What happened
In the Linux kernel, the following vulnerability has been resolved: net: mana: Skip redundant detach on already-detached port When mana_per_port_queue_reset_work_handler() runs after a previous detach succeeded but attach failed, the port is left in a detached state with apc->tx_qp and apc->rxqs already freed. Calling mana_detach() again unconditionally leads to NULL pointer dereferences during queue teardown. Add an early exit in mana_detach() when the port is already in detached state (!netif_device_present) for non-close callers, making it safe to call idempotently. This allows the queue reset handler and other recovery paths to simply retry mana_attach() without redundant teardown.
Affected versions
Linux: fb9f98e1041a30dd5766620a2a64cb472b54caa9 through before c4152b4e28b3e550ec99351bf900e2c24c2608cc (git); 3b194343c25084a8d2fa0c0f2c9e80f3080fd732 through before 7ae590797f9b5c240aaea5773f5f00977a42a846 (git); 3b194343c25084a8d2fa0c0f2c9e80f3080fd732 through before 5b05aa36ee24297d7296ca58dfd8c448d0e4cda3 (git); 6.18.33 through before 6.18.35 (semver); 7.0 Fixed: See vendor advisory.
Why it matters
Review the vendor advisory and exposure of the affected product to determine operational impact.
Detection & mitigation
- Apply vendor-provided updates or mitigations.
- Review affected product exposure and access logs.
Public PoC references
No public PoC reference has passed the current publication threshold.