CVE-2026-73568
- Source
- https://cve.org/CVERecord?id=CVE-2026-73568
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73568.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-73568
- Aliases
- Published
- 2026-08-13T17:43:26Z
- Modified
- 2026-10-21T02:59:16Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- py-libp2p: yamux connection DoS via oversized data frame
- Details
-
py-libp2p is the Python implementation of the libp2p networking stack. In 0.7.0 and earlier, the yamux handle_incoming() method in libp2p/stream_muxer/yamux/yamux.py reads an attacker-controlled 32-bit DATA frame length with read_exactly() before validating it against MAX_WINDOW_SIZE or checking whether stream_id exists. A peer that completes the standard Noise handshake can send a 12-byte frame declaring a 0xFFFFFFFF body and then withhold the body, causing the sequential yamux read loop used by the default new_host() configuration to block and preventing every stream on that connection from making progress. No fixed version is available as of this review.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-400" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73568.json" }- References
Affected packages
Git / github.com/libp2p/py-libp2p
Affected ranges
- Type
- GIT
- Repo
- https://github.com/libp2p/py-libp2p
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "last_affected": "0.7.0" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "fixed": "146ea87d1a20cc7dacf684ecf7c204543be04b37" } ], "source": "REFERENCES_COMMIT" } ] }