SB2026100762 - Improper Check for Unusual or Exceptional Conditions in Linux kernel ipv4

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2026100762

SB2026100762 - Improper Check for Unusual or Exceptional Conditions in Linux kernel ipv4

Published: October 7, 2026

Security Bulletin ID SB2026100762
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) Improper Check for Unusual or Exceptional Conditions (CVE-ID: CVE-2026-98303)

CWE-ID: CWE-754 - Improper Check for Unusual or Exceptional Conditions

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to trigger a kernel warning.

The vulnerability exists due to improper checking of unreachable input routes in icmp_route_lookup() when performing reverse-path route lookup for ICMP output. A local user can supply a packet whose source address resolves to an unreachable input route to trigger a kernel warning.

The reverse-path lookup is reached when the forward output route cannot be used. An unreachable input route can be returned when forwarding is disabled.


Remediation

Install update from vendor's website.

References