ubuntu-cve-2026-13505
Vulnerability from osv_ubuntu
Published
2026-08-08 02:17
Modified
2026-08-13 00:02
Summary
Details
In Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series), sensitive key material held by the AES and DESede engines, the SP 800-90A DRBGs, SymmetricSecretKey and the PBKD and scrypt parameter classes was zeroised on garbage collection by overriding Object.finalize. Finalization runs at an unspecified time and in an unspecified order and is serviced by a single finalizer thread, so where objects carrying a finalizer are allocated faster than that thread retires them the pending-finalization queue grows without bound: disposal falls arbitrarily far behind, which can contribute to an OutOfMemoryError under load, and the key material those objects hold stays resident in the heap for as long as they are queued, defeating the purpose of the zeroisation. The behaviour was not a problem on Java 8 or Java 11; it is later JVMs, on which finalization has been deprecated and progressively de-emphasised, where it becomes one. Disposal of these classes now runs from a java.lang.ref.Cleaner registered in the multi-release jdk1.9 overlay, so on Java 9 and later it no longer depends on the finalizer being scheduled. Bouncy Castle for Java (bcprov) and Bouncy Castle for Java LTS are not affected, as neither implements the finalizer-based zeroisation scheme.
Severity
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libbcmail-java",
"binary_version": "1.51-4ubuntu1+esm1"
},
{
"binary_name": "libbcpg-java",
"binary_version": "1.51-4ubuntu1+esm1"
},
{
"binary_name": "libbcpkix-java",
"binary_version": "1.51-4ubuntu1+esm1"
},
{
"binary_name": "libbcprov-java",
"binary_version": "1.51-4ubuntu1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "bouncycastle",
"purl": "pkg:deb/ubuntu/bouncycastle@1.51-4ubuntu1+esm1?arch=source\u0026distro=esm-apps/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.49+dfsg-3ubuntu1",
"1.51-4ubuntu1",
"1.51-4ubuntu1+esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libbcmail-java",
"binary_version": "1.59-1ubuntu0.1~esm1"
},
{
"binary_name": "libbcpg-java",
"binary_version": "1.59-1ubuntu0.1~esm1"
},
{
"binary_name": "libbcpkix-java",
"binary_version": "1.59-1ubuntu0.1~esm1"
},
{
"binary_name": "libbcprov-java",
"binary_version": "1.59-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "bouncycastle",
"purl": "pkg:deb/ubuntu/bouncycastle@1.59-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.57-1",
"1.58-1",
"1.59-1",
"1.59-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libbcmail-java",
"binary_version": "1.61-1ubuntu0.1~esm1"
},
{
"binary_name": "libbcpg-java",
"binary_version": "1.61-1ubuntu0.1~esm1"
},
{
"binary_name": "libbcpkix-java",
"binary_version": "1.61-1ubuntu0.1~esm1"
},
{
"binary_name": "libbcprov-java",
"binary_version": "1.61-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "bouncycastle",
"purl": "pkg:deb/ubuntu/bouncycastle@1.61-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.61-1",
"1.61-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libbcmail-java",
"binary_version": "1.68-5ubuntu0.1~esm1"
},
{
"binary_name": "libbcpg-java",
"binary_version": "1.68-5ubuntu0.1~esm1"
},
{
"binary_name": "libbcpkix-java",
"binary_version": "1.68-5ubuntu0.1~esm1"
},
{
"binary_name": "libbcprov-java",
"binary_version": "1.68-5ubuntu0.1~esm1"
},
{
"binary_name": "libbctls-java",
"binary_version": "1.68-5ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "bouncycastle",
"purl": "pkg:deb/ubuntu/bouncycastle@1.68-5ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.68-2",
"1.68-4",
"1.68-5",
"1.68-5ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libbcjmail-java",
"binary_version": "1.77-1ubuntu0.1~esm1"
},
{
"binary_name": "libbcmail-java",
"binary_version": "1.77-1ubuntu0.1~esm1"
},
{
"binary_name": "libbcpg-java",
"binary_version": "1.77-1ubuntu0.1~esm1"
},
{
"binary_name": "libbcpkix-java",
"binary_version": "1.77-1ubuntu0.1~esm1"
},
{
"binary_name": "libbcprov-java",
"binary_version": "1.77-1ubuntu0.1~esm1"
},
{
"binary_name": "libbctls-java",
"binary_version": "1.77-1ubuntu0.1~esm1"
},
{
"binary_name": "libbcutil-java",
"binary_version": "1.77-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "bouncycastle",
"purl": "pkg:deb/ubuntu/bouncycastle@1.77-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.72-2",
"1.77-1",
"1.77-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libbcjmail-java",
"binary_version": "1.80-3"
},
{
"binary_name": "libbcmail-java",
"binary_version": "1.80-3"
},
{
"binary_name": "libbcpg-java",
"binary_version": "1.80-3"
},
{
"binary_name": "libbcpkix-java",
"binary_version": "1.80-3"
},
{
"binary_name": "libbcprov-java",
"binary_version": "1.80-3"
},
{
"binary_name": "libbctls-java",
"binary_version": "1.80-3"
},
{
"binary_name": "libbcutil-java",
"binary_version": "1.80-3"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "bouncycastle",
"purl": "pkg:deb/ubuntu/bouncycastle@1.80-3?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.80-3"
]
}
],
"aliases": [],
"details": "In Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series), sensitive key material held by the AES and DESede engines, the SP 800-90A DRBGs, SymmetricSecretKey and the PBKD and scrypt parameter classes was zeroised on garbage collection by overriding Object.finalize. Finalization runs at an unspecified time and in an unspecified order and is serviced by a single finalizer thread, so where objects carrying a finalizer are allocated faster than that thread retires them the pending-finalization queue grows without bound: disposal falls arbitrarily far behind, which can contribute to an OutOfMemoryError under load, and the key material those objects hold stays resident in the heap for as long as they are queued, defeating the purpose of the zeroisation. The behaviour was not a problem on Java 8 or Java 11; it is later JVMs, on which finalization has been deprecated and progressively de-emphasised, where it becomes one. Disposal of these classes now runs from a java.lang.ref.Cleaner registered in the multi-release jdk1.9 overlay, so on Java 9 and later it no longer depends on the finalizer being scheduled. Bouncy Castle for Java (bcprov) and Bouncy Castle for Java LTS are not affected, as neither implements the finalizer-based zeroisation scheme.",
"id": "UBUNTU-CVE-2026-13505",
"modified": "2026-08-13T00:02:16Z",
"published": "2026-08-08T02:17:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-13505"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-13505"
},
{
"type": "REPORT",
"url": "https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9013505"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Amber",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-13505"
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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