Source: capstone Version: 5.0.9-1 Severity: important Tags: security upstream X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>
Hi, The following vulnerability was published for capstone. CVE-2026-49263[0]: | Capstone is a disassembly framework. Prior to version 6.0.0-Alpha9, | Capstone's WebAssembly backend accepts attacker-controlled raw WASM | instruction bytes through the public `cs_disasm()` and | `cs_disasm_iter()` APIs. For a large but well-formed `br_table` | instruction, the WASM decoder accumulates the immediate length in a | wider local variable but returns it through a `uint16_t` | instruction-size path. When the encoded instruction length is | exactly 65,536 bytes, the size wraps to zero and `cs_disasm()` can | repeatedly decode the same instruction without advancing. For larger | lengths, `cs_disasm_iter()` advances into the middle of the | `br_table` payload and decodes target bytes as subsequent | instructions. This is an availability and parser-integrity issue. | Version 6.0.0-Alpha9 patches the issue. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-49263 https://www.cve.org/CVERecord?id=CVE-2026-49263 [1] https://github.com/capstone-engine/capstone/security/advisories/GHSA-5m9f-vqcm-g5pr Please adjust the affected versions in the BTS as needed. Regards, Salvatore
