CVE-2026-44983

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Source
https://cve.org/CVERecord?id=CVE-2026-44983
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44983.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-44983
Aliases
Downstream
Published
2026-05-26T21:38:13Z
Modified
2026-08-12T03:51:41Z
Severity
  • 7.3 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H CVSS Calculator
Summary
smallbitvec: Safe API Triggered Heap Buffer Overflow via Integer Overflow
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-122",
        "CWE-190"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44983.json"
}
References

Affected packages

Git / github.com/servo/smallbitvec

Affected ranges

Type
GIT
Repo
https://github.com/servo/smallbitvec
Events
Introduced
846aa866a0951bf000c8b3b821bb25472f913a90
Fixed
ad9b17eace931eb8190fa25f7775932ed48d370f
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "1.0.1"
        },
        {
            "fixed": "2.6.1"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v1.*
v1.0.1
v1.0.2
v1.0.3
v1.0.4
v1.0.5
v1.0.6
v1.0.7
v2.*
v2.0.0
v2.1.0
v2.1.1
v2.2.0
v2.3.0
v2.4.0
v2.5.0
v2.5.1
v2.5.2
v2.5.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44983.json"