CVE-2026-63973
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
net: mana: Add NULL guards in teardown path to prevent panic on attach failure
When queue allocation fails partway through, the error cleanup frees and NULLs apc->tx_qp and apc->rxqs. Multiple teardown paths such as mana_remove(), mana_change_mtu() recovery, and internal error handling in mana_alloc_queues() can subsequently call into functions that dereference these pointers without NULL checks:
- mana_chn_setxdp() dereferences apc->rxqs[0], causing a NULL pointer dereference panic (CR2: 0000000000000000 at mana_chn_setxdp+0x26). - mana_destroy_vport() iterates apc->rxqs without a NULL check. - mana_fence_rqs() iterates apc->rxqs without a NULL check. - mana_dealloc_queues() iterates apc->tx_qp without a NULL check.
Leer descripción completaMostrar menos
Add NULL guards for apc->rxqs in mana_fence_rqs(), mana_destroy_vport(), and before the mana_chn_setxdp() call. Add a NULL guard for apc->tx_qp in mana_dealloc_queues() to skip TX queue draining when TX queues were never allocated or already freed.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.16%
- Percentil entre todas las CVEs puntuadas: 5
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-476
Referencias
- https://git.kernel.org/stable/c/0a9c520fdcb1cb2e79c163c12d359b5e1ee40007
- https://git.kernel.org/stable/c/17bfe0a8c014ee1d542ad352cd6a0a505361664a
- https://git.kernel.org/stable/c/26a96fa81496afe7d162d172ccdc8cb9dbc685d2
- https://git.kernel.org/stable/c/95e414f8324385771bdfd6d497a01d5593813ccb
- https://git.kernel.org/stable/c/da7e4a1aaf397af6a094f640c92d6bc7564c10db
- https://git.kernel.org/stable/c/da87896f34e0a51489811d1a684e2953099ca98f
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Add NULL guards in teardown path to prevent panic on attach failure\n\nWhen queue allocation fails partway through, the error cleanup frees\nand NULLs apc->tx_qp and apc->rxqs. Multiple teardown paths such as\nmana_remove(), mana_change_mtu() recovery, and internal error handling\nin mana_alloc_queues() can subsequently call into functions that\ndereference these pointers without NULL checks:\n\n- mana_chn_setxdp() dereferences apc->rxqs[0], causing a NULL pointer\n dereference panic (CR2: 0000000000000000 at mana_chn_setxdp+0x26).\n- mana_destroy_vport() iterates apc->rxqs without a NULL check.\n- mana_fence_rqs() iterates apc->rxqs without a NULL check.\n- mana_dealloc_queues() iterates apc->tx_qp without a NULL check.\n\nAdd NULL guards for apc->rxqs in mana_fence_rqs(),\nmana_destroy_vport(), and before the mana_chn_setxdp() call. Add a\nNULL guard for apc->tx_qp in mana_dealloc_queues() to skip TX queue\ndraining when TX queues were never allocated or already freed."
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