In the Linux kernel, the following vulnerability has been resolved: llc: fix SAP refcount leak in llc_ui_autobind() llc_ui_autobind() opens a SAP… (CVE-2026-72022)
A vulnerability in the Linux kernel's llc module caused a SAP reference count leak in the llc_ui_autobind() function. This leak occurs because the function retains a reference that should be dropped after a successful autobind, leading to resource exhaustion of dynamic SAP values. Repeated autobind and close cycles can cause later autobinds to fail with an -EUSERS error. The issue has been resolved by adjusting the reference handling to match the ownership model of a similar function, llc_ui_bind().
AI Analysis
Technical Summary
The Linux kernel's llc_ui_autobind() function improperly manages SAP references by keeping a caller-owned reference after adding a socket, unlike llc_ui_bind() which correctly drops it. This causes SAP entries with zero socket references to remain on the llc_sap_list, leaking SAP references. Over time, this leak exhausts all dynamic SAP values, causing autobind failures with -EUSERS. The fix involves dropping the caller's reference after a successful autobind to prevent the leak.
Potential Impact
The vulnerability leads to a resource leak in the Linux kernel's llc module, which can cause denial of service for applications relying on dynamic SAP allocation. Specifically, repeated autobind and close operations can consume all available dynamic SAP values, preventing new autobind attempts from succeeding. There is no indication of privilege escalation or code execution impact.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to correct the reference counting in llc_ui_autobind(). Users should apply the official kernel update that includes this fix once available. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor advisory or kernel release notes for the exact patch version and remediation guidance.
In the Linux kernel, the following vulnerability has been resolved: llc: fix SAP refcount leak in llc_ui_autobind() llc_ui_autobind() opens a SAP… (CVE-2026-72022)
Description
A vulnerability in the Linux kernel's llc module caused a SAP reference count leak in the llc_ui_autobind() function. This leak occurs because the function retains a reference that should be dropped after a successful autobind, leading to resource exhaustion of dynamic SAP values. Repeated autobind and close cycles can cause later autobinds to fail with an -EUSERS error. The issue has been resolved by adjusting the reference handling to match the ownership model of a similar function, llc_ui_bind().
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel's llc_ui_autobind() function improperly manages SAP references by keeping a caller-owned reference after adding a socket, unlike llc_ui_bind() which correctly drops it. This causes SAP entries with zero socket references to remain on the llc_sap_list, leaking SAP references. Over time, this leak exhausts all dynamic SAP values, causing autobind failures with -EUSERS. The fix involves dropping the caller's reference after a successful autobind to prevent the leak.
Potential Impact
The vulnerability leads to a resource leak in the Linux kernel's llc module, which can cause denial of service for applications relying on dynamic SAP allocation. Specifically, repeated autobind and close operations can consume all available dynamic SAP values, preventing new autobind attempts from succeeding. There is no indication of privilege escalation or code execution impact.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to correct the reference counting in llc_ui_autobind(). Users should apply the official kernel update that includes this fix once available. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor advisory or kernel release notes for the exact patch version and remediation guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-8wqh-fvw2-pqc7
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-72022"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a808b79bf8831d539502493
Added to database: 08/15/2026, 15:53:29 UTC
Last enriched: 08/15/2026, 17:09:47 UTC
Last updated: 08/16/2026, 00:41:15 UTC
Views: 5
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