SB2026020282 - Red Hat Enterprise Linux 9 update for kernel

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Main Vulnerability Database SB2026020282

SB2026020282 - Red Hat Enterprise Linux 9 update for kernel

Published: February 2, 2026

Security Bulletin ID SB2026020282
CSH 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 vulnerabilities.


1) Input validation error (CVE-ID: CVE-2025-21863)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


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

The vulnerability exists due to improper input validation within the io_init_req() function in io_uring/io_uring.c. A local user can perform a denial of service (DoS) attack.


2) Use-after-free (CVE-ID: CVE-2025-40248)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


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

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


3) Out-of-bounds read (CVE-ID: CVE-2025-68301)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


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 aq_ring_rx_clean() function in drivers/net/ethernet/aquantia/atlantic/aq_ring.c. A local user can perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References