Latest vulnerabilities for "libwebsockets"

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libwebsocketsStack-based Buffer Overflow in libwebsockets DNS response parsing

Risk 68

Severity

7.5

Buffer Overflow

CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Stack-based Buffer Overflow in lwsadnsparselabel in warmcat libwebsockets allows, when the LWSWITHSYSASYNCDNS flag is enabled during compilation, to overflow the labelstack, when the attacker is able to sniff a DNS request in order to craft a response with a matching id containing a label longer than the maximum.

1 / 2

Source: Red Hat

Remedy

Update the library to its latest stable release, if not possible backport the fix commit 2bb9598562b37c942ba5b04bcde3f7fdf66a9d3a

First published (updated )

CVE-2025-11678

warmcat libwebsocketsUndefined Behavior Due to Out-of-Bounds Pointer Arithmetic in libwebsockets

Risk 87

Severity

Buffer Overflow

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows Pointer Manipulation, potentially leading to out-of-bounds memory access. This issue affects libwebsockets before 4.3.4 and is present in code built specifically for the Win32 platform.

By default, the affected code is not executed unless one of the following conditions is met:

LWSWITHOUTEXTENSIONS (default ON) is manually set to OFF in CMake. LWSWITHHTTPSTREAMCOMPRESSION (default OFF) is manually set to ON in CMake. Despite these conditions, when triggered in affected configurations, this vulnerability may allow attackers to manipulate pointers, potentially leading to memory corruption or unexpected behavior.

First published (updated )

CVE-2025-1866

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