Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing When a listening SCTP server processes a COOKIE_ECHO chunk, the cached peer INIT chunk embedded after the cookie is parsed and its parameters are later walked by sctp_process_init() using sctp_walk_params(). However, the chunk header length of this cached INIT chunk was not validated against the remaining buffer in the COOKIE_ECHO payload. If the length field is inflated, the parameter walk can run beyond the actual received data, leading to out-of-bounds reads and potential memory corruption during later parameter handling (e.g. STATE_COOKIE processing and kmemdup() copies). Add a bounds check in sctp_unpack_cookie() to ensure the cached INIT chunk length does not exceed the available data in the COOKIE_ECHO buffer before it is used.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 2.6.12.1, < 6.18.36 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/0861615c28de668669d748ef4eb913ea9262d13bPatch
- https://git.kernel.org/stable/c/cc272185c9a9a4b7febc2de52eeaa3d00f19091ePatch
- https://git.kernel.org/stable/c/edccbf3d63b0a3362bc916ea72edacc1e1ca456aPatch
FAQ
What is CVE-2026-53246?
CVE-2026-53246 is a vulnerability with a CVSS score of 9.8 (CRITICAL). In the Linux kernel, the following vulnerability has been resolved: sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing When a listening SCTP server processes a COOKIE_ECHO chunk,...
How severe is CVE-2026-53246?
CVE-2026-53246 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-53246?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.