CVE-2025-12829

MEDIUM
6.2
CVSS Score
Published: November 7, 2025 at 06:04 PM UTC
Updated: October 7, 2026 at 09:10 PM UTC
Products not identified yet

Using Ion-C by Amazon?

Get instant alerts when new vulnerabilities affect Ion-C - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
MEDIUM6.2
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

An uninitialized stack read issue exists in Amazon Ion-C versions <v1.1.4 that may allow a threat actor to craft data and serialize it to Ion text in such a way that sensitive data in memory could be exposed through UTF-8 escape sequences. To mitigate this issue, users should upgrade to version v1.1.4.

Affected

We have no canonical product record for this CVE. The source names may not have matched any product.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

Vendor Advisory
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
https://aws.amazon.com/security/security-bulletins/AWS-2025-027/
Patch
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
https://github.com/amazon-ion/ion-c/releases/tag/v1.1.4
Vendor Advisory
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
https://github.com/amazon-ion/ion-c/security/advisories/GHSA-7mgf-6x73-5h7r

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.2MEDIUMAMZN
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-125

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card