SB20260626179 - Use-after-free in Linux kernel ipv4

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Main Vulnerability Database SB20260626179

SB20260626179 - Use-after-free in Linux kernel ipv4

Published: June 26, 2026

Security Bulletin ID SB20260626179
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-53175)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to a use-after-free in inet_frag_queue_flush() and fragment reassembly handling when processing fragmented network packets during network namespace teardown. A remote attacker can send fragmented packets and trigger reuse of a flushed fragment queue to cause a denial of service.

IPv6, nf_conntrack_reasm6, and 6lowpan reassembly share the same affected flush path.


Remediation

Install update from vendor's website.

References