SB2026021757 - Red Hat Enterprise Linux 8 update for kernel-rt

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Main Vulnerability Database SB2026021757

SB2026021757 - Red Hat Enterprise Linux 8 update for kernel-rt

Published: February 17, 2026

Security Bulletin ID SB2026021757
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-2025-40168)

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

The vulnerability exists due to a use-after-free error within the smc_clc_prfx_match6_rcu() function in net/smc/smc_clc.c. A local user can escalate privileges on the system.


2) Use-after-free (CVE-ID: CVE-2023-53762)

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

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


3) Out-of-bounds read (CVE-ID: CVE-2025-40304)

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

The vulnerability exists due to an out-of-bounds read error within the bit_putcs() function in drivers/video/fbdev/core/bitblit.c. A local user can perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References