bna: prevent IOC timer rearm during teardown

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Summary

CVECVE-2026-98544
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-18 16:17:06 UTC
Updated2026-10-18 16:17:06 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1d32f7696286eef9e5644eb57e79a36756274357 28e32ace754b57534ef0ca0fb99bcbea5b13ba2a git Not specified
CNA Linux Linux affected 1d32f7696286eef9e5644eb57e79a36756274357 4d97a141e85a034566c33c7ed854c8a3e8a268f1 git Not specified
CNA Linux Linux affected 1d32f7696286eef9e5644eb57e79a36756274357 e09d1c6729ee4a7812128902d9274ff565f958b8 git Not specified
CNA Linux Linux affected 1d32f7696286eef9e5644eb57e79a36756274357 77b1718e39e5c9f6956fb60807326af20baf889d git Not specified
CNA Linux Linux affected 2.6.38 Not specified
CNA Linux Linux unaffected 2.6.38 semver Not specified
CNA Linux Linux unaffected 6.12.112 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.55 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.9 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/77b1718e39e5c9f6956fb60807326af20baf889d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e09d1c6729ee4a7812128902d9274ff565f958b8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/28e32ace754b57534ef0ca0fb99bcbea5b13ba2a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4d97a141e85a034566c33c7ed854c8a3e8a268f1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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