DEBIAN-CVE-2026-8463
Crypt::Argon2 versions from 0.017 before 0.031 for Perl perform a heap out-of-bounds read in argon2_verify on empty encoded input. The auto-detect form of argon2_verify passes encoded_len - 1 as the length argument to memchr without checking that encoded_len is non-zero. When the encoded string is empty, the size_t subtraction underflows to SIZE_MAX and memchr scans adjacent heap memory looking for a '$' separator byte. A caller that invokes argon2_verify against a stored hash that may legitimately be empty (for example a placeholder row or a NULL column materialised as an empty string) reads out-of-bounds heap memory, which can crash the process or leak the position of an adjacent '$' byte into subsequent parsing.
DEBIAN-CVE-2026-8463
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-8463
libcrypt-argon2-perl
Source reference: /affected/0/package/name
- Affected versions
- 0.013-1
Source reference:
/affected/0/versions0.020-1Source reference:
/affected/0/versions0.022-1Source reference:
/affected/0/versions0.026-1Source reference:
/affected/0/versions0.029-1Source reference:
/affected/0/versions0.030-1Source reference:
/affected/0/versions0.031-1Source reference:
/affected/0/versions0.032-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
libcrypt-argon2-perl
Source reference: /affected/1/package/name
- Affected versions
- 0.030-1
Source reference:
/affected/1/versions0.031-1Source reference:
/affected/1/versions0.032-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
libcrypt-argon2-perl
Source reference: /affected/2/package/name
- Affected versions
- 0.030-1
Source reference:
/affected/2/versions - Fixed versions
- 0.031-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libcrypt-argon2-perl",
"purl": "pkg:deb/debian/libcrypt-argon2-perl?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"0.013-1",
"0.020-1",
"0.022-1",
"0.026-1",
"0.029-1",
"0.030-1",
"0.031-1",
"0.032-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-8463.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libcrypt-argon2-perl",
"purl": "pkg:deb/debian/libcrypt-argon2-perl?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"0.030-1",
"0.031-1",
"0.032-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-8463.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.031-1"
}
]
}
],
"package": {
"name": "libcrypt-argon2-perl",
"purl": "pkg:deb/debian/libcrypt-argon2-perl?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.030-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-8463.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #58510 · Revision 1
- Added to Heist Feed
- Publisher date