CVE-2026-23313
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
i40e: Fix preempt count leak in napi poll tracepoint
Using get_cpu() in the tracepoint assignment causes an obvious preempt count leak because nothing invokes put_cpu() to undo it:
This clearly has seen a lot of testing in the last 3+ years...
Use smp_processor_id() instead.
Detalles técnicos trazas, registros y código del informe original
softirq: huh, entered softirq 3 NET_RX with preempt_count 00000100, exited with 00000101?
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: 0.12%
- Percentil entre todas las CVEs puntuadas: 2
- 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
- NVD-CWE-Other
Referencias
- https://git.kernel.org/stable/c/4b3d54a85bd37ebf2d9836f0d0de775c0ff21af9
- https://git.kernel.org/stable/c/9e0f091821571f0da387462803ee42f0bb157582
- https://git.kernel.org/stable/c/b7e91827e1cf89cd34ad11dc8f8c010b70ab786e
- https://git.kernel.org/stable/c/dca4ea596a3b0a1b82bc1d9f3e4d88bd9ad9561f
- https://git.kernel.org/stable/c/fa5d5baf67f619c7aa70697a194b5a9edd9f5bb7
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni40e: Fix preempt count leak in napi poll tracepoint\n\nUsing get_cpu() in the tracepoint assignment causes an obvious preempt\ncount leak because nothing invokes put_cpu() to undo it:\n\n softirq: huh, entered softirq 3 NET_RX with preempt_count 00000100, exited with 00000101?\n\nThis clearly has seen a lot of testing in the last 3+ years...\n\nUse smp_processor_id() instead."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ni40e: Solución a la fuga del contador de preemption en el tracepoint de sondeo de napi\n\nUsar get_cpu() en la asignación del tracepoint causa una fuga obvia del contador de preemption porque nada invoca put_cpu() para deshacerlo:\n\n'softirq: eh, entró en softirq 3 NET_RX con preempt_count 00000100, salió con 00000101?'\n\nEsto claramente ha sido sometido a muchas pruebas en los últimos 3+ años...\n\nUsar smp_processor_id() en su lugar."
}
],
"lastModified": "2026-06-17T10:21:18.617",
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