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CVE-2026-98544

UnknownEPSS 0.20%

Last modified

CVE-2026-98544 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: bna: prevent IOC timer rearm during teardown bna: prevent IOC timer rearm during teardown bnad_pci_remove() and the probe disable_ioceth path call timer_delete_sync() for ioc_timer, sem_timer and hb_timer, but not for iocpf_timer. bnad_iocpf_timeout() then takes bnad->bna_lock after free_netdev() has freed the struct bnad. Deleting iocpf_timer last does not fix this. EPSS estimates a 0.20% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: bna: prevent IOC timer rearm during teardown bna: prevent IOC timer rearm during teardown bnad_pci_remove() and the probe disable_ioceth path call timer_delete_sync() for ioc_timer, sem_timer and hb_timer, but not for iocpf_timer. bnad_iocpf_timeout() then takes bnad->bna_lock after free_netdev() has freed the struct bnad. Deleting iocpf_timer last does not fix this. sem_timer and iocpf_timer rearm each other: bnad_iocpf_sem_timeout() can arm iocpf_timer, and bnad_iocpf_timeout() arms sem_timer from bfa_ioc_hw_sem_get() when the semaphore is busy. timer_delete_sync() only waits out its own callback. bnad_ioceth_disable() can time out and leave that callback live. Shut all four IOC timers down with timer_shutdown_sync() on both paths, so a later mod_timer() is ignored. This issue was identified during our ongoing static-analysis research while reviewing kernel code.

Metrics

EPSS Probability
0.20%

9.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 1d32f7696286eef9e5644eb57e79a36756274357, < 8160cd1ec527caedd36c36f948234e834cd086e6; >= 1d32f7696286eef9e5644eb57e79a36756274357, < 3614582375fc4407e09ff42ff178a045e2fe6e8f; >= 1d32f7696286eef9e5644eb57e79a36756274357, < f04cbdfac9b8284146995ab7ba0d054ad1d20ec6; >= 1d32f7696286eef9e5644eb57e79a36756274357, < 28e32ace754b57534ef0ca0fb99bcbea5b13ba2a; >= 1d32f7696286eef9e5644eb57e79a36756274357, < 4d97a141e85a034566c33c7ed854c8a3e8a268f1; >= 1d32f7696286eef9e5644eb57e79a36756274357, < e09d1c6729ee4a7812128902d9274ff565f958b8; >= 1d32f7696286eef9e5644eb57e79a36756274357, < 77b1718e39e5c9f6956fb60807326af20baf889d
LinuxLinux2.6.38

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98544?
In the Linux kernel, the following vulnerability has been resolved: bna: prevent IOC timer rearm during teardown bna: prevent IOC timer rearm during teardown bnad_pci_remove() and the probe disable_ioceth path call timer_delete_sync() for ioc_timer, sem_timer and hb_timer, but not for iocpf_timer. bnad_iocpf_timeout() then takes bnad->bna_lock after free_netdev() has freed the struct bnad. Deleting iocpf_timer last does not fix this. sem_timer and iocpf_timer rearm each other: bnad_iocpf_sem_timeout() can arm iocpf_timer, and bnad_iocpf_timeout() arms sem_timer from bfa_ioc_hw_sem_get() when the semaphore is busy. timer_delete_sync() only waits out its own callback. bnad_ioceth_disable() can time out and leave that callback live. Shut all four IOC timers down with timer_shutdown_sync() on both paths, so a later mod_timer() is ignored. This issue was identified during our ongoing static-analysis research while reviewing kernel code.
How severe is CVE-2026-98544?
Severity scoring for CVE-2026-98544 is pending analysis. The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.
How do I fix CVE-2026-98544?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST