CVE-2026-63972
Last modified
CVE-2026-63972 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.58% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= fb9f98e1041a30dd5766620a2a64cb472b54caa9, < c4152b4e28b3e550ec99351bf900e2c24c2608cc; >= 3b194343c25084a8d2fa0c0f2c9e80f3080fd732, < 7ae590797f9b5c240aaea5773f5f00977a42a846; >= 3b194343c25084a8d2fa0c0f2c9e80f3080fd732, < 5b05aa36ee24297d7296ca58dfd8c448d0e4cda3; >= 6.18.33, < 6.18.35 |
| Linux | Linux | 7.0 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
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