UBUNTU-CVE-2026-8463

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Source
https://ubuntu.com/security/CVE-2026-8463
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8463.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-8463
Upstream
  • CVE-2026-8463
Published
2026-05-13T14:18:00Z
Modified
2026-05-20T22:03:08.532534345Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Crypt::Argon2 versions from 0.017 before 0.031 for Perl perform a heap out-of-bounds read in argon2verify on empty encoded input. The auto-detect form of argon2verify passes encodedlen - 1 as the length argument to memchr without checking that encodedlen is non-zero. When the encoded string is empty, the sizet subtraction underflows to SIZEMAX 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.

References

Affected packages

Ubuntu:24.04:LTS / libcrypt-argon2-perl

Package

Name
libcrypt-argon2-perl
Purl
pkg:deb/ubuntu/libcrypt-argon2-perl?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.013-1
0.020-1
0.020-1build1
0.020-1build2
0.020-1build3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libcrypt-argon2-perl",
            "binary_version": "0.020-1build3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8463.json"

Ubuntu:25.10 / libcrypt-argon2-perl

Package

Name
libcrypt-argon2-perl
Purl
pkg:deb/ubuntu/libcrypt-argon2-perl?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.029-1build1
0.030-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libcrypt-argon2-perl",
            "binary_version": "0.030-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8463.json"

Ubuntu:26.04:LTS / libcrypt-argon2-perl

Package

Name
libcrypt-argon2-perl
Purl
pkg:deb/ubuntu/libcrypt-argon2-perl?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.030-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libcrypt-argon2-perl",
            "binary_version": "0.030-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8463.json"