CVE-2026-63972
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 kernel versions
6.18.33,
7.0
and later are affected. Fixed in
6.18.35,
7.0.12,
7.1
and their respective stable series.
References
3 totalFrequently asked questions
-
What is CVE-2026-63972?
CVE-2026-63972 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.18.33 onward and has been patched in 6.18.35, 7.0.12 and 7.1. CVE-2026-63972 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
-
Is there a patch available for CVE-2026-63972?
Yes — CVE-2026-63972 has been patched. Fixed versions include 6.18.35, 7.0.12 and 7.1. If you are running Linux kernel 6.18.33 or later up to the fix versions, apply the relevant patch for your kernel branch.
-
Is CVE-2026-63972 actively exploited?
No — CVE-2026-63972 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.