{"id":"CVE-2026-32314","aliases":["DEBIAN-CVE-2026-32314","EUVD-2026-12095","GHSA-vxx9-2994-q338","UBUNTU-CVE-2026-32314"],"status":"published","title":"Yamux remote Panic via malformed Data frame with SYN set and len = 262145","description":"Yamux is a stream multiplexer over reliable, ordered connections such as TCP/IP. Prior to 0.13.10, the Rust implementation of Yamux can panic when processing a crafted inbound Data frame that sets SYN and uses a body length greater than DEFAULT_CREDIT (e.g. 262145). On the first packet of a new inbound stream, stream state is created and a receiver is queued before oversized-body validation completes. When validation fails, the temporary stream is dropped and cleanup may call remove(...).expect(\"stream not found\"), triggering a panic in the connection state machine. This is remotely reachable over a normal Yamux session and does not require authentication. This vulnerability is fixed in 0.13.10.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00524,"percentile":0.44974,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-248","CWE-617"],"published":"2026-03-13T19:53:08Z","modified":"2026-11-09T02:47:19Z","fixes":[{"ecosystem":"crates.io","package":"yamux","fixed_in":["0.13.10"],"sources":["ghsa","osv"]},{"ecosystem":"Debian:14","package":"rust-yamux","fixed_in":["0.13.10+ds-1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"crates.io","package":"yamux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.10"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"rust-yamux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.13.10+ds-1","0.13.10+ds-2","0.13.3-4","0.13.7-1","0.13.8-1","0.13.9+ds-1"]},{"source":"osv","ecosystem":"Debian:14","package":"rust-yamux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.10+ds-1"}]}],"versions":["0.13.3-4","0.13.7-1","0.13.8-1","0.13.9+ds-1"]},{"source":"osv","ecosystem":"crates.io","package":"yamux","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.13.10"}]}]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"rust-yamux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.13.3-4"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"rust-yamux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.13.8-1","0.13.10+ds-2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"rust-yamux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.13.3-4","0.13.7-1","0.13.8-1"]}],"products":[{"vendor":"libp2p","product":"rust-yamux"},{"vendor":"protocol","product":"yamux"}],"references":[{"url":"https://github.com/libp2p/rust-yamux/security/advisories/GHSA-vxx9-2994-q338","tags":["x_refsource_CONFIRM","Exploit","Vendor Advisory","advisory","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32314","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-vxx9-2994-q338"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32314.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-32314","tags":["advisory"]},{"url":"https://github.com/libp2p/rust-yamux","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2026-32314","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-32314","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-32314","title":"Yamux remote Panic via malformed Data frame with SYN set and len = 262145","description":"Yamux is a stream multiplexer over reliable, ordered connections such as TCP/IP. Prior to 0.13.10, the Rust implementation of Yamux can panic when processing a crafted inbound Data frame that sets SYN and uses a body length greater than DEFAULT_CREDIT (e.g. 262145). On the first packet of a new inbound stream, stream state is created and a receiver is queued before oversized-body validation completes. When validation fails, the temporary stream is dropped and cleanup may call remove(...).expect(\"stream not found\"), triggering a panic in the connection state machine. This is remotely reachable over a normal Yamux session and does not require authentication. This vulnerability is fixed in 0.13.10.","status":"published","published":"2026-03-13T19:53:08.823Z","modified":"2026-03-16T13:48:29.665Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-248"],"updated_at":"2026-11-02T14:19:57.100857Z"}],"euvd":[{"id":"EUVD-2026-12095","description":"Yamux is a stream multiplexer over reliable, ordered connections such as TCP/IP. Prior to 0.13.10, the Rust implementation of Yamux can panic when processing a crafted inbound Data frame that sets SYN and uses a body length greater than DEFAULT_CREDIT (e.g. 262145). On the first packet of a new inbound stream, stream state is created and a receiver is queued before oversized-body validation completes. When validation fails, the temporary stream is dropped and cleanup may call remove(...).expect(\"stream not found\"), triggering a panic in the connection state machine. This is remotely reachable over a normal Yamux session and does not require authentication. This vulnerability is fixed in 0.13.10.","status":"published","published":"2026-03-13T19:53:08Z","modified":"2026-03-16T13:48:29Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T19:25:34.563327Z"}],"ghsa":[{"id":"GHSA-vxx9-2994-q338","title":"Yamux vulnerable to remote Panic via malformed Data frame with SYN set and len = 262145","description":"### Summary\nThe Rust implementation of Yamux can panic when processing a crafted inbound Data frame that sets SYN and uses a body length greater than DEFAULT_CREDIT (e.g. 262145).\nOn the first packet of a new inbound stream, stream state is created and a receiver is queued before oversized-body validation completes. When validation fails, the temporary stream is dropped and cleanup may call remove(...).expect(\"stream not found\"), triggering a panic in the connection state machine.\nThis is remotely reachable over a normal Yamux session and does not require authentication. kind of vulnerability is it? Who is \n#### Attack Scenario  \nAn attacker that can establish a Yamux session with a target node can crash the target by sending a single validly encoded Yamux Data|SYN frame with an oversized body:\n1. Establish a standard authenticated transport session that negotiates Yamux.