High [CVE-2026-78161] Out-of-bounds write in LECP CBOR Recording
This high-severity Red Hat Linux advisory covers CVE-2026-78161.
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Summary
A vulnerability was found in warmcat libwebsockets 4.5.0. Impacted is the function report_raw_cbor of the file lib/misc/lecp.c of the component LECP CBOR Recording.
The manipulation results in out-of-bounds write. The attack can be launched remotely.
The exploit has been made public and could be used. The patch is identified as 1d44554a1bb262db63ff4e240152a9deecd99054.
It is best practice to apply a patch to resolve this issue. This could lead to information disclosure, data corruption, or denial of service.
The vulnerable code is not present in the versions of libwebsockets shipped with Red Hat offerings. Red Hat severity: Important — CVSS 7.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).
Weakness: CWE-787. Red Hat lists A-MQ Interconnect 1; Red Hat OpenStack Platform 16.2; Red Hat OpenStack Platform 17.1; Red Hat Satellite 6; Red Hat Service Interconnect 2 as not affected.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 8 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 8 days ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 8 days ago·verify at source
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