CVE-2026-98623
Estado: RecibidaSin puntuar—
Gravedad—Sin puntuar
Probabilidad de explotación0.18 %mayor que el 7 % de las CVE
Explotación activaNono figura en el catálogo de CISA
Exploit públicoNo conocidosin código público localizado
En el kernel de Linux se ha resuelto la siguiente vulnerabilidad:
drm/nouveau/clk: fix list cursor use after loop in nvkm_clk_ustate_update
Si list_for_each_entry() termina sin llegar a un break, entonces "pstate" no es un puntero de pstate válido. Se introduce en su lugar una variable "found".
La comprobación es alcanzable desde el espacio de usuario: nvkm_clk_ustate_update() toma el identificador de pstate directamente del archivo de debugfs "pstate", por lo que solicitar un identificador que no está en clk->states (o cualquier identificador cuando las tablas de rendimiento están rotas y la lista está vacía) hace que la prueba pstate->pstate != req desreferencie la cabeza de la lista convertida en una estructura nvkm_pstate, lo que supone una lectura fuera de límites.
Leer descripción completaMostrar menos
[Francesco: rebased on drm-misc-next, expanded the commit message]
Traducción automática del texto original de NVD (en inglés).
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días
- 0.18 %
- Percentil entre todas las CVEs puntuadas
- 7
- Fecha de la puntuación
- 20/10/2026
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)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
Mostrar las 8 referencias
- https://git.kernel.org/stable/c/0d096a7f7d79207490858dde731b16da5337e90c
- https://git.kernel.org/stable/c/391517da7fd54ae40e4a7fe1cc696217343b0061
- https://git.kernel.org/stable/c/492e9cfa12f35f7946ea1b78a19f1f9337d62248
- https://git.kernel.org/stable/c/5315c7bacfe274ddfe649d9556e9a341ffa812da
- https://git.kernel.org/stable/c/9d550924961f61a491dd95359c63494fa8a23d9f
- https://git.kernel.org/stable/c/a867abcfa85ab487066c3d3008a1ba905da04113
- https://git.kernel.org/stable/c/aff09d9e37e02dc60bde79035ac15b136d602259
- https://git.kernel.org/stable/c/db5dd9f47b4df1be322f498d846e9a82940a7390
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-98623",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7c856522069755ab9d163a24ac332cd3cb35fe30",
"lessThan": "db5dd9f47b4df1be322f498d846e9a82940a7390",
"versionType": "git"
},
{
"status": "affected",
"version": "7c856522069755ab9d163a24ac332cd3cb35fe30",
"lessThan": "9d550924961f61a491dd95359c63494fa8a23d9f",
"versionType": "git"
},
{
"status": "affected",
"version": "7c856522069755ab9d163a24ac332cd3cb35fe30",
"lessThan": "492e9cfa12f35f7946ea1b78a19f1f9337d62248",
"versionType": "git"
},
{
"status": "affected",
"version": "7c856522069755ab9d163a24ac332cd3cb35fe30",
"lessThan": "a867abcfa85ab487066c3d3008a1ba905da04113",
"versionType": "git"
},
{
"status": "affected",
"version": "7c856522069755ab9d163a24ac332cd3cb35fe30",
"lessThan": "5315c7bacfe274ddfe649d9556e9a341ffa812da",
"versionType": "git"
},
{
"status": "affected",
"version": "7c856522069755ab9d163a24ac332cd3cb35fe30",
"lessThan": "0d096a7f7d79207490858dde731b16da5337e90c",
"versionType": "git"
},
{
"status": "affected",
"version": "7c856522069755ab9d163a24ac332cd3cb35fe30",
"lessThan": "391517da7fd54ae40e4a7fe1cc696217343b0061",
"versionType": "git"
},
{
"status": "affected",
"version": "7c856522069755ab9d163a24ac332cd3cb35fe30",
"lessThan": "aff09d9e37e02dc60bde79035ac15b136d602259",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.55",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-10-18T16:17:15.237",
"references": [
{
"url": "https://git.kernel.org/stable/c/0d096a7f7d79207490858dde731b16da5337e90c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/391517da7fd54ae40e4a7fe1cc696217343b0061",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/492e9cfa12f35f7946ea1b78a19f1f9337d62248",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/5315c7bacfe274ddfe649d9556e9a341ffa812da",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9d550924961f61a491dd95359c63494fa8a23d9f",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a867abcfa85ab487066c3d3008a1ba905da04113",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/aff09d9e37e02dc60bde79035ac15b136d602259",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/db5dd9f47b4df1be322f498d846e9a82940a7390",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau/clk: fix list cursor use after loop in nvkm_clk_ustate_update\n\nIf list_for_each_entry() exits without hitting a break then \"pstate\" is\nnot a valid pstate pointer. Introduce a \"found\" variable instead.\n\nThe check is reachable from userspace: nvkm_clk_ustate_update() takes the\npstate id straight from the 'pstate' debugfs file, so requesting an id\nthat is not in clk->states - or any id at all when the perf tables are\nbroken and the list is empty - makes the pstate->pstate != req test\ndereference the list head cast to a struct nvkm_pstate, which is an\nout-of-bounds read.\n\n[Francesco: rebased on drm-misc-next, expanded the commit message]"
}
],
"lastModified": "2026-10-19T10:19:26.460",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}