Security readout for executives and security teams
Plain-English summary
CVE-2026-22027 affects NASA CryptoLib before 1.4.3. A malformed or oversized hex string in MariaDB security association data can cause a heap buffer overflow during import. This could corrupt memory and affect integrity or availability, but the CVSS vector indicates high privileges and local access are required.
Executive priority
Treat as a targeted remediation item for spacecraft or ground-station environments using CryptoLib with MariaDB-backed security associations. It is not described as remotely exploitable or actively exploited, but affected mission systems should be updated promptly because memory corruption can impact availability and integrity.
Technical view
The vulnerable function is convert_hexstring_to_byte_array() in the MariaDB SA interface. Before 1.4.3, it writes decoded bytes into a caller-provided buffer without checking capacity. Oversized SA fields such as IV, ARSN, or ABM can overflow heap memory. The issue is classified as CWE-122 and has a CVSS 4.0 score of 5.7.
Likely exposure
Exposure is limited to deployments using NASA CryptoLib versions before 1.4.3 with the MariaDB SA interface. The attacker must be able to influence relevant database-backed SA hex fields and has high privilege requirements per the CVSS vector.
Exploitation context
No active exploitation is stated in the provided sources, and the CVE is not listed as KEV. Practical exploitation appears constrained by local access, high privileges, and the need for malformed database content, but successful abuse may corrupt heap memory and affect availability or integrity.
Researcher notes
Evidence comes from the CVE record and NASA GitHub advisory, commit, and v1.4.3 release. The public description names the vulnerable function and database fields but does not provide broader product exposure details. Avoid assuming impact beyond CryptoLib before 1.4.3 and the MariaDB SA import path.
Mitigation direction
- Upgrade NASA CryptoLib to version 1.4.3 or later.
- Review vendor advisory and release notes before deploying the update.
- Restrict write access to MariaDB SA fields to trusted administrators only.
- Monitor vendor guidance for any additional hardening recommendations.
Validation and detection
- Inventory systems using NASA CryptoLib and identify installed versions.
- Confirm whether the MariaDB SA interface is enabled or used.
- Verify affected deployments are upgraded to CryptoLib 1.4.3 or later.
- Review database permissions around SA fields such as IV, ARSN, and ABM.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-122: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-22027 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.7 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
5.7MediumVector: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/nasa/CryptoLib/security/advisories/GHSA-3m35-m689-h29xCVE reference · x_refsource_CONFIRM
- https://github.com/nasa/CryptoLib/commit/2372efd3da1ccb226b4297222e25f41ecc84821dCVE reference · x_refsource_MISC
- https://github.com/nasa/CryptoLib/releases/tag/v1.4.3CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Heap-based Buffer Overflow
Heap-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.