CVE-2026-88388: n/a
Espruino 2v29 (commit bffc6d0) contains a stack-based buffer overflow vulnerability in the JavaScript error stack-trace handling path on 64-bit builds. A remote attacker can supply JavaScript input that triggers an exception and reaches jslPrintTokenLineMarker(), which passes the address of a 4-byte int column variable to jsvGetLineAndCol() as a size_t pointer. jsvGetLineAndCol() performs an 8-byte write through the mismatched pointer, overwriting adjacent stack memory.
AI Analysis
Technical Summary
CVE-2026-88388 describes a stack-based buffer overflow in Espruino 2v29 (commit bffc6d0) affecting 64-bit builds. The vulnerability occurs in the JavaScript error stack-trace handling path. Specifically, when an exception triggers jslPrintTokenLineMarker(), it passes the address of a 4-byte int column variable as a size_t pointer to jsvGetLineAndCol(). jsvGetLineAndCol() then performs an 8-byte write through this pointer, leading to an overwrite of adjacent stack memory. This mismatch in pointer size and write length causes the buffer overflow condition.
Potential Impact
The vulnerability allows a remote attacker to supply crafted JavaScript input that triggers the overflow, potentially leading to memory corruption on the stack. This could result in undefined behavior including crashes or code execution. However, no known exploits are reported in the wild at this time.
Mitigation Recommendations
No patch or remediation information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
CVE-2026-88388: n/a
Description
Espruino 2v29 (commit bffc6d0) contains a stack-based buffer overflow vulnerability in the JavaScript error stack-trace handling path on 64-bit builds. A remote attacker can supply JavaScript input that triggers an exception and reaches jslPrintTokenLineMarker(), which passes the address of a 4-byte int column variable to jsvGetLineAndCol() as a size_t pointer. jsvGetLineAndCol() performs an 8-byte write through the mismatched pointer, overwriting adjacent stack memory.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-88388 describes a stack-based buffer overflow in Espruino 2v29 (commit bffc6d0) affecting 64-bit builds. The vulnerability occurs in the JavaScript error stack-trace handling path. Specifically, when an exception triggers jslPrintTokenLineMarker(), it passes the address of a 4-byte int column variable as a size_t pointer to jsvGetLineAndCol(). jsvGetLineAndCol() then performs an 8-byte write through this pointer, leading to an overwrite of adjacent stack memory. This mismatch in pointer size and write length causes the buffer overflow condition.
Potential Impact
The vulnerability allows a remote attacker to supply crafted JavaScript input that triggers the overflow, potentially leading to memory corruption on the stack. This could result in undefined behavior including crashes or code execution. However, no known exploits are reported in the wild at this time.
Mitigation Recommendations
No patch or remediation information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-09-10T00:00:00.000Z
- State
- PUBLISHED
Threat ID: 6ab59082f7a7c54106d840e3
Added to database: 09/24/2026, 21:05:06 UTC
Last enriched: 09/24/2026, 21:17:56 UTC
Last updated: 09/25/2026, 01:59:16 UTC
Views: 6
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