CVE-2025-39911
Estado: AnalizadaAlta (7.8)—
In the Linux kernel, the following vulnerability has been resolved:
i40e: fix IRQ freeing in i40e_vsi_request_irq_msix error path
If request_irq() in i40e_vsi_request_irq_msix() fails in an iteration later than the first, the error path wants to free the IRQs requested so far. However, it uses the wrong dev_id argument for free_irq(), so it does not free the IRQs correctly and instead triggers the warning:
Use the same dev_id for free_irq() as for request_irq().
I tested this with inserting code to fail intentionally.
Detalles técnicos trazas, registros y código del informe original
Trying to free already-free IRQ 173 WARNING: CPU: 25 PID: 1091 at kernel/irq/manage.c:1829 __free_irq+0x192/0x2c0 Modules linked in: i40e(+) [...] CPU: 25 UID: 0 PID: 1091 Comm: NetworkManager Not tainted 6.17.0-rc1+ #1 PREEMPT(lazy) Hardware name: [...] RIP: 0010:__free_irq+0x192/0x2c0 [...] Call Trace: <TASK> free_irq+0x32/0x70 i40e_vsi_request_irq_msix.cold+0x63/0x8b [i40e] i40e_vsi_request_irq+0x79/0x80 [i40e] i40e_vsi_open+0x21f/0x2f0 [i40e] i40e_open+0x63/0x130 [i40e] __dev_open+0xfc/0x210 __dev_change_flags+0x1fc/0x240 netif_change_flags+0x27/0x70 do_setlink.isra.0+0x341/0xc70 rtnl_newlink+0x468/0x860 rtnetlink_rcv_msg+0x375/0x450 netlink_rcv_skb+0x5c/0x110 netlink_unicast+0x288/0x3c0 netlink_sendmsg+0x20d/0x430 ____sys_sendmsg+0x3a2/0x3d0 ___sys_sendmsg+0x99/0xe0 __sys_sendmsg+0x8a/0xf0 do_syscall_64+0x82/0x2c0 entry_SYSCALL_64_after_hwframe+0x76/0x7e [...] </TASK> ---[ end trace 0000000000000000 ]---
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.16%
- Percentil entre todas las CVEs puntuadas: 4
- 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).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation75 %
Acceso local (AV:L) sin interacción (UI:N) con privilegios (PR:L) permite manipular la liberación de IRQs causando DoS de recursos. El fallo de gestión de errores en i40e_vsi_request_irq_msix afecta la estabilidad del kernel.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (2)
CWE
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/13ab9adef3cd386511c930a9660ae06595007f89
- https://git.kernel.org/stable/c/23431998a37764c464737b855c71a81d50992e98
- https://git.kernel.org/stable/c/6e4016c0dca53afc71e3b99e24252b63417395df
- https://git.kernel.org/stable/c/915470e1b44e71d1dd07ee067276f003c3521ee3
- https://git.kernel.org/stable/c/a30afd6617c30aaa338d1dbcb1e34e7a1890085c
- https://git.kernel.org/stable/c/b905b2acb3a0bbb08ad9be9984d8cdabdf827315
- https://git.kernel.org/stable/c/b9721a023df38cf44a88f2739b4cf51efd051f85
- https://git.kernel.org/stable/c/c62580674ce5feb1be4f90b5873ff3ce50e0a1db
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni40e: fix IRQ freeing in i40e_vsi_request_irq_msix error path\n\nIf request_irq() in i40e_vsi_request_irq_msix() fails in an iteration\nlater than the first, the error path wants to free the IRQs requested\nso far. However, it uses the wrong dev_id argument for free_irq(), so\nit does not free the IRQs correctly and instead triggers the warning:\n\n Trying to free already-free IRQ 173\n WARNING: CPU: 25 PID: 1091 at kernel/irq/manage.c:1829 __free_irq+0x192/0x2c0\n Modules linked in: i40e(+) [...]\n CPU: 25 UID: 0 PID: 1091 Comm: NetworkManager Not tainted 6.17.0-rc1+ #1 PREEMPT(lazy)\n Hardware name: [...]\n RIP: 0010:__free_irq+0x192/0x2c0\n [...]\n Call Trace:\n <TASK>\n free_irq+0x32/0x70\n i40e_vsi_request_irq_msix.cold+0x63/0x8b [i40e]\n i40e_vsi_request_irq+0x79/0x80 [i40e]\n i40e_vsi_open+0x21f/0x2f0 [i40e]\n i40e_open+0x63/0x130 [i40e]\n __dev_open+0xfc/0x210\n __dev_change_flags+0x1fc/0x240\n netif_change_flags+0x27/0x70\n do_setlink.isra.0+0x341/0xc70\n rtnl_newlink+0x468/0x860\n rtnetlink_rcv_msg+0x375/0x450\n netlink_rcv_skb+0x5c/0x110\n netlink_unicast+0x288/0x3c0\n netlink_sendmsg+0x20d/0x430\n ____sys_sendmsg+0x3a2/0x3d0\n ___sys_sendmsg+0x99/0xe0\n __sys_sendmsg+0x8a/0xf0\n do_syscall_64+0x82/0x2c0\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n [...]\n </TASK>\n ---[ end trace 0000000000000000 ]---\n\nUse the same dev_id for free_irq() as for request_irq().\n\nI tested this with inserting code to fail intentionally."
}
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