Local memory consumption via stale freeze listeners
Published Jul 25, 2026 · Updated Jul 25, 2026
Improper reference-count cleanup in Linux Kernel 6.18 allows local users to consume memory through Rust Binder freeze listeners. When userspace drops a node reference to zero without first clearing its listener, cleanup leaves that listener in both the process red-black tree and remote node list, retaining a reference cycle. Triggering the leak requires local access to the Rust Binder interface; repeated leaked cycles can reduce available memory, but no crash is established.
Summary
What happened
Improper reference-count cleanup in Linux Kernel 6.18 allows local users to consume memory through Rust Binder freeze listeners. When userspace drops a node reference to zero without first clearing its listener, cleanup leaves that listener in both the process red-black tree and remote node list, retaining a reference cycle. Triggering the leak requires local access to the Rust Binder interface; repeated leaked cycles can reduce available memory, but no crash is established.
The record
- CVE
- CVE-2026-64466
- Published
- Jul 25, 2026
- Updated
- Jul 25, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-911
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 25, 2026CVE publishedPublication date reported by the CVE source.
- Jul 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=6.18
- Affected versionversion=eafedbc7c050c44744fbdf80bdf3315e860b7513 <0644da3621ddd8e146280675a2a31d1e06634a1d
- Affected versionversion=eafedbc7c050c44744fbdf80bdf3315e860b7513 <91b27f8172cdbf265240104772fd042a461a7767
- Affected versionversion=eafedbc7c050c44744fbdf80bdf3315e860b7513 <bc4a9828897871ff3e5a1f8a1d346decbf4ee95e
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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