CVE-2026-68320

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.

CVSS v3 7.3 HIGH

7.3^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.5

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/11092d79eb2b7c0068382f72fc2416d1786bb2e0
https://git.kernel.org/stable/c/3d22a7da2e264f407c729f33a0a346ff76108bc6
https://git.kernel.org/stable/c/54bb4c03fa17cdcb157c26c33e60a78cf32960f5
https://git.kernel.org/stable/c/5a365f1e423444c5da7eb689a8661633dad43e48
https://git.kernel.org/stable/c/6837c1c19a259518974cbc5a52017646e3906564
https://git.kernel.org/stable/c/886e28e14ab655012779016d251fef53d103aa12
https://git.kernel.org/stable/c/b6ea3dda09eb4d5caf7bbc00f857688cf9e98255
https://git.kernel.org/stable/c/ff04b26794a16a8a879eb4fd2c02c2d6b03850e9

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-10 13:20

Updated : 2026-08-19 17:20

NVD link : CVE-2026-68320

Mitre link : CVE-2026-68320

CVE.ORG link : CVE-2026-68320

JSON object : View

Products Affected

No product.

CWE

No CWE.

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However, the copy\ndestination asoc->c.auth_chunks in struct sctp_cookie is only\nSCTP_AUTH_MAX_CHUNKS (16) entries (20 bytes). When more than 16\nchunks are added, sctp_association_init() memcpy overflows the\ndestination by up to 4 bytes.\n\nFix by using SCTP_AUTH_MAX_CHUNKS as the capacity limit, matching\nthe destination capacity."}], "lastModified": "2026-08-19T17:20:42.260", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}