SB2024061356 - Improper locking in Linux kernel smc

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Main Vulnerability Database SB2024061356

SB2024061356 - Improper locking in Linux kernel smc

Published: June 13, 2024 Updated: May 13, 2025

Security Bulletin ID SB2024061356
Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Improper locking (CVE-ID: CVE-2021-46925)

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

The vulnerability exists due to improper locking within the smc_wr_is_tx_pend(), smc_wr_tx_process_cqe(), smc_wr_reg_send() and smc_wr_free_link() functions in net/smc/smc_wr.c, within the smc_ib_modify_qp_rts() function in net/smc/smc_ib.c, within the smc_conn_free(), smcr_link_clear(), smc_conn_kill(), smc_smcd_terminate_all(), smc_smcr_terminate_all(), smcr_link_down() and init_waitqueue_head() functions in net/smc/smc_core.c, within the smc_cdc_tx_handler(), smc_cdc_msg_send(), smcr_cdc_msg_send_validation() and smc_cdc_get_slot_and_msg_send() functions in net/smc/smc_cdc.c. A local user can perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References