UBUNTU-CVE-2026-41565 (CVE-2026-41565)
Vulnerability from osv_ubuntu – Published: 2026-05-28 16:16 – Updated: 2026-06-03 11:23 – Source website
VLAI
Details
CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers. The gcm_decrypt_verify, ccm_decrypt_verify, chacha20poly1305_decrypt_verify and eax_decrypt_verify XS routines copied the caller-supplied authentication tag into a fixed 144-byte stack buffer (MAXBLOCKSIZE) without checking the supplied length. A longer tag overwrites the stack past the buffer. Version 0.088 added the clamp to gcm_decrypt_verify, and 0.088_001 added it to the other three. Any caller of an affected helper that forwards an attacker-controlled tag longer than the buffer can trigger the overflow.
Severity
7.5 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcryptx-perl",
"binary_version": "0.056-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "libcryptx-perl",
"purl": "pkg:deb/ubuntu/libcryptx-perl@0.056-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.055-1",
"0.056-1",
"0.056-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcryptx-perl",
"binary_version": "0.067-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "libcryptx-perl",
"purl": "pkg:deb/ubuntu/libcryptx-perl@0.067-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.064-1",
"0.064-1build1",
"0.066-1",
"0.067-1",
"0.067-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcryptx-perl",
"binary_version": "0.076-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "libcryptx-perl",
"purl": "pkg:deb/ubuntu/libcryptx-perl@0.076-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.069-1build1",
"0.073-1",
"0.074-1",
"0.075-1",
"0.076-1",
"0.076-1build1",
"0.076-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcryptx-perl",
"binary_version": "0.080-2ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "libcryptx-perl",
"purl": "pkg:deb/ubuntu/libcryptx-perl@0.080-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.078-1",
"0.080-1",
"0.080-2",
"0.080-2build1",
"0.080-2build2",
"0.080-2build3",
"0.080-2ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcryptx-perl",
"binary_version": "0.087-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "libcryptx-perl",
"purl": "pkg:deb/ubuntu/libcryptx-perl@0.087-1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.085-1",
"0.087-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcryptx-perl",
"binary_version": "0.087-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "libcryptx-perl",
"purl": "pkg:deb/ubuntu/libcryptx-perl@0.087-1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.087-1"
]
}
],
"aliases": [],
"details": "CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers. The gcm_decrypt_verify, ccm_decrypt_verify, chacha20poly1305_decrypt_verify and eax_decrypt_verify XS routines copied the caller-supplied authentication tag into a fixed 144-byte stack buffer (MAXBLOCKSIZE) without checking the supplied length. A longer tag overwrites the stack past the buffer. Version 0.088 added the clamp to gcm_decrypt_verify, and 0.088_001 added it to the other three. Any caller of an affected helper that forwards an attacker-controlled tag longer than the buffer can trigger the overflow.",
"id": "UBUNTU-CVE-2026-41565",
"modified": "2026-06-03T11:23:42Z",
"published": "2026-05-28T16:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-41565"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-41565"
},
{
"type": "REPORT",
"url": "https://lists.security.metacpan.org/cve-announce/msg/40477993/"
},
{
"type": "REPORT",
"url": "https://github.com/DCIT/perl-CryptX/commit/57e69e541b0718ca8724c2f61514322a2d859bc1.patch"
},
{
"type": "REPORT",
"url": "https://github.com/DCIT/perl-CryptX/commit/7e56347d420aaf43b2ee1586f4a230492ccf1642.patch"
},
{
"type": "REPORT",
"url": "https://metacpan.org/release/MIK/CryptX-0.088_001"
},
{
"type": "REPORT",
"url": "http://www.openwall.com/lists/oss-security/2026/05/28/10"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-41565"
]
}
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