CVE-2025-12829
Amazon / Amazon.com, Inc. · published 2025-11-07
Source record Collected from the National Vulnerability Database (NVD)
Description
Description by AMZN via the CVE Program.
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.
Filed by AMZN; not a statement by Amazon / Amazon.com, Inc..
Status at the source
- NVD status: Deferred — NVD has not analysed this CVE.
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| Amazon | Ion-C | 1.1.4: unaffected |
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 4.0: 6.9 MEDIUM — as published by AMZN (Secondary)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1: 6.2 MEDIUM — as published by AMZN (Secondary)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: none · Automatable: no · Technical impact: partial
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- https://aws.amazon.com/security/security-bulletins/AWS-2025-027/
- https://github.com/amazon-ion/ion-c/releases/tag/v1.1.4
- https://github.com/amazon-ion/ion-c/security/advisories/GHSA-7mgf-6x73-5h7r
Source dates: published 2025-11-07, last changed 2026-10-07. DeSpy's copy of this version is dated 2026-10-07.
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