CVE-2026-8149: GCM chunking can lead to bad tag exception on decryption
A vulnerability in Legion of the Bouncy Castle Inc. BC-LTS bcprov-lts8on on X8664, AVX, AVX-512f, Linux, Legion of the Bouncy Castle Inc. BC-FJA bc-fips on Linux, X8664, AVX, AVX-512f.
This vulnerability is associated with program files gcm128w, gcm512w, gcm128w.C, gcm512w.C.
This issue affects BC-LTS: from 2.73.0 before 2.73.11; BC-FJA: from 2.1.0 before 2.1.3.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-8149?
CVE-2026-8149 has a high severity due to potential decryption failures caused by bad tag exceptions.
How do I fix CVE-2026-8149?
To fix CVE-2026-8149, upgrade the Bouncy Castle BC-FJA library to version 2.1.3 or later.
What software is affected by CVE-2026-8149?
CVE-2026-8149 affects Bouncy Castle BC-FJA versions from 2.1.0 through 2.1.2.
What types of systems are impacted by CVE-2026-8149?
CVE-2026-8149 primarily impacts Linux systems running on x86_64 with AVX and AVX-512f.
What function of Bouncy Castle is vulnerable in CVE-2026-8149?
CVE-2026-8149 involves a vulnerability in the GCM chunking functionality during decryption.