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CVE-2023-23631

HAMT Decoding Panics in github.com/ipfs/go-unixfsnode

HIGH
7.5
CVSS Score
Published: February 9, 2023 at 08:46 PM UTC
Updated: June 17, 2026 at 05:37 AM UTC
2 products affected across 2 vendorsGo UnixfsnodeGo Unixfsnode

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Severity
HIGH7.5
Exploit prediction
EPSS 0.9%
SSVC
No known exploit

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. 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. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Go Unixfsnode· Protocolgo
95%
v < 1.5.2
Affected range stops below 1.5.2, so it looks safe — our inference, not a vendor statement
Go Unixfsnode· Ipfs
60%
v < 1.5.2
Affected range stops below 1.5.2, so it looks safe — our inference, not a vendor statement

References (4)

x_refsource_MISCPatch
Source: [email protected]
https://github.com/ipfs/go-unixfsnode/commit/59050ea8bc458ae55246ae09243e6e165923e076
x_refsource_MISCPatch
Source: [email protected]
https://github.com/ipfs/go-unixfsnode/commit/91b3d39d33ef0cd2aff2c95d50b2329350944b68
x_refsource_MISCPatch
Source: [email protected]
https://github.com/ipfs/go-unixfsnode/commit/a4ed723727e0bdc2277158337c2fc0d82802d122
x_refsource_CONFIRMPatchVendor Advisory
Source: [email protected]
https://github.com/ipfs/go-unixfsnode/security/advisories/GHSA-4gj3-6r43-3wfc

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400

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