SB20261023239 - Incorrect calculation in Linux kernel core

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Main Vulnerability Database SB20261023239

SB20261023239 - Incorrect calculation in Linux kernel core

Published: October 23, 2026

Security Bulletin ID SB20261023239
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) Incorrect calculation (CVE-ID: CVE-2026-98925)

CWE-ID: CWE-682 - Incorrect Calculation

CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a local privileged user to trigger kernel warnings and potentially disrupt TCP receive processing.

The vulnerability exists due to incorrect sequence-number accounting in the Linux kernel BPF sockmap component when a BPF stream_verdict program redirects data back to the same socket with BPF_F_INGRESS. A local privileged user can trigger this self-redirect followed by a socket read to advance copied_seq twice for the same data, triggering kernel warnings and potentially disrupting TCP receive processing.


Remediation

Install update from vendor's website.

References