SB2026052152 - Multiple vulnerabilities in ESP-IDF

Description

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds read (CVE-ID: CVE-2026-45160)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to out-of-bounds read in parse_options() in components/lwip/apps/dhcpserver/dhcpserver.c when parsing crafted DHCP requests. A remote attacker can send a specially crafted DHCP broadcast request to cause a denial of service.

The issue affects devices running the DHCP server on a local network, including SoftAP deployments.

2) Stack-based buffer overflow (CVE-ID: CVE-2026-55687)

CWE-ID: CWE-121 - Stack-based buffer overflow

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to stack-based buffer overflow in the JPEG decoder header parser when parsing a crafted DQT marker in a JPEG file. A remote attacker can supply a specially crafted JPEG image to cause a denial of service.

Code execution may be possible on builds without strong stack protection, but this has not been demonstrated.

Remediation

Install update from vendor's website.

References

• https://github.com/espressif/esp-idf/security/advisories/GHSA-g764-gwc3-75m5
• https://github.com/espressif/esp-idf/commit/8b4b5d5301815198d177974ffc24848f47748248
• https://github.com/espressif/esp-idf/security/advisories/GHSA-v6r2-f6p2-88cj
• https://github.com/espressif/esp-idf/commit/6ffafe8e93142ef8ffe51a6311d4abfc0f10fe77