CVE-2026-55687

HIGH 7.5

ESF-IDF: Stack-Based Out-of-Bounds Write in JPEG Decoder DQT Marker Parsing

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-121 CWE-787
Vendor	espressif
Product	esp-idf
Published	Jul 10, 2026
Last Updated	Jul 10, 2026

Stay Ahead of the Next One

Get instant alerts for espressif esp-idf

Be the first to know when new high vulnerabilities affecting espressif esp-idf are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

espressif / esp-idf

>= 6.0.0, < 6.0.2 >= 5.5.0, <= 5.5.4 >= 5.4.0, <= 5.4.4 <= 5.3.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/espressif/esp-idf/security/advisories/GHSA-v6r2-f6p2-88cj github.com: https://github.com/espressif/esp-idf/commit/303c01305acb8ae5c4eb24a1786300681b4822a4 github.com: https://github.com/espressif/esp-idf/commit/6ffafe8e93142ef8ffe51a6311d4abfc0f10fe77 github.com: https://github.com/espressif/esp-idf/commit/7ccfc00f39faf1b7e5919f45b56fe44ba699d7c1 github.com: https://github.com/espressif/esp-idf/commit/82c5c2dad45313786fb7e973059bc9094d95c3b2 github.com: https://github.com/espressif/esp-idf/commit/f2df45bcedef11354e83c31a9718d680a68422c4 github.com: https://github.com/espressif/esp-idf/releases/tag/v6.0.2