CVE-2025-46723 - OpenVM AUIPC Instruction Overflow Vulnerability

CVE-2025-46723 - OpenVM AUIPC Instruction Overflow Vulnerability

https://cvefeed.io/rssfeed/latest.atom / Sat, 05/03/2025 - 02:38
CVE ID : CVE-2025-46723
Published : May 2, 2025, 11:15 p.m. | 1 hour, 3 minutes ago
Description : OpenVM is a performant and modular zkVM framework built for customization and extensibility. In version 1.0.0, OpenVM is vulnerable to overflow through byte decomposition of pc in AUIPC chip. A typo results in the highest limb of pc being range checked to 8-bits instead of 6-bits. This results in the if statement never being triggered because the enumeration gives i=0,1,2, when instead the enumeration should give i=1,2,3, leaving pc_limbs[3] range checked to 8-bits instead of 6-bits. This leads to a vulnerability where the pc_limbs decomposition differs from the true pc, which means a malicious prover can make the destination register take a different value than the AUIPC instruction dictates, by making the decomposition overflow the BabyBear field. This issue has been patched in version 1.1.0.
Severity: 0.0 | NA
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