SB2025032759 - Resource management error in Linux kernel net

Description

This security bulletin contains information about 1 vulnerability.

1) Resource management error (CVE-ID: CVE-2025-21884)

CWE-ID: CWE-399 - Resource Management Errors

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 resource management error within the xs_create_sock() function in net/sunrpc/xprtsock.c, within the svc_create_socket() function in net/sunrpc/svcsock.c, within the smc_create_clcsk() function in net/smc/af_smc.c, within the rds_tcp_tune() function in net/rds/tcp.c, within the netlink_release() function in net/netlink/af_netlink.c, within the mptcp_subflow_create_socket() function in net/mptcp/subflow.c, within the sk_alloc(), EXPORT_SYMBOL(), __sk_destruct() and sk_clone_lock() functions in net/core/sock.c. A local user can perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/5c70eb5c593d64d93b178905da215a9fd288a4b5
• https://git.kernel.org/stable/c/c31a732fac46b00b95b78fcc9c37cb48dd6f2e0c
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.6