ubuntu-cve-2026-41678
Vulnerability from osv_ubuntu
Published
2026-04-24 18:16
Modified
2026-05-20 15:27
Summary
Details
rust-openssl provides OpenSSL bindings for the Rust programming language. From to before 0.10.78, aes::unwrap_key() contains an incorrect assertion: it checks that out.len() + 8 <= in_.len(), but this condition is reversed. The intended invariant is out.len() >= in_.len() - 8, ensuring the output buffer is large enough. Because of the inverted check, the function only accepts buffers at or below the minimum required size and rejects larger ones. If a smaller buffer is provided the function will write past the end of out by in_.len() - 8 - out.len() bytes, causing an out-of-bounds write from a safe public function. This vulnerability is fixed in 0.10.78.
Severity
9.8 (Critical)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "librust-openssl-dev",
"binary_version": "0.10.36-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "rust-openssl",
"purl": "pkg:deb/ubuntu/rust-openssl@0.10.36-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.10.29-1",
"0.10.36-1",
"0.10.36-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "librust-openssl-dev",
"binary_version": "0.10.57-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "rust-openssl",
"purl": "pkg:deb/ubuntu/rust-openssl@0.10.57-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.10.45-1",
"0.10.57-1",
"0.10.57-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "librust-openssl-dev",
"binary_version": "0.10.72-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "rust-openssl",
"purl": "pkg:deb/ubuntu/rust-openssl@0.10.72-1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.10.70-1",
"0.10.72-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "librust-openssl-dev",
"binary_version": "0.10.73-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "rust-openssl",
"purl": "pkg:deb/ubuntu/rust-openssl@0.10.73-1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.10.72-1",
"0.10.73-1"
]
}
],
"aliases": [],
"details": "rust-openssl provides OpenSSL bindings for the Rust programming language. From to before 0.10.78, aes::unwrap_key() contains an incorrect assertion: it checks that out.len() + 8 \u003c= in_.len(), but this condition is reversed. The intended invariant is out.len() \u003e= in_.len() - 8, ensuring the output buffer is large enough. Because of the inverted check, the function only accepts buffers at or below the minimum required size and rejects larger ones. If a smaller buffer is provided the function will write past the end of out by in_.len() - 8 - out.len() bytes, causing an out-of-bounds write from a safe public function. This vulnerability is fixed in 0.10.78.",
"id": "UBUNTU-CVE-2026-41678",
"modified": "2026-05-20T15:27:27Z",
"published": "2026-04-24T18:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-41678"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-41678"
},
{
"type": "REPORT",
"url": "https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-8c75-8mhr-p7r9"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U",
"type": "CVSS_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-41678"
]
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
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