CVE-2026-68320High· 7.3▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: sctp: fix auth_chunk_list capacity check in sctp_auth_ep_add_chunkid sctp_auth_ep_add_chunkid() uses SCTP_NUM_CHUNK_TYPES (20) as the capacity limit for ep->auth_chunk…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 40.2 · likelihood 0 · 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.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
In the Linux kernel, the following vulnerability has been resolved:
sctp: fix auth_chunk_list capacity check in sctp_auth_ep_add_chunkid
sctp_auth_ep_add_chunkid() uses SCTP_NUM_CHUNK_TYPES (20) as the capacity limit for ep->auth_chunk_list, allowing it to hold up to 20 chunk entries (param_hdr.length up to 24). However, the copy destination asoc->c.auth_chunks in struct sctp_cookie is only SCTP_AUTH_MAX_CHUNKS (16) entries (20 bytes). When more than 16 chunks are added, sctp_association_init() memcpy overflows the destination by up to 4 bytes.
Fix by using SCTP_AUTH_MAX_CHUNKS as the capacity limit, matching the destination capacity.
Linux >= 1f485649f52929d9937b346a920a522a7363e202 < 3d22a7da2e264f407c729f33a0a346ff76108bc6Linux >= 1f485649f52929d9937b346a920a522a7363e202 < 6837c1c19a259518974cbc5a52017646e3906564Linux >= 1f485649f52929d9937b346a920a522a7363e202 < 54bb4c03fa17cdcb157c26c33e60a78cf32960f5Linux >= 1f485649f52929d9937b346a920a522a7363e202 < 5a365f1e423444c5da7eb689a8661633dad43e48Linux >= 1f485649f52929d9937b346a920a522a7363e202 < 886e28e14ab655012779016d251fef53d103aa12Linux >= 1f485649f52929d9937b346a920a522a7363e202 < 11092d79eb2b7c0068382f72fc2416d1786bb2e0Linux >= 1f485649f52929d9937b346a920a522a7363e202 < b6ea3dda09eb4d5caf7bbc00f857688cf9e98255Linux >= 1f485649f52929d9937b346a920a522a7363e202 < ff04b26794a16a8a879eb4fd2c02c2d6b03850e9Linux 2.6.24Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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