CVE-2025-14813: Bouncy Castle for Java GOST 28147 CTR mode reuses keystream after 255 blocks
The GOST 28147-2015 CTR mode implementation (G3413CTRBlockCipher) in the Legion of the Bouncy Castle BC-JAVA bcprov core module only increments the final byte of the counter, so the counter wraps after 255 blocks and the keystream is reused. Reusing CTR keystream allows an attacker who can observe two ciphertexts produced with the same key/IV to recover the XOR of the plaintexts, breaking confidentiality.
Published Apr 17, 2026 · Updated Sep 24, 2026
Affected packages
org.bouncycastle:bcprov-jdk14
- Ecosystem
- Maven
- Affected
- >= 1.59, <= 1.80.1
- Fixed in
- No patched version yet
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-jdk14
org.bouncycastle:bcprov-jdk15to18
- Ecosystem
- Maven
- Affected
- >= 1.59, <= 1.80.1
- Fixed in
- No patched version yet
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-jdk15to18
org.bouncycastle:bcprov-jdk18on
- Ecosystem
- Maven
- Affected
- >= 1.59, <= 1.80.1
- Fixed in
- 1.80.2
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-jdk18on
org.bouncycastle:bcprov-debug-jdk14
- Ecosystem
- Maven
- Affected
- >= 1.59, <= 1.80.1
- Fixed in
- No patched version yet
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-debug-jdk14
org.bouncycastle:bcprov-debug-jdk15to18
- Ecosystem
- Maven
- Affected
- >= 1.59, <= 1.80.1
- Fixed in
- No patched version yet
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-debug-jdk15to18
org.bouncycastle:bcprov-debug-jdk18on
- Ecosystem
- Maven
- Affected
- >= 1.59, <= 1.80.1
- Fixed in
- No patched version yet
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-debug-jdk18on
org.bouncycastle:bcprov-ext-jdk14
- Ecosystem
- Maven
- Affected
- >= 1.59, <= 1.78.1
- Fixed in
- No patched version yet
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-ext-jdk14
org.bouncycastle:bcprov-ext-jdk15to18
- Ecosystem
- Maven
- Affected
- >= 1.59, <= 1.78.1
- Fixed in
- No patched version yet
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-ext-jdk15to18
org.bouncycastle:bcprov-ext-jdk18on
- Ecosystem
- Maven
- Affected
- >= 1.59, <= 1.78.1
- Fixed in
- No patched version yet
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-ext-jdk18on
org.bouncycastle:bcprov-ext-debug-jdk14
- Ecosystem
- Maven
- Affected
- >= 1.59, <= 1.74
- Fixed in
- No patched version yet
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-ext-debug-jdk14
org.bouncycastle:bcprov-ext-debug-jdk15to18
- Ecosystem
- Maven
- Affected
- >= 1.59, <= 1.77
- Fixed in
- No patched version yet
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-ext-debug-jdk15to18
org.bouncycastle:bcprov-ext-debug-jdk18on
- Ecosystem
- Maven
- Affected
- >= 1.59, <= 1.77
- Fixed in
- No patched version yet
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-ext-debug-jdk18on
org.bouncycastle:bcprov-jdk14
- Ecosystem
- Maven
- Affected
- = 1.81.0
- Fixed in
- No patched version yet
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-jdk14
org.bouncycastle:bcprov-jdk15to18
- Ecosystem
- Maven
- Affected
- = 1.81.0
- Fixed in
- No patched version yet
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-jdk15to18
org.bouncycastle:bcprov-jdk18on
- Ecosystem
- Maven
- Affected
- = 1.81.0
- Fixed in
- 1.81.1
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-jdk18on
org.bouncycastle:bcprov-debug-jdk14
- Ecosystem
- Maven
- Affected
- = 1.81.0
- Fixed in
- No patched version yet
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-debug-jdk14
org.bouncycastle:bcprov-debug-jdk15to18
- Ecosystem
- Maven
- Affected
- = 1.81.0
- Fixed in
- No patched version yet
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-debug-jdk15to18
org.bouncycastle:bcprov-debug-jdk18on
- Ecosystem
- Maven
- Affected
- = 1.81.0
