CVE-2026-68320

Kernel memory corruption via oversized SCTP chunk list

Published Aug 10, 2026 · Updated Aug 10, 2026

Out-of-bounds write in the Linux kernel SCTP authentication path allows local users to corrupt kernel memory through crafted chunk lists. sctp_auth_ep_add_chunkid permits 20 entries, but sctp_association_init copies them into the 16-entry auth_chunks field in struct sctp_cookie. Reachability requires local low-privileged access, and published sources establish no code execution, privilege escalation, or reliable service interruption.

CVSS severity7.0
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in the Linux kernel SCTP authentication path allows local users to corrupt kernel memory through crafted chunk lists. sctp_auth_ep_add_chunkid permits 20 entries, but sctp_association_init copies them into the 16-entry auth_chunks field in struct sctp_cookie. Reachability requires local low-privileged access, and published sources establish no code execution, privilege escalation, or reliable service interruption.

The record

CVE
CVE-2026-68320
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1f485649f52929d9937b346a920a522a7363e202 <11092d79eb2b7c0068382f72fc2416d1786bb2e0
  2. Affected versionversion=1f485649f52929d9937b346a920a522a7363e202 <5a365f1e423444c5da7eb689a8661633dad43e48
  3. Affected versionversion=1f485649f52929d9937b346a920a522a7363e202 <886e28e14ab655012779016d251fef53d103aa12
  4. Affected versionversion=1f485649f52929d9937b346a920a522a7363e202 <b6ea3dda09eb4d5caf7bbc00f857688cf9e98255
  5. Affected versionversion=1f485649f52929d9937b346a920a522a7363e202 <ff04b26794a16a8a879eb4fd2c02c2d6b03850e9
  6. Affected versionversion=2.6.24

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1f485649f52929d9937b346a920a522a7363e202 <11092d79eb2b7c0068382f72fc2416d1786bb2e0; version=1f485649f52929d9937b346a920a522a7363e202 <5a365f1e423444c5da7eb689a8661633dad43e48; version=1f485649f52929d9937b346a920a522a7363e202 <886e28e14ab655012779016d251fef53d103aa12; version=1f485649f52929d9937b346a920a522a7363e202 <b6ea3dda09eb4d5caf7bbc00f857688cf9e98255; version=1f485649f52929d9937b346a920a522a7363e202 <ff04b26794a16a8a879eb4fd2c02c2d6b03850e9; version=2.6.24

Published CVSS scores

7.0OracleCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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