SB20260422173 - Red Hat Enterprise Linux 9 update for kernel-rt

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Main Vulnerability Database SB20260422173

SB20260422173 - Red Hat Enterprise Linux 9 update for kernel-rt

Published: April 22, 2026

Security Bulletin ID SB20260422173
Severity
Low
Patch available
YES
Number of vulnerabilities 9
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 9 secuirty vulnerabilities.


1) Use-after-free (CVE-ID: CVE-2025-38248)

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

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


2) Use-after-free (CVE-ID: CVE-2025-39981)

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

The vulnerability exists due to a use-after-free error within the net/bluetooth/mgmt_util.h. A local user can escalate privileges on the system.


3) Use-after-free (CVE-ID: CVE-2025-68800)

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

The vulnerability exists due to a use-after-free error within the mlxsw_sp_mr_route_add() function in drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.c. A local user can escalate privileges on the system.


4) Use-after-free (CVE-ID: CVE-2026-23066)

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

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


5) Memory leak (CVE-ID: CVE-2026-23144)

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

The vulnerability exists due to memory leak within the damon_sysfs_context_add_dirs() function in mm/damon/sysfs.c. A local user can perform a denial of service (DoS) attack.


6) Use-after-free (CVE-ID: CVE-2026-23171)

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

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


7) Use-after-free (CVE-ID: CVE-2026-23209)

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

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


8) Out-of-bounds read (CVE-ID: CVE-2026-23204)

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 u32_classify() function in net/sched/cls_u32.c. A local user can perform a denial of service (DoS) attack.


9) Use-after-free (CVE-ID: CVE-2026-23231)

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

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


Remediation

Install update from vendor's website.

References