PT-2026-44386 · Cryptx · Cryptx

Karel Miko · Published 2026-05-28 · Updated 2026-06-10 · CVE-2026-41565

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions CryptX versions prior to 0.088 001

Description A stack buffer overflow exists in four AEAD decrypt verify helpers. The XS routines gcm decrypt verify(), ccm decrypt verify(), chacha20poly1305 decrypt verify(), and eax decrypt verify() copy a caller-supplied authentication tag into a fixed 144-byte stack buffer (MAXBLOCKSIZE) without verifying the length. An attacker-controlled tag exceeding this length can overwrite the stack beyond the buffer.

Recommendations Update to version 0.088 001 or later.

Exploit

Fix

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

CVE-2026-41565

OPENSUSE-SU-2026:10968-1

OPENSUSE-SU-2026:20936-1

Affected Products

Cryptx

References · 25

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41565.json · Exploit
• https://github.com/DCIT/perl-CryptX/commit/57e69e541b0718ca8724c2f61514322a2d859bc1.patch · Patch
• https://github.com/DCIT/perl-CryptX/commit/7e56347d420aaf43b2ee1586f4a230492ccf1642.patch · Patch
• https://osv.dev/vulnerability/openSUSE-SU-2026:20936-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-41565 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-41565 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10968-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-41565 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-41565 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-41565 · Security Note
• https://osv.dev/vulnerability/CVE-2026-41565 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-41565 · Vendor Advisory
• https://github.com/DCIT/perl-CryptX · Note
• http://openwall.com/lists/oss-security/2026/05/28/10 · Note
• https://bugzilla.suse.com/1266804 · Note