CVE-2026-23271
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: perf: Fix __perf_event_overflow() vs perf_remove_from_context() race Make sure that __perf_event_overflow() runs with IRQs disabled for all possible callchains. Specifically the software events can end up running it with only preemption disabled. This opens up a race vs perf_event_exit_event() and friends that will go and free various things the overflow path expects to be present, like the BPF program.
Severity
HIGH
CVSS score
7.8
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-03-20 09:16:11.773000
Last modified
2026-10-19 19:17:44.297000
View original CVE JSON
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-03-20T09:16:11.773",
"lastModified": "2026-10-19T19:17:44.297",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf: Fix __perf_event_overflow() vs perf_remove_from_context() race\n\nMake sure that __perf_event_overflow() runs with IRQs disabled for all\npossible callchains. Specifically the software events can end up running\nit with only preemption disabled.\n\nThis opens up a race vs perf_event_exit_event() and friends that will go\nand free various things the overflow path expects to be present, like\nthe BPF program."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nperf: Corrección de la condición de carrera entre __perf_event_overflow() y perf_remove_from_context()\n\nAsegurar que __perf_event_overflow() se ejecute con las IRQ deshabilitadas para todas las cadenas de llamadas posibles. Específicamente, los eventos de software pueden terminar ejecutándolo con solo la preemption deshabilitada.\n\nEsto abre una condición de carrera frente a perf_event_exit_event() y funciones relacionadas que liberarán varias cosas que la ruta de desbordamiento espera que estén presentes, como el programa BPF."
}
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