SB20260812151 - Out-of-bounds read in Linux kernel net sctp

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Main Vulnerability Database SB20260812151

SB20260812151 - Out-of-bounds read in Linux kernel net sctp

Published: August 12, 2026

Security Bulletin ID SB20260812151
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-68376)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in sctp_auth_get_hmac() when processing SCTP authentication parameters during association initialization. A local user can configure four HMAC identifiers to trigger memory corruption that leads to an out-of-bounds read and disclose sensitive information.

The issue stems from an undersized auth_hmacs array in struct sctp_cookie that can corrupt the adjacent auth_chunks field and cause an invalid HMAC identifier to be accepted.


Remediation

Install update from vendor's website.

References