SB2025121733 - Red Hat Enterprise Linux 9 update for kernel

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Main Vulnerability Database SB2025121733

SB2025121733 - Red Hat Enterprise Linux 9 update for kernel

Published: December 17, 2025

Security Bulletin ID SB2025121733
Severity
Low
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Use-after-free (CVE-ID: CVE-2025-39864)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the cfg80211_update_known_bss() function in net/wireless/scan.c. A local user can escalate privileges on the system.


2) Resource management error (CVE-ID: CVE-2025-39955)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to resource management error within the tcp_disconnect() function in net/ipv4/tcp.c. A local user can perform a denial of service (DoS) attack.


3) Use-after-free (CVE-ID: CVE-2025-40186)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the tcp_conn_request() function in net/ipv4/tcp_input.c. A local user can escalate privileges on the system.


Remediation

Install update from vendor's website.

References