Vulnerability · Published Jul 10, 2026 · Assigned by GitHub_M
CVE-2026-55687ESF-IDF: Stack-Based Out-of-Bounds Write in JPEG Decoder DQT Marker Parsing
High 7.5
In plain English
A high-severity stack buffer overflow in esp-idf from espressif. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).
Official description
ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. Versions 6.0.1, 5.5.4, 5.4.4, 5.3.5, and possibly prior contain an out-of-bounds write in jpeg_parse_dqt_marker() in components/esp_driver_jpeg/jpeg_parse_marker.c because the attacker-controlled DQT marker Tq nibble is used as an index into the qt_tbl array without validating that it is in the range 0..3, allowing malformed JPEG input to corrupt stack memory and reliably trigger a denial of service. This issue is fixed in version 6.0.2 and is expected to be fixed in versions 5.5.5, 5.4.5, and 5.3.6.
Affected products (as reported)
Weakness: CWE-121, CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/espressif/esp-idf/security/advisories/GHSA-v6r2-f6p2-88cj x_refsource_CONFIRM
- https://github.com/espressif/esp-idf/commit/303c01305acb8ae5c4eb24a1786300681b4822a4 x_refsource_MISC
- https://github.com/espressif/esp-idf/commit/6ffafe8e93142ef8ffe51a6311d4abfc0f10fe77 x_refsource_MISC
- https://github.com/espressif/esp-idf/commit/7ccfc00f39faf1b7e5919f45b56fe44ba699d7c1 x_refsource_MISC
- https://github.com/espressif/esp-idf/commit/82c5c2dad45313786fb7e973059bc9094d95c3b2 x_refsource_MISC
- https://github.com/espressif/esp-idf/commit/f2df45bcedef11354e83c31a9718d680a68422c4 x_refsource_MISC
- https://github.com/espressif/esp-idf/releases/tag/v6.0.2 x_refsource_MISC