High
rust-futures-task — security advisory
An issue was discovered in the futures-task crate before 0.3.6 for Rust. futures_task::waker may cause a use-after-free in a non-static type situation.
- Products
- rust-futures-task
- Affected versions
- 0.3.17-1, 0.3.28-1, 0.3.29-1, 0.3.30-1, 0.3.31-3, 0.3.32-1, 0.3.33-1, 0.3.8-1
- Fixed versions
- Not specified
- CVEs
- CVE-2020-35906
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:52 UTC · Revision 1
Source evidence
An issue was discovered in the futures-task crate before 0.3.6 for Rust. futures_task::waker may cause a use-after-free in a non-static type situation.
osv:UBUNTU-CVE-2020-35906
rust-futures-task
Fixed versions: Not specified
rust-futures-task
Fixed versions: Not specified
rust-futures-task
Fixed versions: Not specified
rust-futures-task
Fixed versions: Not specified
rust-futures-task
Fixed versions: Not specified
Complete source record
{
"id": "c102393eea4c0539814be7191255eabfbf42aa1b7b313b258a953c81d2138140",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2020-35906",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2020-35906",
"summary": "An issue was discovered in the futures-task crate before 0.3.6 for Rust. futures_task::waker may cause a use-after-free in a non-static type situation.",
"evidence": "osv:UBUNTU-CVE-2020-35906",
"products": [
{
"name": {
"value": "rust-futures-task",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.3.8-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.3.17-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "rust-futures-task",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.3.28-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.3.29-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.3.30-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "rust-futures-task",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.3.31-3",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "rust-futures-task",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.3.31-3",
"evidence": "/affected/3/versions"
},
{
"value": "0.3.32-1",
"evidence": "/affected/3/versions"
},
{
"value": "0.3.33-1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "rust-futures-task",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.3.31-3",
"evidence": "/affected/4/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2020-35906",
"aliases": [
"UBUNTU-CVE-2020-35906"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "low"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "rust-futures-task",
"purl": "pkg:deb/ubuntu/rust-futures-task?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"0.3.8-1",
"0.3.17-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35906.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "librust-futures-task-dev",
"binary_version": "0.3.17-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "rust-futures-task",
"purl": "pkg:deb/ubuntu/rust-futures-task?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"0.3.28-1",
"0.3.29-1",
"0.3.30-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35906.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "librust-futures-task-dev",
"binary_version": "0.3.30-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "rust-futures-task",
"purl": "pkg:deb/ubuntu/rust-futures-task?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"0.3.31-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35906.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "librust-futures-task-dev",
"binary_version": "0.3.31-3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "rust-futures-task",
"purl": "pkg:deb/ubuntu/rust-futures-task?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"0.3.31-3",
"0.3.32-1",
"0.3.33-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35906.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "librust-futures-task-dev",
"binary_version": "0.3.33-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "rust-futures-task",
"purl": "pkg:deb/ubuntu/rust-futures-task?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"0.3.31-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35906.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "librust-futures-task-dev",
"binary_version": "0.3.31-3"
}
]
}
}
],
"modified": "2026-10-17T12:56:14.263827671Z",
"provider": "osv",
"upstream": [
"CVE-2020-35906"
],
"references": [
"https://ubuntu.com/security/CVE-2020-35906",
"https://github.com/rust-lang/futures-rs/pull/2206",
"https://rustsec.org/advisories/RUSTSEC-2020-0060.html",
"https://www.cve.org/CVERecord?id=CVE-2020-35906"
]
},
"related_cves": [
{
"value": "CVE-2020-35906",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 354996,
"published_at": "2020-12-31T09:15:00+00:00"
}