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TI-2026-30120 Aliases CVE-2026-41565GHSA-4p3p-7392-hjw4

Stack-based buffer overflow in MIK CryptX

Priority LOW 39CWE-121Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00469 40th percentileScored 2026-11-07
Fix Fixed CryptX (MIK): 0.088_001

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MIKCryptXbefore 0.088_0010.088_001Patch availableCNA
  • CryptX VendorMIK Affected before 0.088_001 Fixed in 0.088_001 Patch available CNA

Remediation

  • Fix · CNA CryptX (MIK) Fixed in 0.088_001

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-41565
  2. 2026-10-03 Alias added: GHSA-4p3p-7392-hjw4
  3. 2026-10-25 EPSS moved to the below the 50th percentile
  4. 2026-10-25 Priority changed: MEDIUM → LOW

References

Patch 2

Other 1

  • TI-2025-27306 CryptX for Perl before version 0.065 contains a dependency that may be susceptible to… CVSS 3.1CRITICAL 9.8
  • TI-2025-27308 Perl CryptX before version 0.087 contains a dependency that may be susceptible to an… CVSS 3.1CRITICAL 9.8
  • TI-2026-07597 Crypt::ScryptKDF versions through 0.010 for Perl uses insecure random number source when… CVSS 3.1MEDIUM 4.8
  • TI-2026-11599 CryptX versions before 0.088_001 for Perl compare AEAD authentication tags in… CVSS 3.1LOW 3.7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences