DEBIAN-CVE-2026-39853
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-39853
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39853.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-39853
- Upstream
- Published
- 2026-04-09T16:16:31Z
- Modified
- 2026-09-14T17:03:10Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
osslsigncode is a tool that implements Authenticode signing and timestamping. Prior to 2.12, A stack buffer overflow vulnerability exists in osslsigncode in several signature verification paths. During verification of a PKCS#7 signature, the code copies the digest value from a parsed SpcIndirectDataContent structure into a fixed-size stack buffer (mdbuf[EVP_MAX_MD_SIZE], 64 bytes) without validating that the source length fits within the destination buffer. This pattern is present in the verification handlers for PE, MSI, CAB, and script files. An attacker can craft a malicious signed file with an oversized digest field in SpcIndirectDataContent. When a user verifies such a file with osslsigncode verify, the unbounded memcpy can overflow the stack buffer and corrupt adjacent stack state. This vulnerability is fixed in 2.12.
- References
Affected packages
Debian:12 / osslsigncode
Package
- Name
- osslsigncode
- Purl
- pkg:deb/debian/osslsigncode?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:13 / osslsigncode
Package
- Name
- osslsigncode
- Purl
- pkg:deb/debian/osslsigncode?arch=source&distro=trixie
Debian:14 / osslsigncode
Package
- Name
- osslsigncode
- Purl
- pkg:deb/debian/osslsigncode?arch=source&distro=forky