CVE-2025-7844
LOWwolfTPM < 3.9.2 - Stack-based Buffer Overflow via RSA Key Export
Title source: llmDescription
Exporting a TPM based RSA key larger than 2048 bits from the TPM could overrun a stack buffer if the default `MAX_RSA_KEY_BITS=2048` is used. If your TPM 2.0 module supports RSA key sizes larger than 2048 bit and your applications supports creating or importing an RSA private or public key larger than 2048 bits and your application calls `wolfTPM2_RsaKey_TpmToWolf` on that key, then a stack buffer could be overrun. If the `MAX_RSA_KEY_BITS` build-time macro is set correctly (RSA bits match what TPM hardware is capable of) for the hardware target, then a stack overrun is not possible.
References (1)
Core 1
Core References
Issue Tracking
https://github.com/wolfSSL/wolfTPM/pull/427
Scores
CVSS v4
1.0
EPSS
0.0014
EPSS Percentile
3.4%
CVSS:4.0/AV:P/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/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:Green
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
total
Details
CWE
CWE-121
Status
published
Products (1)
wolfSSL Inc./wolfTPM
< 3.9.2
Published
Aug 04, 2025
Tracked Since
Feb 18, 2026