- Fixed in
- No patched version yet
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-debug-jdk18on
org.bouncycastle:bcprov-jdk14
- Ecosystem
- Maven
- Affected
- >= 1.82, <= 1.83
- Fixed in
- 1.84
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-jdk14
org.bouncycastle:bcprov-jdk15to18
- Ecosystem
- Maven
- Affected
- >= 1.82, <= 1.83
- Fixed in
- 1.84
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-jdk15to18
org.bouncycastle:bcprov-jdk18on
- Ecosystem
- Maven
- Affected
- >= 1.82, <= 1.83
- Fixed in
- 1.84
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-jdk18on
org.bouncycastle:bcprov-debug-jdk14
- Ecosystem
- Maven
- Affected
- >= 1.82, <= 1.83
- Fixed in
- 1.84
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-debug-jdk14
org.bouncycastle:bcprov-debug-jdk15to18
- Ecosystem
- Maven
- Affected
- >= 1.82, <= 1.83
- Fixed in
- 1.84
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-debug-jdk15to18
org.bouncycastle:bcprov-debug-jdk18on
- Ecosystem
- Maven
- Affected
- >= 1.82, <= 1.83
- Fixed in
- 1.84
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-debug-jdk18on
org.bouncycastle:bcprov-debug-jdk15on
- Ecosystem
- Maven
- Affected
- <= 1.7.0
- Fixed in
- No patched version yet
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-debug-jdk15on
org.bouncycastle:bcprov-jdk15on
- Ecosystem
- Maven
- Affected
- <= 1.7.0
- Fixed in
- No patched version yet
- Check
mvn dependency:tree -Dincludes=org.bouncycastle:bcprov-jdk15on
Advisory details
From the GitHub Advisory Database (CC BY 4.0).
The GOST 28147-2015 CTR mode implementation (G3413CTRBlockCipher) in the Legion of the Bouncy Castle BC-JAVA bcprov core module only increments the final byte of the counter, so the counter wraps after 255 blocks and the keystream is reused. Reusing CTR keystream allows an attacker who can observe two ciphertexts produced with the same key/IV to recover the XOR of the plaintexts, breaking confidentiality. Affects BC-JAVA from 1.59 before 1.84 (with backported fixes in 1.80.2 and 1.81.1).
Credited to simon-reisinger-dynatrace.
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-14813
- https://github.com/bcgit/bc-java/commit/701686cb0184cd9ae103c801b3581fdf95c6d4f3
- https://github.com/bcgit/bc-java/commit/b42574345414e4b7c8051b16fa1fafe01c29871f
- https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902025%E2%80%9014813
- https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-14813.json
- https://bugzilla.redhat.com/show_bug.cgi?id=2458640
- https://access.redhat.com/security/cve/CVE-2025-14813
- https://access.redhat.com/errata/RHSA-2026:24977
- https://access.redhat.com/errata/RHSA-2026:21772
- https://access.redhat.com/errata/RHSA-2026:18059
- https://access.redhat.com/errata/RHSA-2026:18055
- https://access.redhat.com/errata/RHSA-2026:18054
- https://access.redhat.com/errata/RHSA-2026:17668
- https://access.redhat.com/errata/RHSA-2026:14276
- https://access.redhat.com/errata/RHSA-2026:14272
- https://access.redhat.com/errata/RHSA-2026:13631
- https://access.redhat.com/errata/RHSA-2026:11721
- https://access.redhat.com/errata/RHSA-2026:11720
- https://access.redhat.com/errata/RHSA-2026:60247
- https://access.redhat.com/errata/RHSA-2026:60248
- https://access.redhat.com/errata/RHSA-2026:60249
- https://access.redhat.com/errata/RHSA-2026:60250
- https://access.redhat.com/errata/RHSA-2026:60251
- https://access.redhat.com/errata/RHSA-2026:60252
- https://access.redhat.com/errata/RHSA-2026:60254
- https://access.redhat.com/errata/RHSA-2026:60256
- https://access.redhat.com/errata/RHSA-2026:60259
- https://access.redhat.com/errata/RHSA-2026:66488
- https://access.redhat.com/errata/RHSA-2026:53644
- https://access.redhat.com/errata/RHSA-2026:53645
How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology