Inconsistency between implementation and documented design in Bouncy Castle for Java FIPS and Bouncy Castle for Java LTS - CVE-2026-8149
Published: May 25, 2026
Vulnerability identifier: #VU132272
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-8149
CWE-ID: CWE-1068
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise cryptographic integrity.
The vulnerability exists due to inconsistency between implementation and documented design in gcm128w and gcm512w when performing GCM operations on Linux x86_64 systems with AVX or AVX-512f support. A remote attacker can trigger the affected cryptographic code path to compromise cryptographic integrity.
Only Linux x86_64 environments with AVX or AVX-512f support are affected.
Affected software
Bouncy Castle for Java FIPS
Bouncy Castle for Java LTS
Bouncy Castle for Java LTS
How to mitigate CVE-2026-8149
Install security update from vendor's website.
Bouncy Castle for Java FIPS - update to 2.1.2
Bouncy Castle for Java LTS - update to 2.73.11
Bouncy Castle for Java LTS - update to 2.73.11