SB2026012805 - Red Hat Enterprise Linux 9 update for kernel

Description

This security bulletin contains information about 4 vulnerabilities.

1) Out-of-bounds read (CVE-ID: CVE-2023-53034)

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 switchtec_ntb_mw_set_trans() function in drivers/ntb/hw/mscc/ntb_hw_switchtec.c. A local user can perform a denial of service (DoS) attack.

2) Input validation error (CVE-ID: CVE-2025-37789)

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 validate_set() function in net/openvswitch/flow_netlink.c. A local user can perform a denial of service (DoS) attack.

3) Double free (CVE-ID: CVE-2025-37819)

CWE-ID: CWE-415 - Double Free

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 a double free error within the gicv2m_of_init() function in drivers/irqchip/irq-gic-v2m.c. A local user can perform a denial of service (DoS) attack.

4) Use-after-free (CVE-ID: CVE-2025-40258)

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 mptcp_reset_rtx_timer() function in net/mptcp/protocol.c. A local user can escalate privileges on the system.

Remediation

Install update from vendor's website.

References

• https://access.redhat.com/errata/RHSA-2026:1444