{"id":"CVE-2023-23626","aliases":["GHSA-2h6c-j3gf-xp9r","GO-2023-1558"],"url":"https://o3.security/vulnerability/CVE-2023-23626","summary":"Denial of service when feeding malformed size arguments in go-bitfield","details":"go-bitfield is a simple bitfield package for the go language aiming to be more performant that the standard library. When feeding untrusted user input into the size parameter of `NewBitfield` and `FromBytes` functions, an attacker can trigger `panic`s. This happen when the `size` is a not a multiple of `8` or is negative. There were already a note in the `NewBitfield` documentation, however known users of this package are subject to this issue. Users are advised to upgrade. Users unable to upgrade should ensure that `size` is a multiple of 8 before calling `NewBitfield` or `FromBytes`.\n","published":"2023-02-09T20:54:07.075Z","modified":"2026-08-12T03:51:25.016118362Z","cvss":{"score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Go","name":"github.com/ipfs/go-bitfield","fixedVersion":"1.1.0"}],"fix":{"url":"https://github.com/ipfs/go-bitfield/commit/5e1d256fe043fc4163343ccca83862c69c52e579","label":"ipfs/go-bitfield@5e1d256"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/23xxx/CVE-2023-23626.json"},{"type":"ADVISORY","url":"https://github.com/ipfs/go-bitfield/security/advisories/GHSA-2h6c-j3gf-xp9r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-23626"},{"type":"FIX","url":"https://github.com/ipfs/go-bitfield/commit/5e1d256fe043fc4163343ccca83862c69c52e579"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:25.016118362Z"}}