{"id":"CVE-2023-23631","aliases":["EUVD-2023-0622","GHSA-4gj3-6r43-3wfc","GO-2023-1559"],"status":"published","title":"HAMT Decoding Panics in github.com/ipfs/go-unixfsnode","description":"github.com/ipfs/go-unixfsnode is an ADL IPLD prime node that wraps go-codec-dagpb's implementation of protobuf to enable pathing. In versions priot to 1.5.2 trying to read malformed HAMT sharded directories can cause panics and virtual memory leaks.\nIf you are reading untrusted user input, an attacker can then trigger a panic. This is caused by bogus fanout parameter in the HAMT directory nodes. Users are advised to upgrade. There are no known workarounds for this vulnerability.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00908,"percentile":0.60233,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400"],"published":"2023-02-09T20:46:22Z","modified":"2026-10-28T02:30:41Z","fixes":[{"ecosystem":"Go","package":"github.com/ipfs/go-unixfsnode","fixed_in":["1.5.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/ipfs/go-unixfsnode","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.5.2"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/ipfs/go-unixfsnode","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.5.2"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/ipfs/go-unixfsnode","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.5.2"}]}]}],"products":[{"vendor":"ipfs","product":"go-unixfsnode"},{"vendor":"protocol","product":"go-unixfsnode"}],"references":[{"url":"https://github.com/ipfs/go-unixfsnode/security/advisories/GHSA-4gj3-6r43-3wfc","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","advisory","web"]},{"url":"https://github.com/ipfs/go-unixfsnode/commit/59050ea8bc458ae55246ae09243e6e165923e076","tags":["x_refsource_MISC","x_transferred","Patch","fix","web"]},{"url":"https://github.com/ipfs/go-unixfsnode/commit/91b3d39d33ef0cd2aff2c95d50b2329350944b68","tags":["x_refsource_MISC","x_transferred","Patch","fix","web"]},{"url":"https://github.com/ipfs/go-unixfsnode/commit/a4ed723727e0bdc2277158337c2fc0d82802d122","tags":["x_refsource_MISC","x_transferred","Patch","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-23631","tags":["advisory"]},{"url":"https://pkg.go.dev/vuln/GO-2023-1559","tags":["web"]},{"url":"https://github.com/advisories/GHSA-4gj3-6r43-3wfc"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/23xxx/CVE-2023-23631.json","tags":["advisory"]},{"url":"https://github.com/ipfs/go-unixfsnode","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2023-23631","title":"HAMT Decoding Panics in github.com/ipfs/go-unixfsnode","description":"github.com/ipfs/go-unixfsnode is an ADL IPLD prime node that wraps go-codec-dagpb's implementation of protobuf to enable pathing. In versions priot to 1.5.2 trying to read malformed HAMT sharded directories can cause panics and virtual memory leaks.\nIf you are reading untrusted user input, an attacker can then trigger a panic. This is caused by bogus fanout parameter in the HAMT directory nodes. Users are advised to upgrade. There are no known workarounds for this vulnerability.","status":"published","published":"2023-02-09T20:46:22.93Z","modified":"2025-03-10T21:14:10.912Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:35:20.812737Z"}],"euvd":[{"id":"EUVD-2023-0622","description":"github.com/ipfs/go-unixfsnode is an ADL IPLD prime node that wraps go-codec-dagpb's implementation of protobuf to enable pathing. In versions priot to 1.5.2 trying to read malformed HAMT sharded directories can cause panics and virtual memory leaks.\nIf you are reading untrusted user input, an attacker can then trigger a panic. This is caused by bogus fanout parameter in the HAMT directory nodes. Users are advised to upgrade. There are no known workarounds for this vulnerability.","status":"published","published":"2023-02-09T20:46:22Z","modified":"2025-03-10T21:14:10Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T20:53:09.197707Z"}],"ghsa":[{"id":"GHSA-4gj3-6r43-3wfc","title":"IPFS go-unixfsnode subject to DOS via HAMT Decoding Panics","description":"## Impact\n\nTrying to read malformed HAMT sharded directories can cause panics and virtual memory leaks.