EUVD-2025-35057

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...

Out-of-bounds Read

Overview Affected versions of this package are vulnerable to Out-of-bounds Read via the lwsupngemitnextline function when the LWSWITHUPNG flag is enabled during compilation and the HTML display stack is used. An attacker can cause a crash or read past a heap-allocated buffer by enticing a user to...

CVE-2025-11680

Out-of-bounds Write in unfilterscanline in warmcat libwebsockets allows, when the LWSWITHUPNG flag is enabled during compilation and the HTML display stack is used, to write past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a...

DEBIAN-CVE-2025-11677

Use After Free in WebSocket server implementation in lwshandshakeserver in warmcat libwebsockets may allow an attacker, in specific configurations where the user provides a callback function that handles LWSCALLBACKHTTPCONFIRMUPGRADE, to achieve denial of service...

UBUNTU-CVE-2025-11678

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...

UBUNTU-CVE-2025-11677

Use After Free in WebSocket server implementation in lwshandshakeserver in warmcat libwebsockets may allow an attacker, in specific configurations where the user provides a callback function that handles LWSCALLBACKHTTPCONFIRMUPGRADE, to achieve denial of service...

UBUNTU-CVE-2025-11679

Out-of-bounds Read in lwsupngemitnextline in warmcat libwebsockets allows, when the LWSWITHUPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a...

UBUNTU-CVE-2025-11680

Out-of-bounds Write in unfilterscanline in warmcat libwebsockets allows, when the LWSWITHUPNG flag is enabled during compilation and the HTML display stack is used, to write past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a...

CVE-2025-11680

CVE-2025-11680 affects libwebsockets’ unfilter_scanline in the warmcat library. When compiled with LWS_WITH_UPNG and the HTML display stack is used, a crafted PNG with a large width can trigger an integer overflow that determines the size of a heap allocation, enabling an out-of-bounds write and ...

CVE-2025-11680

Out-of-bounds Write in unfilterscanline in warmcat libwebsockets allows, when the LWSWITHUPNG flag is enabled during compilation and the HTML display stack is used, to write past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a...

CVE-2025-11680 Out-of-bounds Write in libwebsockets PNG parsing

Out-of-bounds Write in unfilterscanline in warmcat libwebsockets allows, when the LWSWITHUPNG flag is enabled during compilation and the HTML display stack is used, to write past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a...

CVE-2025-11680 Out-of-bounds Write in libwebsockets PNG parsing

Out-of-bounds Write in unfilterscanline in warmcat libwebsockets allows, when the LWSWITHUPNG flag is enabled during compilation and the HTML display stack is used, to write past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a...

CVE-2025-11680

Out-of-bounds Write in unfilterscanline in warmcat libwebsockets allows, when the LWSWITHUPNG flag is enabled during compilation and the HTML display stack is used, to write past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a...

CVE-2025-11679 Out-of-bounds Read in libwebsockets PNG parsing

Out-of-bounds Read in lwsupngemitnextline in warmcat libwebsockets allows, when the LWSWITHUPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a...

CVE-2025-11679 Out-of-bounds Read in libwebsockets PNG parsing

Out-of-bounds Read in lwsupngemitnextline in warmcat libwebsockets allows, when the LWSWITHUPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a...

CVE-2025-11679

CVE-2025-11679 affects warmcat libwebsockets where an out-of-bounds read in lws_upng_emit_next_line can occur if LWS_WITH_UPNG is enabled and the HTML display stack is used, potentially crashing a heap-allocated buffer when a crafted PNG with large height is viewed. Public sources (Fedora, Debian...

CVE-2025-11679

Out-of-bounds Read in lwsupngemitnextline in warmcat libwebsockets allows, when the LWSWITHUPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a...

CVE-2025-11678 Stack-based Buffer Overflow in libwebsockets DNS response parsing

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...

CVE-2025-11678 Stack-based Buffer Overflow in libwebsockets DNS response parsing

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...

CVE-2025-11678

CVE-2025-11678 affects libwebsockets (lws_adns_parse_label). The vulnerability is a stack-based buffer overflow that can occur when LWS_WITH_SYS_ASYNC_DNS is enabled, allowing an attacker who can observe a DNS request to craft a response with a long label that overflows label_stack. Affected soft...