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.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1834 advisory.

    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. (CVE-2026-41565)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20936-1 advisory.

    Changes in perl-CryptX:

    - updated to 0.89.0 (0.089)        see /usr/share/doc/packages/perl-CryptX/Changes

      0.089   2026-05-10
              - new: Crypt::ASN1
              - new: Crypt::AuthEnc::SIV
              - new: Crypt::AuthEnc::XChaCha20Poly1305
              - new: Crypt::Cipher::SM4
              - new: Crypt::Digest::TurboSHAKE
              - new: Crypt::Digest::KangarooTwelve
              - new: Crypt::PK::Ed448
              - new: Crypt::PK::X448
              - new: Crypt::Stream::XChaCha
              - new: Crypt::Stream::XSalsa20
              - Crypt::PK::Ed25519 - new functions: sign_message_ctx, verify_message_ctx, sign_message_ph,     verify_message_ph
              - Crypt::Digest: object digest accessors now finalize the object; use reset() before reuse
              - Crypt::Mac + Crypt::AuthEnc: finalized-object lifecycle is now enforced consistently
              - security/hardening fixes across Digest/Mac/AuthEnc/Mode/Stream/PK/PRNG
              - fixes related to wycheproof test suite
              - documentation cleanup & improvements
              - support for RFC 8702 RSA-PSS-SHAKE128/256 and ECDSA-SHAKE128/256
              - support for FRP256v1 elliptic-curve
              - bundled libtomcrypt update branch:develop (commit: 8b5af49b 2026-05-06)
              - CVE-2026-41565 bsc#1266804

      0.088   2026-04-23
              - Crypt::KeyDerivation - new functions: pbkdf1_openssl, bcrypt_pbkdf, scrypt_pbkdf, argon2_pbkdf
              - Crypt::Misc - new functions: random_v7uuid, is_uuid
              - bundled libtomcrypt update branch:develop (commit: 2e441a17 2026-04-15)
              - bundled libtommath update branch:develop (commit: ae40a87 2026-04-20)
              - security fix CVE-2026-41564 https://github.com/DCIT/perl-     CryptX/security/advisories/GHSA-24c2-gp6c-24c6                 bsc#1262697
              - CVE-2026-41565 bsc#1266804

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-2ef4c0c642 advisory.

    Fixes CVE-2026-41565

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-2158c96917 advisory.

    Fixes CVE-2026-41565

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-41565)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
322012	Amazon Linux 2023 : perl-CryptX, perl-CryptX-tests (ALAS2023-2026-1834)	Nessus	Amazon Linux Local Security Checks	high
320994	openSUSE 16 Security Update : perl-CryptX (openSUSE-SU-2026:20936-1)	Nessus	SuSE Local Security Checks	high
319619	Fedora 43 : perl-CryptX (2026-2ef4c0c642)	Nessus	Fedora Local Security Checks	high
319617	Fedora 44 : perl-CryptX (2026-2158c96917)	Nessus	Fedora Local Security Checks	high
317647	Linux Distros Unpatched Vulnerability : CVE-2026-41565	Nessus	Misc.	high

Detections

Analytics

CVE-2026-41565

high

Tenable Plugins

high

high

high

high

high