CVE-2025-11678 (GCVE-0-2025-11678)
Vulnerability from cvelistv5 – Published: 2025-10-20 13:51 – Updated: 2025-10-20 14:00
VLAI
EPSS
VEX
Title
Stack-based Buffer Overflow in libwebsockets DNS response parsing
Summary
Stack-based Buffer Overflow in lws_adns_parse_label in warmcat libwebsockets allows, when the LWS_WITH_SYS_ASYNC_DNS flag is enabled during compilation, to overflow the label_stack, 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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-20 14:00 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
Nozomi
CNA
References
2 references
| URL | Tags |
|---|---|
| https://libwebsockets.org/git/libwebsockets/commi… | patchvendor-advisory |
| https://www.nozominetworks.com/labs/vulnerability… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| warmcat | libwebsocket |
Affected:
4.0 , ≤ 4.4.2
(semver)
Affected: 4.0 , ≤ 4.3.6 (semver) |
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