CVE-2025-38466
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
perf: Revert to requiring CAP_SYS_ADMIN for uprobes
Jann reports that uprobes can be used destructively when used in the middle of an instruction. The kernel only verifies there is a valid instruction at the requested offset, but due to variable instruction length cannot determine if this is an instruction as seen by the intended execution stream.
Additionally, Mark Rutland notes that on architectures that mix data in the text segment (like arm64), a similar things can be done if the data word is 'mistaken' for an instruction.
As such, require CAP_SYS_ADMIN for uprobes.
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: 0.19%
- Percentil entre todas las CVEs puntuadas: 8
- 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 (2)
CWE
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/183bdb89af1b5193b1d1d9316986053b15ca6fa4
- https://git.kernel.org/stable/c/8e8bf7bc6aa6f583336c2fda280b6cea0aed5612
- https://git.kernel.org/stable/c/a0a8009083e569b5526c64f7d3f2a62baca95164
- https://git.kernel.org/stable/c/ba677dbe77af5ffe6204e0f3f547f3ba059c6302
- https://git.kernel.org/stable/c/c0aec35f861fa746ca45aa816161c74352e6ada8
- https://git.kernel.org/stable/c/d5074256b642cdeb46a70ce2f15193e766edca68
- https://git.kernel.org/stable/c/d7ef1afd5b3f43f4924326164cee5397b66abd9c
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf: Revert to requiring CAP_SYS_ADMIN for uprobes\n\nJann reports that uprobes can be used destructively when used in the\nmiddle of an instruction. The kernel only verifies there is a valid\ninstruction at the requested offset, but due to variable instruction\nlength cannot determine if this is an instruction as seen by the\nintended execution stream.\n\nAdditionally, Mark Rutland notes that on architectures that mix data\nin the text segment (like arm64), a similar things can be done if the\ndata word is 'mistaken' for an instruction.\n\nAs such, require CAP_SYS_ADMIN for uprobes."
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: perf: Revertir al requisito de CAP_SYS_ADMIN para uprobes. Jann informa que los uprobes pueden usarse de forma destructiva cuando se usan en medio de una instrucción. El kernel solo verifica que haya una instrucción válida en el desplazamiento solicitado, pero debido a la longitud variable de la instrucción, no puede determinar si se trata de una instrucción como la detecta el flujo de ejecución previsto. Además, Mark Rutland señala que en arquitecturas que mezclan datos en el segmento de texto (como arm64), se puede realizar una acción similar si la palabra de datos se confunde con una instrucción. Por lo tanto, se requiere CAP_SYS_ADMIN para uprobes."
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