CVE-2023-52618
Estado: AnalizadaMedia (5.3)—
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: block/rnbd-srv: Comprueba si hay un desbordamiento de cadena improbable. Dado que "dev_search_path" técnicamente puede ser tan grande como PATH_MAX, existía el riesgo de truncamiento al copiarlo y una segunda cadena en " full_path" ya que también tenía un tamaño PATH_MAX.
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Las compilaciones W=1 informaban esta advertencia: drivers/block/rnbd/rnbd-srv.c: En función 'process_msg_open.isra': drivers/block/rnbd/rnbd-srv.c:616:51: advertencia: '% La salida de la directiva s se puede truncar escribiendo hasta 254 bytes en una región de tamaño entre 0 y 4095 [-Wformat-truncation=] 616 | snprintf(full_path, PATH_MAX, "%s/%s", | ^~ En la función 'rnbd_srv_get_full_path', insertada desde 'process_msg_open.isra' en drivers/block/rnbd/rnbd-srv.c:721:14: drivers/block /rnbd/rnbd-srv.c:616:17: nota: 'snprintf' genera entre 2 y 4351 bytes en un destino de tamaño 4096 616 | snprintf(full_path, PATH_MAX, "%s/%s", | ^~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 617 | dev_search_path, dev_name); | ~~~~~~~ ~~~~~~~~~~~~~~~~~~~ Para solucionar este problema, verifique incondicionalmente el truncamiento (como ya se hizo en el caso en el que "%SESSNAME%" estaba presente).
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Puntuación base: 5.3
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.74%
- Percentil entre todas las CVEs puntuadas: 53
- Fecha de la puntuación: 8/10/2026
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/5b9ea86e662035a886ccb5c76d56793cba618827
- https://git.kernel.org/stable/c/95bc866c11974d3e4a9d922275ea8127ff809cf7
- https://git.kernel.org/stable/c/9e4bf6a08d1e127bcc4bd72557f2dfafc6bc7f41
- https://git.kernel.org/stable/c/a2c6206f18104fba7f887bf4dbbfe4c41adc4339
- https://git.kernel.org/stable/c/af7bbdac89739e2e7380387fda598848d3b7010f
- https://git.kernel.org/stable/c/f6abd5e17da33eba15df2bddc93413e76c2b55f7
- https://git.kernel.org/stable/c/5b9ea86e662035a886ccb5c76d56793cba618827
- https://git.kernel.org/stable/c/95bc866c11974d3e4a9d922275ea8127ff809cf7
- https://git.kernel.org/stable/c/9e4bf6a08d1e127bcc4bd72557f2dfafc6bc7f41
- https://git.kernel.org/stable/c/a2c6206f18104fba7f887bf4dbbfe4c41adc4339
- https://git.kernel.org/stable/c/af7bbdac89739e2e7380387fda598848d3b7010f
- https://git.kernel.org/stable/c/f6abd5e17da33eba15df2bddc93413e76c2b55f7
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock/rnbd-srv: Check for unlikely string overflow\n\nSince \"dev_search_path\" can technically be as large as PATH_MAX,\nthere was a risk of truncation when copying it and a second string\ninto \"full_path\" since it was also PATH_MAX sized. The W=1 builds were\nreporting this warning:\n\ndrivers/block/rnbd/rnbd-srv.c: In function 'process_msg_open.isra':\ndrivers/block/rnbd/rnbd-srv.c:616:51: warning: '%s' directive output may be truncated writing up to 254 bytes into a region of size between 0 and 4095 [-Wformat-truncation=]\n 616 | snprintf(full_path, PATH_MAX, \"%s/%s\",\n | ^~\nIn function 'rnbd_srv_get_full_path',\n inlined from 'process_msg_open.isra' at drivers/block/rnbd/rnbd-srv.c:721:14: drivers/block/rnbd/rnbd-srv.c:616:17: note: 'snprintf' output between 2 and 4351 bytes into a destination of size 4096\n 616 | snprintf(full_path, PATH_MAX, \"%s/%s\",\n | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n 617 | dev_search_path, dev_name);\n | ~~~~~~~~~~~~~~~~~~~~~~~~~~\n\nTo fix this, unconditionally check for truncation (as was already done\nfor the case where \"%SESSNAME%\" was present)."
},
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"value": "En el kernel de Linux, se resolvió la siguiente vulnerabilidad: block/rnbd-srv: Comprueba si hay un desbordamiento de cadena improbable. Dado que \"dev_search_path\" técnicamente puede ser tan grande como PATH_MAX, existía el riesgo de truncamiento al copiarlo y una segunda cadena en \" full_path\" ya que también tenía un tamaño PATH_MAX. Las compilaciones W=1 informaban esta advertencia: drivers/block/rnbd/rnbd-srv.c: En función 'process_msg_open.isra': drivers/block/rnbd/rnbd-srv.c:616:51: advertencia: '% La salida de la directiva s se puede truncar escribiendo hasta 254 bytes en una región de tamaño entre 0 y 4095 [-Wformat-truncation=] 616 | snprintf(full_path, PATH_MAX, \"%s/%s\", | ^~ En la función 'rnbd_srv_get_full_path', insertada desde 'process_msg_open.isra' en drivers/block/rnbd/rnbd-srv.c:721:14: drivers/block /rnbd/rnbd-srv.c:616:17: nota: 'snprintf' genera entre 2 y 4351 bytes en un destino de tamaño 4096 616 | snprintf(full_path, PATH_MAX, \"%s/%s\", | ^~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 617 | dev_search_path, dev_name); | ~~~~~~~ ~~~~~~~~~~~~~~~~~~~ Para solucionar este problema, verifique incondicionalmente el truncamiento (como ya se hizo en el caso en el que \"%SESSNAME%\" estaba presente)."
}
],
"lastModified": "2026-06-17T06:43:10.573",
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