{"id":"CVE-2022-26477","aliases":[],"url":"https://o3.security/vulnerability/CVE-2022-26477","summary":"The Security Team noticed that the termination condition of the for loop in the readExternal method is a controllable variable, which, if tampered with, may lead to CPU exhaustion.…","details":"The Security Team noticed that the termination condition of the for loop in the readExternal method is a controllable variable, which, if tampered with, may lead to CPU exhaustion. As a fix, we added an upper bound and termination condition in the read and write logic. We classify it as a \"low-priority but useful improvement\". SystemDS is a distributed system and needs to serialize/deserialize data but in many code paths (e.g., on Spark broadcast/shuffle or writing to sequence files) the byte stream is anyway protected by additional CRC fingerprints. In this particular case though, the number of decoders is upper-bounded by twice the number of columns, which means an attacker would need to modify two entries in the byte stream in a consistent manner. By adding these checks robustness was strictly improved with almost zero overhead. These code changes are available in versions higher than 2.2.1.","published":"2022-06-27T18:15:08.853","modified":"2026-06-17T04:35:16.220","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://lists.apache.org/thread/r4x2d2r6d4zykdrrx6s2l4qbxgzws0z3"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20220812-0003/"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/r4x2d2r6d4zykdrrx6s2l4qbxgzws0z3"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20220812-0003/"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-06-17T04:35:16.220"}}