SB20260919113 - Use of insufficiently random values in Linux kernel ipv4

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Main Vulnerability Database SB20260919113

SB20260919113 - Use of insufficiently random values in Linux kernel ipv4

Published: September 19, 2026

Security Bulletin ID SB20260919113
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use of insufficiently random values (CVE-ID: CVE-2026-90110)

CWE-ID: CWE-330 - Use of Insufficiently Random Values

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to bypass IP-keyed ICMP rate limits and infer open UDP ports.

The vulnerability exists due to predictable tree ordering in the inetpeer rate limiting system when processing packets from remote IP addresses. A remote attacker can trigger garbage collection and selectively evict inet_peer entries to bypass IP-keyed ICMP rate limits and infer open UDP ports.

Re-created entries have their rate-limiting token buckets reset to full capacity.


Remediation

Install update from vendor's website.

References