\n2. Send one Yamux frame with:\n   - Tag = Data\n   - Flags = SYN\n   - StreamId = 1 (or any new inbound stream id)\n   - Length = DEFAULT_CREDIT + 1 (e.g. 262145)\n   - Body of matching size\nThis can trigger a panic (stream not found) and terminate the process, depending on host application panic policy.\n### Patches\nUsers should upgrade to `yamux` `v0.13.10`\n\nThis vulnerability was originally submitted by @revofusion to the Ethereum Foundation bug bounty program","status":"published","published":"2026-03-13T20:04:38Z","modified":"2026-03-16T22:01:16Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-248","CWE-617"],"updated_at":"2026-11-02T14:39:36.642723Z"}],"nvd":[{"id":"CVE-2026-32314","description":"Yamux is a stream multiplexer over reliable, ordered connections such as TCP/IP. Prior to 0.13.10, the Rust implementation of Yamux can panic when processing a crafted inbound Data frame that sets SYN and uses a body length greater than DEFAULT_CREDIT (e.g. 262145). On the first packet of a new inbound stream, stream state is created and a receiver is queued before oversized-body validation completes. When validation fails, the temporary stream is dropped and cleanup may call remove(...).expect(\"stream not found\"), triggering a panic in the connection state machine. This is remotely reachable over a normal Yamux session and does not require authentication. This vulnerability is fixed in 0.13.10.","status":"published","published":"2026-03-16T14:19:34.03Z","modified":"2026-06-17T10:35:32.927Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","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-248"],"updated_at":"2026-11-02T14:12:09.358914Z"}],"osv":[{"id":"CVE-2026-32314","title":"Yamux remote Panic via malformed Data frame with SYN set and len = 262145","description":"Yamux is a stream multiplexer over reliable, ordered connections such as TCP/IP. Prior to 0.13.10, the Rust implementation of Yamux can panic when processing a crafted inbound Data frame that sets SYN and uses a body length greater than DEFAULT_CREDIT (e.g. 262145). On the first packet of a new inbound stream, stream state is created and a receiver is queued before oversized-body validation completes. When validation fails, the temporary stream is dropped and cleanup may call remove(...).expect(\"stream not found\"), triggering a panic in the connection state machine. This is remotely reachable over a normal Yamux session and does not require authentication. This vulnerability is fixed in 0.13.10.","status":"published","published":"2026-03-13T19:53:08.823Z","modified":"2026-11-09T02:47:19.770394583Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-248"],"updated_at":"2026-11-09T03:16:17.543303Z"},{"id":"DEBIAN-CVE-2026-32314","description":"Yamux is a stream multiplexer over reliable, ordered connections such as TCP/IP. Prior to 0.13.10, the Rust implementation of Yamux can panic when processing a crafted inbound Data frame that sets SYN and uses a body length greater than DEFAULT_CREDIT (e.g. 262145). On the first packet of a new inbound stream, stream state is created and a receiver is queued before oversized-body validation completes. When validation fails, the temporary stream is dropped and cleanup may call remove(...).expect(\"stream not found\"), triggering a panic in the connection state machine. This is remotely reachable over a normal Yamux session and does not require authentication. This vulnerability is fixed in 0.13.10.","status":"published","published":"2026-03-16T14:19:34.03Z","modified":"2026-10-01T03:03:21.950997734Z","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"}],"updated_at":"2026-11-02T15:45:54.232518Z"},{"id":"GHSA-vxx9-2994-q338","title":"Yamux vulnerable to remote Panic via malformed Data frame with SYN set and len = 262145","description":"### Summary\nThe Rust implementation of Yamux can panic when processing a crafted inbound Data frame that sets SYN and uses a body length greater than DEFAULT_CREDIT (e.g. 262145).\nOn the first packet of a new inbound stream, stream state is created and a receiver is queued before oversized-body validation completes. When validation fails, the temporary stream is dropped and cleanup may call remove(...).expect(\"stream not found\"), triggering a panic in the connection state machine.\nThis is remotely reachable over a normal Yamux session and does not require authentication. kind of vulnerability is it? Who is \n#### Attack Scenario  \nAn attacker that can establish a Yamux session with a target node can crash the target by sending a single validly encoded Yamux Data|SYN frame with an oversized body:\n1. Establish a standard authenticated transport session that negotiates Yamux.\n2. Send one Yamux frame with:\n   - Tag = Data\n   - Flags = SYN\n   - StreamId = 1 (or any new inbound stream id)\n   - Length = DEFAULT_CREDIT + 1 (e.g. 262145)\n   - Body of matching size\nThis can trigger a panic (stream not found) and terminate the process, depending on host application panic policy.\n### Patches\nUsers should upgrade to `yamux` `v0.13.10`\n\nThis vulnerability was originally submitted by @revofusion to the Ethereum Foundation bug bounty program","status":"published","published":"2026-03-13T20:04:38Z","modified":"2026-03-16T22:16:17.324879Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-248","CWE-617"],"updated_at":"2026-11-02T15:46:58.04805Z"},{"id":"UBUNTU-CVE-2026-32314","description":"Yamux is a stream multiplexer over reliable, ordered connections such as TCP/IP. Prior to 0.13.10, the Rust implementation of Yamux can panic when processing a crafted inbound Data frame that sets SYN and uses a body length greater than DEFAULT_CREDIT (e.g. 262145). On the first packet of a new inbound stream, stream state is created and a receiver is queued before oversized-body validation completes. When validation fails, the temporary stream is dropped and cleanup may call remove(...).expect(\"stream not found\"), triggering a panic in the connection state machine. This is remotely reachable over a normal Yamux session and does not require authentication. This vulnerability is fixed in 0.13.10.","status":"published","published":"2026-03-16T14:19:00Z","modified":"2026-10-17T12:58:09.751245274Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"},{"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"}],"updated_at":"2026-11-02T16:56:16.036833Z"}]}}