DEBIAN-CVE-2026-40253
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-40253
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40253.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-40253
- Upstream
- Published
- 2026-04-16T23:16:33Z
- Modified
- 2026-09-14T17:03:10Z
- Severity
-
- 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
openCryptoki is a PKCS#11 library and provides tooling for Linux and AIX. In versions 3.26.0 and below, the BER/DER decoding functions in the shared common library (asn1.c) accept a raw pointer but no buffer length parameter, and trust attacker-controlled BER length fields without validating them against actual buffer boundaries. All primitive decoders are affected: ber_decode_INTEGER, ber_decode_SEQUENCE, ber_decode_OCTET_STRING, ber_decode_BIT_STRING, and ber_decode_CHOICE. Additionally, ber_decode_INTEGER can produce integer underflows when the encoded length is zero. An attacker supplying a malformed BER-encoded cryptographic object through PKCS#11 operations such as C_CreateObject or C_UnwrapKey, token loading from disk, or remote backend communication can trigger out-of-bounds reads. This affects all token backends (Soft, ICA, CCA, TPM, EP11, ICSF) since the vulnerable code is in the shared common library. A patch is available thorugh commit ed378f463ef73364c89feb0fc923f4dc867332a3.
- References
Affected packages
Debian:12 / opencryptoki
Package
- Name
- opencryptoki
- Purl
- pkg:deb/debian/opencryptoki?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:13 / opencryptoki
Package
- Name
- opencryptoki
- Purl
- pkg:deb/debian/opencryptoki?arch=source&distro=trixie
Debian:14 / opencryptoki
Package
- Name
- opencryptoki
- Purl
- pkg:deb/debian/opencryptoki?arch=source&distro=forky