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Critical USN-8128-1 3 CVEs

libcryptx-perl vulnerabilities

Published Mar 26, 2026 · Updated Apr 27, 2026

Summary

It was discovered that CryptX did not verify authentication tags while
performing GCM and ChaCha20-Poly1305 decryption. An attacker could possibly
use this issue to cause CryptX to accept modified ciphertext, leading to
data integrity violations or authentication bypass. This issue only
affected Ubuntu 18.04 LTS. (CVE-2018-25099)

It was discovered that CryptX included a version of the tomcrypt library
that was susceptible to malformed unicode handling. An attacker could
possibly use this issue to cause unexpected behavior or incorrect
processing of crafted input. This issue only affected Ubuntu 18.04 LTS.
(CVE-2025-40912)

It was discovered that CryptX included a version of the libtommath library
that was susceptible to an integer overflow. An attacker could possibly use
this issue to cause memory corruption or a denial of service.
(CVE-2025-40914)

Fixed packages 4

ReleasePackageFixed in
Ubuntu · Pro 18.04 LTS Pro:18.04:LTS libcryptx-perl 0.056-1ubuntu0.1~esm1
Ubuntu · Pro 20.04 LTS Pro:20.04:LTS libcryptx-perl 0.067-1ubuntu0.1~esm1
Ubuntu · Pro 22.04 LTS Pro:22.04:LTS libcryptx-perl 0.076-1ubuntu0.1~esm1
Ubuntu · Pro 24.04 LTS Pro:24.04:LTS libcryptx-perl 0.080-2ubuntu0.1~esm1

Vulnerabilities 3

  • Critical 9.8

    In the CryptX module before 0.062 for Perl, gcm_decrypt_verify() and chacha20poly1305_decrypt_verify() do not verify th…

  • Critical 9.8

    CryptX for Perl before version 0.065 contains a dependency that may be susceptible to malformed unicode

    CryptX for Perl before version 0.065 contains a dependency that may be susceptible to malformed unicode. CryptX embeds the tomcrypt library. The versions of that library in CryptX before 0.065 may be susceptible to CVE-2019-17362.

  • Critical 9.8

    Perl CryptX before version 0.087 contains a dependency that may be susceptible to an integer overflow

    Perl CryptX before version 0.087 contains a dependency that may be susceptible to an integer overflow. CryptX embeds a version of the libtommath library that is susceptible to an integer overflow associated with CVE-2023-36328.

References

  • report
    https://ubuntu.com/security/CVE-2018-25099
  • report
    https://ubuntu.com/security/CVE-2025-40912
  • report
    https://ubuntu.com/security/CVE-2025-40914