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CVE-2026-53246 is an SCTP input-validation vulnerability in the Linux kernel's COOKIE_ECHO processing. A listening SCTP endpoint accepts a cached peer INIT chunk embedded after the state cookie and subsequently passes its parameters to SCTP initialization processing. The cached INIT chunk's declared length was not validated against the remaining COOKIE_ECHO payload before parameter walking. An inflated chunk length can cause parsing beyond the received buffer, producing out-of-bounds reads and potentially causing memory corruption in subsequent parameter handling and copying operations.
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Linux kernel SCTP COOKIE_ECHO-processing vulnerability caused by inadequate validation of cached peer INIT chunk length.
A Linux kernel SCTP vulnerability involving validation of the cached peer INIT chunk length during COOKIE_ECHO processing.
Linux kernel SCTP flaw involving validation of cached peer INIT chunk length during COOKIE_ECHO processing.
Linux kernel SCTP flaw caused by insufficient validation of cached peer INIT chunk length during COOKIE_ECHO processing.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.