CVE-2026-98725
Estado: RecibidaSin puntuar—
Gravedad—Sin puntuar
Probabilidad de explotación0.20 %mayor que el 9 % 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:
nvmet-auth: corrige la escritura fuera de límites en nvmet_auth_challenge()
nvmet_auth_challenge() recibe su búfer de salida como un puntero void. Por ello, sizeof(*d) se evalúa como uno con GCC y subestima la cabecera fija del desafío en 15 bytes. Un búfer AUTH_RECEIVE corto puede superar la comprobación antes de que el desafío se copie más allá del final de su asignación.
Use el puntero tipado del desafío al calcular el tamaño de la respuesta.
Detalles técnicos trazas, registros y código del informe original
BUG: KASAN: slab-out-of-bounds in nvmet_execute_auth_receive (drivers/nvme/target/fabrics-cmd-auth.c:442 drivers/nvme/target/fabrics-cmd-auth.c:569) Write of size 32 by task kworker/1:1H/64 Workqueue: nvmet_tcp_wq nvmet_tcp_io_work Call Trace: nvmet_execute_auth_receive (drivers/nvme/target/fabrics-cmd-auth.c:442 drivers/nvme/target/fabrics-cmd-auth.c:569) nvmet_tcp_try_recv_pdu (drivers/nvme/target/tcp.c:1119 drivers/nvme/target/tcp.c:1243) nvmet_tcp_io_work (drivers/nvme/target/tcp.c:1350 drivers/nvme/target/tcp.c:1382 drivers/nvme/target/tcp.c:1445) process_one_work (kernel/workqueue.c:3322) worker_thread (kernel/workqueue.c:3405 kernel/workqueue.c:3486) kthread (kernel/kthread.c:436) ret_from_fork (arch/x86/kernel/process.c:158) ret_from_fork_asm (arch/x86/entry/entry_64.S:245) The buggy address is located 16 bytes inside of allocated 33-byte region [ffff888000554e80, ffff888000554ea1) Kernel panic - not syncing: KASAN: panic_on_warn set ...
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
- 0.20 %
- Percentil entre todas las CVEs puntuadas
- 9
- 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 4 referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-98725",
"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": "db1312dd95488b5e6ff362ff66fcf953a46b1821",
"lessThan": "9d61131acd742cf97ee64e453383e41b46568513",
"versionType": "git"
},
{
"status": "affected",
"version": "db1312dd95488b5e6ff362ff66fcf953a46b1821",
"lessThan": "7fd3c363eba4f2aceb4b3f31cd1cf65e0dcbaee4",
"versionType": "git"
},
{
"status": "affected",
"version": "db1312dd95488b5e6ff362ff66fcf953a46b1821",
"lessThan": "8a9b4c0eef19c207663c1ee888257307c869ca86",
"versionType": "git"
},
{
"status": "affected",
"version": "db1312dd95488b5e6ff362ff66fcf953a46b1821",
"lessThan": "fa6778e030bed9841ddcdf96bc7018da9ac03562",
"versionType": "git"
}
],
"programFiles": [
"drivers/nvme/target/fabrics-cmd-auth.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/nvme/target/fabrics-cmd-auth.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-10-18T16:17:26.120",
"references": [
{
"url": "https://git.kernel.org/stable/c/7fd3c363eba4f2aceb4b3f31cd1cf65e0dcbaee4",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/8a9b4c0eef19c207663c1ee888257307c869ca86",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9d61131acd742cf97ee64e453383e41b46568513",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/fa6778e030bed9841ddcdf96bc7018da9ac03562",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()\n\nnvmet_auth_challenge() receives its output buffer as a void pointer.\nsizeof(*d) therefore evaluates to one with GCC and undercounts the fixed\nchallenge header by 15 bytes. A short AUTH_RECEIVE buffer can pass the\ncheck before the challenge is copied past the end of its allocation.\n\nUse the typed challenge pointer when calculating the response size.\n\n BUG: KASAN: slab-out-of-bounds in nvmet_execute_auth_receive (drivers/nvme/target/fabrics-cmd-auth.c:442 drivers/nvme/target/fabrics-cmd-auth.c:569)\n Write of size 32 by task kworker/1:1H/64\n Workqueue: nvmet_tcp_wq nvmet_tcp_io_work\n Call Trace:\n nvmet_execute_auth_receive (drivers/nvme/target/fabrics-cmd-auth.c:442 drivers/nvme/target/fabrics-cmd-auth.c:569)\n nvmet_tcp_try_recv_pdu (drivers/nvme/target/tcp.c:1119 drivers/nvme/target/tcp.c:1243)\n nvmet_tcp_io_work (drivers/nvme/target/tcp.c:1350 drivers/nvme/target/tcp.c:1382 drivers/nvme/target/tcp.c:1445)\n process_one_work (kernel/workqueue.c:3322)\n worker_thread (kernel/workqueue.c:3405 kernel/workqueue.c:3486)\n kthread (kernel/kthread.c:436)\n ret_from_fork (arch/x86/kernel/process.c:158)\n ret_from_fork_asm (arch/x86/entry/entry_64.S:245)\n The buggy address is located 16 bytes inside of\n allocated 33-byte region [ffff888000554e80, ffff888000554ea1)\n Kernel panic - not syncing: KASAN: panic_on_warn set ..."
}
],
"lastModified": "2026-10-19T10:19:36.680",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}