CVE-2026-74752Critical· 9.8▾ MidnightIn the Linux kernel, the following vulnerability has been resolved: sctp: validate cookie AUTH state before use When cookie authentication is disabled, COOKIE_ECHO restores fixed-size AUTH fields directly from peer-controlled cookie by…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 53.9 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.4%
9.8 → 8.8
critical → high
Last analysed / modified upstream
8.8 → 9.8
high → critical
0.4% → 0.5%
In the Linux kernel, the following vulnerability has been resolved:
sctp: validate cookie AUTH state before use
When cookie authentication is disabled, COOKIE_ECHO restores fixed-size AUTH fields directly from peer-controlled cookie bytes. A forged RANDOM length, HMAC list, or CHUNKS list can then reach association consumers with lengths or identifiers that were never validated against the local backing arrays.
A forged RANDOM length can cause out-of-bounds reads during key-vector construction. A forged HMAC identifier also caused a 32-byte write past a zero-length AUTH chunk, providing a primitive for a local privilege escalation chain.
Validate the cookie's RANDOM, HMACS, and CHUNKS parameters at the cookie trust boundary before copying them into the association. Reject invalid types, malformed lengths, unsupported HMAC identifiers, HMAC lists without SHA1, and forbidden chunk ids.
Linux >= 1f485649f52929d9937b346a920a522a7363e202 < 4a4410de8dc6903d859c9e1731fc6dcee28bd072Linux >= 1f485649f52929d9937b346a920a522a7363e202 < 7f17984cfa697613800eb693e183b06884129bd3Linux >= 1f485649f52929d9937b346a920a522a7363e202 < 88619b117be1daf633ce32210570ce35a0bd1c98Linux >= 1f485649f52929d9937b346a920a522a7363e202 < 3dbb44d88b1e94dd31fe43588af7437b34b44d56Linux 2.6.24Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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