\nIf you are reading untrusted user input, an attacker can then trigger a panic.\n\nThis is caused by a bogus fanout parameter in the HAMT directory nodes.\nThis includes checks returned in [ipfs/go-bitfield GHSA-2h6c-j3gf-xp9r](https://github.com/ipfs/go-bitfield/security/advisories/GHSA-2h6c-j3gf-xp9r), as well as limiting the fanout to \u003c= 1024 (to avoid attempts of arbitrary sized allocations).\n\n## Patches\n- https://github.com/ipfs/go-unixfsnode/commit/91b3d39d33ef0cd2aff2c95d50b2329350944b68\n- https://github.com/ipfs/go-unixfsnode/commit/a4ed723727e0bdc2277158337c2fc0d82802d122\n\n## References\n\n* https://github.com/ipfs/go-unixfs/security/advisories/GHSA-q264-w97q-q778\n* https://github.com/ipfs/go-bitfield/security/advisories/GHSA-2h6c-j3gf-xp9r\n","status":"published","published":"2023-02-10T19:54:14Z","modified":"2023-02-17T20:32:08Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:36:45.67005Z"}],"nvd":[{"id":"CVE-2023-23631","description":"github.com/ipfs/go-unixfsnode is an ADL IPLD prime node that wraps go-codec-dagpb's implementation of protobuf to enable pathing. In versions priot to 1.5.2 trying to read malformed HAMT sharded directories can cause panics and virtual memory leaks.\nIf you are reading untrusted user input, an attacker can then trigger a panic. This is caused by bogus fanout parameter in the HAMT directory nodes. Users are advised to upgrade. There are no known workarounds for this vulnerability.","status":"published","published":"2023-02-09T21:15:11.513Z","modified":"2026-06-17T05:37:37.693Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:07:46.811196Z"}],"osv":[{"id":"CVE-2023-23631","title":"HAMT Decoding Panics in github.com/ipfs/go-unixfsnode","description":"github.com/ipfs/go-unixfsnode is an ADL IPLD prime node that wraps go-codec-dagpb's implementation of protobuf to enable pathing. In versions priot to 1.5.2 trying to read malformed HAMT sharded directories can cause panics and virtual memory leaks.\nIf you are reading untrusted user input, an attacker can then trigger a panic. This is caused by bogus fanout parameter in the HAMT directory nodes. Users are advised to upgrade. There are no known workarounds for this vulnerability.","status":"published","published":"2023-02-09T20:46:22.93Z","modified":"2026-10-28T02:30:41.098325262Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:44:30.709518Z"},{"id":"GHSA-4gj3-6r43-3wfc","title":"IPFS go-unixfsnode subject to DOS via HAMT Decoding Panics","description":"## Impact\n\nTrying to read malformed HAMT sharded directories can cause panics and virtual memory leaks.\nIf you are reading untrusted user input, an attacker can then trigger a panic.\n\nThis is caused by a bogus fanout parameter in the HAMT directory nodes.\nThis includes checks returned in [ipfs/go-bitfield GHSA-2h6c-j3gf-xp9r](https://github.com/ipfs/go-bitfield/security/advisories/GHSA-2h6c-j3gf-xp9r), as well as limiting the fanout to \u003c= 1024 (to avoid attempts of arbitrary sized allocations).\n\n## Patches\n- https://github.com/ipfs/go-unixfsnode/commit/91b3d39d33ef0cd2aff2c95d50b2329350944b68\n- https://github.com/ipfs/go-unixfsnode/commit/a4ed723727e0bdc2277158337c2fc0d82802d122\n\n## References\n\n* https://github.com/ipfs/go-unixfs/security/advisories/GHSA-q264-w97q-q778\n* https://github.com/ipfs/go-bitfield/security/advisories/GHSA-2h6c-j3gf-xp9r\n","status":"published","published":"2023-02-10T19:54:14Z","modified":"2026-09-10T03:49:56.605610741Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:46:37.148947Z"},{"id":"GO-2023-1559","title":"Denial of service via HAMT decoding panic in github.com/ipfs/go-unixfsnode","description":"Trying to read malformed HAMT sharded directories can cause panics and virtual memory leaks. If you are reading untrusted user input, an attacker can then trigger a panic.\n\nThis is caused by a bogus fanout parameter in the HAMT directory nodes.\n\nThere are no known workarounds (users are advised to upgrade).","status":"published","published":"2023-02-14T19:41:30Z","modified":"2024-05-20T16:03:47Z","updated_at":"2026-11-02T15:47:01.185262Z"}]}}