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Advisory severityUnratedRed Hat Linux

Advisory [CVE-2026-53112] fix possible use-after-free caused by unfinished irq_prepare_bcn_tasklet

This Red Hat Linux security advisory covers CVE-2026-53112.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-53112 Source published Source updated

VulniPulse record published Record updated

CVE-2026-53112
Affected products & platforms
Red Hat LinuxUnclassified
Open source advisory

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: rtlwifi: pci: fix possible use-after-free caused by unfinished irq_prepare_bcn_tasklet The irq_prepare_bcn_tasklet is initialized in rtl_pci_init() and scheduled when RTL_IMR_BCNINT interrupt is triggered by hardware. But it is never killed in rtl_pci_deinit().

When the rtlwifi card probe fails or is being detached, the ieee80211_hw is deallocated. However, irq_prepare_bcn_tasklet may still be running or pending, leading to use-after-free when the freed ieee80211_hw is accessed in _rtl_pci_prepare_bcn_tasklet().

Similar to irq_tasklet, add tasklet_kill() in rtl_pci_deinit() to ensure that irq_prepare_bcn_tasklet is properly terminated before the ieee80211_hw is released. The issue was identified through static analysis.

This vulnerability, a use-after-free, occurs when a `rtlwifi` wireless card is detached or fails to initialize, and a related background task is not properly shut down. This can lead to the system attempting to access memory that has already been released, potentially causing system instability or a denial of service.

Red Hat severity: not rated. Weakness: CWE-825.

Red Hat lists Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9 as not affected.

Is CVE-2026-53112 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-53112 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-53112?

The advisory VulniPulse tracks names no fixed release. Follow Red Hat's guidance for workarounds and updates.

Confirm against the vendor advisory before you patch.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · medium-confidence parse· fetched 14 days ago·verify at source

Fixed versions

No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.

Official advisory · medium-confidence parse· fetched 14 days ago·verify at source

Mitigation

The source record does not include mitigation steps. That does not mean no fix exists. Read the vendor advisory below for the authoritative guidance.

Official advisory · medium-confidence parse· fetched 14 days ago·verify at source

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