SB2025110358 - Multiple vulnerabilities in libwebsockets

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Main Vulnerability Database SB2025110358

SB2025110358 - Multiple vulnerabilities in libwebsockets

Published: November 3, 2025

Security Bulletin ID SB2025110358
Severity
High
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 secuirty vulnerabilities.


1) Stack-based buffer overflow (CVE-ID: CVE-2025-11678)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the lws_adns_parse_label() function in lib/system/async-dns/async-dns-parse.c. A remote unauthenticated attacker can trigger a stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


2) Use-after-free (CVE-ID: CVE-2025-11677)

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a use-after-free error within the lws_handshake_server() function in lib/roles/http/server/server.c. A remote attacker can send specially crafted data to the application and perform a denial of service attack.



3) Out-of-bounds read (CVE-ID: CVE-2025-11679)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the lws_upng_emit_next_line() function in lib/misc/upng.c. A remote attacker can trigger an out-of-bounds read error and read contents of memory on the system.


4) Out-of-bounds write (CVE-ID: CVE-2025-11680)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error within the lws_upng_decode() function in lib/misc/upng.c. A remote attacker can trigger an out-of-bounds write and execute arbitrary code on the target system.


Remediation

Install update from vendor's website.

References