Critical
Security advisory
crossbeam-deque is a package of work-stealing deques for building task schedulers when programming in Rust. In versions prior to 0.7.4 and 0.8.0, the result of the race condition is that one or more tasks in the worker queue can be popped twice instead of other tasks that are forgotten and never popped. If tasks are allocated on the heap, this can cause double free and a memory leak. If not, this still can cause a logical bug. Crates using `Stealer::steal`, `Stealer::steal_batch`, or `Stealer::steal_batch_and_pop` are affected by this issue. This has been fixed in crossbeam-deque 0.8.1 and 0.7.4.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-32810
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:17 UTC · Revision 1
Source evidence
crossbeam-deque is a package of work-stealing deques for building task schedulers when programming in Rust. In versions prior to 0.7.4 and 0.8.0, the result of the race condition is that one or more tasks in the worker queue can be popped twice instead of other tasks that are forgotten and never popped. If tasks are allocated on the heap, this can cause double free and a memory leak. If not, this still can cause a logical bug. Crates using `Stealer::steal`, `Stealer::steal_batch`, or `Stealer::steal_batch_and_pop` are affected by this issue. This has been fixed in crossbeam-deque 0.8.1 and 0.7.4.
osv:CVE-2021-32810
Complete source record
{
"id": "bf24e2731f86cc3fc86f70a9647e947ad4f01ec3ce4193c6102a160a17d454f1",
"url": "https://osv.dev/vulnerability/CVE-2021-32810",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-32810",
"summary": "crossbeam-deque is a package of work-stealing deques for building task schedulers when programming in Rust. In versions prior to 0.7.4 and 0.8.0, the result of the race condition is that one or more tasks in the worker queue can be popped twice instead of other tasks that are forgotten and never popped. If tasks are allocated on the heap, this can cause double free and a memory leak. If not, this still can cause a logical bug. Crates using `Stealer::steal`, `Stealer::steal_batch`, or `Stealer::steal_batch_and_pop` are affected by this issue. This has been fixed in crossbeam-deque 0.8.1 and 0.7.4.",
"evidence": "osv:CVE-2021-32810",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2021-32810",
"aliases": [
"CVE-2021-32810",
"GHSA-pqqp-xmhj-wgcw",
"RUSTSEC-2021-0093"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/crossbeam-rs/crossbeam",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "048513769238eda1876bcc61b131b2ece32f87dd"
},
{
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},
{
"fixed": "99c3230b263202aca56497b1f8e418a7b3647a23"
}
],
"database_specific": {
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{
"cpe": "cpe:2.3:a:crossbeam_project:crossbeam:*:*:*:*:*:*:*:*",
"range": [
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},
{
"fixed": "0.7.4"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:crossbeam_project:crossbeam:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0.8.0"
},
{
"fixed": "0.8.1"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
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"crossbeam-utils-0.8.0",
"crossbeam-queue-0.3.0",
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"crossbeam-channel-0.5.0",
"crossbeam-0.8.0",
"crossbeam-queue-0.2.3",
"crossbeam-utils-0.7.2",
"crossbeam-epoch-0.8.2",
"crossbeam-channel-0.4.2",
"crossbeam-queue-0.2.1",
"crossbeam-utils-0.7.0",
"crossbeam-queue-0.2.0",
"crossbeam-epoch-0.8.0",
"crossbeam-deque-0.7.2",
"crossbeam-channel-0.4.0",
"crossbeam-0.7.3",
"crossbeam-0.7.2",
"crossbeam-channel-0.3.9",
"crossbeam-epoch-0.7.2",
"crossbeam-utils-0.6.6",
"crossbeam-queue-0.1.2",
"crossbeam-deque-0.7.1",
"crossbeam-channel-0.3.8",
"crossbeam-queue-0.1.1",
"crossbeam-utils-0.6.5",
"crossbeam-0.7.1",
"crossbeam-utils-0.6.4",
"crossbeam-queue-0.1.0",
"crossbeam-epoch-0.7.1",
"crossbeam-deque-0.7.0",
"crossbeam-channel-0.3.7",
"crossbeam-0.7.0",
"crossbeam-channel-0.3.6",
"crossbeam-channel-0.3.5",
"crossbeam-epoch-0.7.0",
"crossbeam-deque-0.6.3",
"crossbeam-channel-0.3.4",
"crossbeam-0.6.0",
"crossbeam-utils-0.6.3",
"crossbeam-channel-0.3.3",
"crossbeam-utils-0.6.2",
"crossbeam-channel-0.3.2",
"crossbeam-utils-0.6.1",
"crossbeam-0.5.0",
"crossbeam-utils-0.6.0",
"crossbeam-epoch-0.6.1",
"crossbeam-deque-0.6.2",
"crossbeam-channel-0.3.1",
"v0.4.1",
"v0.4.0",
"v0.3.2",
"v0.3.1",
"v0.3.0",
"0.2.10"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-32810.json"
}
}
],
"modified": "2026-10-20T10:53:45.957705636Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EZILHZDRGDPOBQ4KTW3E5PPMKLHGH5N/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AWHNNBJCU4EHA2X5ZAMJMGLDUYS5FEPP/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AYBSLIYFANZLCYWOGTIYZUM26TJRH7WU/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CY5T3FCE4MUYSPKEWICLVJBBODGJ6SZE/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EW5B2VTDVMJ6B3DA4VLMAMW2GGDCE2BK/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LCIBFGBSL3JSVJQTNEDEIMZGZF23N2KE/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OCLMH7B7B2MF55ET4NQNPH7JWISFX4RT/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RRPKBRXCRNGNMVFQPFD4LM3QKPEMBQQR/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TFUBWBYCPSSXTJGEAQ67CJUNQJBOCM26/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3LSN3B43TJSFIOB3QLPBI3RCHRU5BLO/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VQZIEJQBV3S72BHD5GKJQF3NVYNRV5CF/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WGB2H35CTZDHOV3VLC5BM6VFGURLLVRP/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XFBZWCLG7AGLJO4A7K5IMJVPLSWZ5TJP/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQDIBB7VR3ER52FMSMNJPAWNDO5SITCE/",
"https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-pqqp-xmhj-wgcw"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "34"
},
{
"last_affected": "34"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2021-32810",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 384597,
"published_at": "2021-08-02T19:15:08.28+00:00"
}