SB20250226291 - Use-after-free in Linux kernel block drbd driver

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Main Vulnerability Database SB20250226291

SB20250226291 - Use-after-free in Linux kernel block drbd driver

Published: February 26, 2025 Updated: May 11, 2025

Security Bulletin ID SB20250226291
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2022-49085)

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 drbd_bitmap_io_from_worker(), notify_resource_state_change(), notify_connection_state_change(), notify_device_state_change(), notify_peer_device_state_change() and broadcast_state_change() functions in drivers/block/drbd/drbd_state.c, within the nla_put_notification_header(), notify_resource_state(), notify_device_state(), notify_connection_state(), notify_peer_device_state(), notify_initial_state_done() and get_initial_state() functions in drivers/block/drbd/drbd_nl.c. A local user can escalate privileges on the system.


Remediation

Install update from vendor's website.

References