{"id":"GHSA-5rg2-xv9j-gv5p","summary":"nimiq-primitives: Out-of-bounds panic in KeyNibbles::Add from oversized child suffix in a deserialized proof","details":"### Impact\n\nA malicious peer acting as a state-sync source can crash a syncing node with a crafted `TrieChunk` whose proof contains a `TrieNodeChild` whose `suffix`, when concatenated with the parent key via `KeyNibbles::Add`, exceeds the fixed 63-byte backing array. `Add` (`primitives/src/key_nibbles.rs:332` / `:341`) indexes `bytes[self.bytes_len()..self.bytes_len() + other.bytes_len()]` with no combined-length check, causing an out-of-bounds slice panic (both the even- and odd-length branches).\n\n`KeyNibbles` deserialization validates only the individual `length \u003c= 126`, not the combined parent + suffix length. The panic occurs at `put_chunk` → `child.key()` → `is_stump()` → `+`, i.e. **before** `proof.verify()`, so no valid proof is required. As with the related `child_index` issue, exploitation requires being the victim's sync peer during state sync, and the resulting crash is transient (the node restarts and re-syncs).\n\nAffected: core-rs-albatross \u003c= 1.5.1 (`nimiq-primitives`).\n\n### Patches\n\nFixed in **1.6.0** via https://github.com/nimiq/core-rs-albatross/pull/3790 (commit `eabfc3e2`), which guards key-nibble concatenation against exceeding the maximum length instead of indexing out of bounds.\n\n### Workarounds\n\nNone other than syncing only from trusted peers. Upgrade to 1.6.0.","aliases":["CVE-2026-54542"],"modified":"2026-07-16T20:26:44.362618Z","published":"2026-07-16T20:03:25Z","database_specific":{"severity":"LOW","github_reviewed":true,"github_reviewed_at":"2026-07-16T20:03:25Z","nvd_published_at":null,"cwe_ids":["CWE-125"]},"references":[{"type":"WEB","url":"https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-5rg2-xv9j-gv5p"},{"type":"WEB","url":"https://github.com/nimiq/core-rs-albatross/pull/3790"},{"type":"WEB","url":"https://github.com/nimiq/core-rs-albatross/commit/eabfc3e21731b0628c3f933163a0f1e1864217bf"},{"type":"PACKAGE","url":"https://github.com/nimiq/core-rs-albatross"},{"type":"WEB","url":"https://github.com/nimiq/core-rs-albatross/releases/tag/v1.6.0"}],"affected":[{"package":{"name":"nimiq-primitives","ecosystem":"crates.io","purl":"pkg:cargo/nimiq-primitives"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.6.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-5rg2-xv9j-gv5p/GHSA-5rg2-xv9j-gv5p.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}