-2~bpo13+1
2025.05+dfsg-2
2025.05+dfsg-3~bpo13+1
2025.05+dfsg-3
2025.12+dfsg-1
2025.12+dfsg-2~bpo13+1
2025.12+dfsg-2
2025.12+dfsg-3
2025.12+dfsg-4
2025.12+dfsg-5
2025.12+dfsg-6
2025.12+dfsg-7~bpo13+1
2025.12+dfsg-7
2025.12+dfsg-8
2025.12+dfsg-9
2025.12+dfsg-10~bpo13+1
2025.12+dfsg-10~bpo13+2
2025.12+dfsg-10