High
rust-smallbitvec — security advisory
smallbitvec is a growable bit-vector for Rust, optimized for size. From 1.0.1 to 2.6.0, an integer overflow in the internal capacity calculation of smallbitvec can lead to an undersized heap allocation, resulting in a heap buffer overflow through safe APIs only. This allows memory corruption without requiring unsafe code from the caller. This vulnerability is fixed in 2.6.1.
- Products
- rust-smallbitvec
- Affected versions
- 2.5.1-1, 2.5.1-1build1, 2.6.1-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-44983
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:13 UTC · Revision 1
Source evidence
smallbitvec is a growable bit-vector for Rust, optimized for size. From 1.0.1 to 2.6.0, an integer overflow in the internal capacity calculation of smallbitvec can lead to an undersized heap allocation, resulting in a heap buffer overflow through safe APIs only. This allows memory corruption without requiring unsafe code from the caller. This vulnerability is fixed in 2.6.1.
osv:UBUNTU-CVE-2026-44983
rust-smallbitvec
Fixed versions: Not specified
rust-smallbitvec
Fixed versions: Not specified
rust-smallbitvec
Fixed versions: Not specified
rust-smallbitvec
Fixed versions: Not specified
rust-smallbitvec
Fixed versions: Not specified
Complete source record
{
"id": "e8a8cf22b9c999956ed6adae3fd32672d577044c3cad36afd5ae2e8d11caece2",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-44983",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-44983",
"summary": "smallbitvec is a growable bit-vector for Rust, optimized for size. From 1.0.1 to 2.6.0, an integer overflow in the internal capacity calculation of smallbitvec can lead to an undersized heap allocation, resulting in a heap buffer overflow through safe APIs only. This allows memory corruption without requiring unsafe code from the caller. This vulnerability is fixed in 2.6.1.",
"evidence": "osv:UBUNTU-CVE-2026-44983",
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"modified": "2026-10-17T12:58:22.660328303Z",
"provider": "osv",
"upstream": [
"CVE-2026-44983"
],
"references": [
"https://ubuntu.com/security/CVE-2026-44983",
"https://www.cve.org/CVERecord?id=CVE-2026-44983",
"https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr"
]
},
"related_cves": [
{
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"evidence": "/upstream"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 358624,
"published_at": "2026-05-26T22:16:00+00:00"
}