Answer in brief
CVE-2023-23625 records a Medium severity (CVSS 5.9) vulnerability in Denial of service via HAMT Decoding Panics. The current sources do not mark it as known exploited. The current feed maps github.com/ipfs/go-unixfs (go). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps github.com/ipfs/go-unixfs (go). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| github.com/ipfs/go-unixfsgo | >=0 <0.4.3 | 0.4.3 |
Published upstream
Feb 10, 2023
Evidence: source:osv:source_dates:source-dates:recordSource modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:recordFirst seen by HOL
Sep 10, 2026
### Impact 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. This is caused by bogus `fanout` parameter in the HAMT directory nodes. This include 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 `<= 1024` (to avoid attempts of arbitrary sized allocations). ### Patches - https://github.com/ipfs/go-unixfs/commit/dbcc43ec3e2db0d01e8d80c55040bba3cf22cb4b ### Workarounds Do not feed untrusted user data to the decoding functions. ### References - https://github.com/ipfs/go-bitfield/security/advisories/GHSA-2h6c-j3gf-xp9r
Quoted source text, attributed separately from HOL analysis.