CVE-2026-13466— Unit Confusion in VAB Authentication
Quick assessment
Affected
Altera Trusted Firmware
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Altera HPS 平台上的可信固件（Trusted Firmware）中存在缓冲区大小计算错误漏洞，可能导致缓冲区溢出。 该问题影响版本为 socfpga_v2.14.0 及之前版本的可信固件。
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I. Basic Information for CVE-2026-13466
Vulnerability Information
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Vulnerability Title
Unit Confusion in VAB Authentication
Source: CVE Program / CVE List V5
Vulnerability Description
Incorrect calculation of buffer size vulnerability in Altera Trusted Firmware on HPS allows Overflow Buffers.
This issue affects Trusted Firmware: through socfpga_v2.14.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区大小计算不正确
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Altera | Trusted Firmware | 0 ~ socfpga_v2.14.0 | - |
|
II. Public POCs for CVE-2026-13466
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-13466 (1)
Same Patch Batch · Altera · 2026-09-24 · 8 CVEs total
| CVE-2026-58007 | 8.1 HIGH | Unchecked SDM mailbox response address enables EL3 secure-memory corruption |
| CVE-2026-58008 | 8.1 HIGH | Unchecked HKDF key-size input in EL3 causes a stack buffer overflow |
| CVE-2026-58004 | 8.1 HIGH | Crafted oversized firmware image causes EL3 stack overflow during VAB authentication on Tr |
| CVE-2026-58005 | 8.1 HIGH | Unvalidated SiP v2 mailbox pointers allow non-secure EL1 access to arbitrary physical addr |
| CVE-2026-58006 | 8.1 HIGH | Altera SoCFPGA BL31 Mailbox Output Pointer Validation Enables EL3 Secure-Memory Corruption |
| CVE-2026-13465 | 8.1 HIGH | EL3 Stack Buffer Overflow in FCS HKDF Request |
| CVE-2026-13467 | 8.1 HIGH | Systemic Missing Address Validation in SiP SMC Handlers |
IV. Related Vulnerabilities
Same product: Trusted Firmware
-
CVE-2026-58008
Unchecked HKDF key-size input in EL3 causes a stack buffer o -
CVE-2026-58007
Unchecked SDM mailbox response address enables EL3 secure-me -
CVE-2026-58006
Altera SoCFPGA BL31 Mailbox Output Pointer Validation Enable -
CVE-2026-58005
Unvalidated SiP v2 mailbox pointers allow non-secure EL1 acc -
CVE-2026-58004
Crafted oversized firmware image causes EL3 stack overflow d
Same vendor: Altera
-
CVE-2026-58008
Unchecked HKDF key-size input in EL3 causes a stack buffer o -
CVE-2026-58007
Unchecked SDM mailbox response address enables EL3 secure-me -
CVE-2026-58006
Altera SoCFPGA BL31 Mailbox Output Pointer Validation Enable -
CVE-2026-58005
Unvalidated SiP v2 mailbox pointers allow non-secure EL1 acc -
CVE-2026-58004
Crafted oversized firmware image causes EL3 stack overflow d
Same weakness: CWE-131
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V. Comments for CVE-2026-13466
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