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DEBIAN-CVE-2026-41565

Type: advisorySource: OSV1 source record

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.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-41565

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-2026-41565

libcryptx-perl

Source reference: /affected/0/package/name

Affected versions
0.077-1

Source reference: /affected/0/versions

0.078-1

Source reference: /affected/0/versions

0.080-1

Source reference: /affected/0/versions

0.080-2

Source reference: /affected/0/versions

0.081-1

Source reference: /affected/0/versions

0.081-2

Source reference: /affected/0/versions

0.082-1

Source reference: /affected/0/versions

0.082.001-1

Source reference: /affected/0/versions

0.084-1

Source reference: /affected/0/versions

0.085-1

Source reference: /affected/0/versions

0.087-1

Source reference: /affected/0/versions

0.087-2

Source reference: /affected/0/versions

0.088-1

Source reference: /affected/0/versions

0.089-1

Source reference: /affected/0/versions

0.090-1

Source reference: /affected/0/versions

0.090-1~bpo13+1

Source reference: /affected/0/versions

0.091-1

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

libcryptx-perl

Source reference: /affected/1/package/name

Affected versions
0.085-1

Source reference: /affected/1/versions

0.085-1+deb13u1

Source reference: /affected/1/versions

0.087-1

Source reference: /affected/1/versions

0.087-2

Source reference: /affected/1/versions

0.088-1

Source reference: /affected/1/versions

0.089-1

Source reference: /affected/1/versions

0.090-1

Source reference: /affected/1/versions

0.090-1~bpo13+1

Source reference: /affected/1/versions

0.091-1

Source reference: /affected/1/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

libcryptx-perl

Source reference: /affected/2/package/name

Affected versions
0.085-1

Source reference: /affected/2/versions

0.087-1

Source reference: /affected/2/versions

0.087-2

Source reference: /affected/2/versions

0.088-1

Source reference: /affected/2/versions

Fixed versions
0.089-1

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": "libcryptx-perl",
      "purl": "pkg:deb/debian/libcryptx-perl?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "0.077-1",
      "0.078-1",
      "0.080-1",
      "0.080-2",
      "0.081-1",
      "0.081-2",
      "0.082-1",
      "0.082.001-1",
      "0.084-1",
      "0.085-1",
      "0.087-1",
      "0.087-2",
      "0.088-1",
      "0.089-1",
      "0.090-1",
      "0.090-1~bpo13+1",
      "0.091-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-41565.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "libcryptx-perl",
      "purl": "pkg:deb/debian/libcryptx-perl?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "0.085-1",
      "0.085-1+deb13u1",
      "0.087-1",
      "0.087-2",
      "0.088-1",
      "0.089-1",
      "0.090-1",
      "0.090-1~bpo13+1",
      "0.091-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-41565.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0.089-1"
          }
        ]
      }
    ],
    "package": {
      "name": "libcryptx-perl",
      "purl": "pkg:deb/debian/libcryptx-perl?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "0.085-1",
      "0.087-1",
      "0.087-2",
      "0.088-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-41565.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56915 · Revision 1
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Publisher date
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