SB20260727104 - Missing Release of Resource after Effective Lifetime in Linux kernel android binder driver

Description

This security bulletin contains information about 1 vulnerability.

1) Missing Release of Resource after Effective Lifetime (CVE-ID: CVE-2026-64466)

CWE-ID: CWE-772 - Missing Release of Resource after Effective Lifetime

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper resource management in the rust binder freeze listener handling when dropping the last reference to a node without clearing its freeze listener. A local user can drop the node reference while leaving a stale freeze listener registered to cause a denial of service.

The issue can leave the listener in both the freeze_listeners rbtree and the remote node's freeze listener list, potentially creating a refcount cycle that results in a memory leak.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0644da3621ddd8e146280675a2a31d1e06634a1d
• https://git.kernel.org/stable/c/91b27f8172cdbf265240104772fd042a461a7767
• https://git.kernel.org/stable/c/bc4a9828897871ff3e5a1f8a1d346decbf4ee95e