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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-72389 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: bridge: stp: Fix a potential use-after-free when deleting a bridge The three STP timers are not supposed to be armed while the bridge is administratively down. They are synchronously deactivated when the bridge is put administratively down and the various call sites check for 'IFF_UP' before arming them. This check is missing from br_topology_change_detection() and it is possible to engineer a situation in which the topology change timer is armed while the bridge is administratively down, resulting in a use-after-free [1] when the bridge is deleted. Fix by adding the missing check and for good measures synchronously shutdown the three timers when the bridge is deleted. [1] ODEBUG: free active (active state 0) object: ffff88811662b9b0 object type: timer_list hint: br_topology_change_timer_expired (net/bridge/br_stp_timer.c:120) WARNING: lib/debugobjects.c:629 at debug_print_object+0x1bc/0x450, CPU#9: ip/359


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/297a747f59bff6573196d7236178144d66524e68 kernel.org
https://git.kernel.org/stable/c/2a00517db8de4be7df3d483b215c5544fb30a191 kernel.org
https://git.kernel.org/stable/c/39283907a25e5caf0f2bd2947f6e56644b01e2b7 kernel.org
https://git.kernel.org/stable/c/40cbfa3a28e0919469d1b086629bb3ce38a83593 kernel.org
https://git.kernel.org/stable/c/4c40eec06eeac37c58e47a6058eb32901218d5d4 kernel.org
https://git.kernel.org/stable/c/b4b3458ef88df4798632619f018791d4344bcd92 kernel.org
https://git.kernel.org/stable/c/c86579b0a2d201792bcb59316629f4ba4758cfc8 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-72389
NVD Published Date:
08/15/2026
NVD Last Modified:
08/15/2026
Source:
kernel.org