SB2026100665 - Memory leak in Linux kernel ipv6

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Main Vulnerability Database SB2026100665

SB2026100665 - Memory leak in Linux kernel ipv6

Published: October 6, 2026

Security Bulletin ID SB2026100665
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Memory leak (CVE-ID: CVE-2026-98368)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

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


The vulnerability allows a local user to leak kernel page memory.

The vulnerability exists due to missing release of a destination-page reference in esp_output_tail() and skb_release_data() when processing out-of-place ESP output containing zerocopy managed fragments. A local user can trigger this processing to leak kernel page memory.

The destination page retains a reference while SKBFL_MANAGED_FRAG_REFS remains set, causing skb_release_data() to take its skip_unref branch. The leak occurs at packet rate.


Remediation

Install update from vendor's website.

References