CVE-2026-23121
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
mISDN: annotate data-race around dev->work
dev->work can re read locklessly in mISDN_read() and mISDN_poll(). Add READ_ONCE()/WRITE_ONCE() annotations.
value changed: 0x00000000 -> 0x00000001
Detalles técnicos trazas, registros y código del informe original
BUG: KCSAN: data-race in mISDN_ioctl / mISDN_read write to 0xffff88812d848280 of 4 bytes by task 10864 on cpu 1: misdn_add_timer drivers/isdn/mISDN/timerdev.c:175 [inline] mISDN_ioctl+0x2fb/0x550 drivers/isdn/mISDN/timerdev.c:233 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xce/0x140 fs/ioctl.c:583 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:583 x64_sys_call+0x14b0/0x3000 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd8/0x2c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff88812d848280 of 4 bytes by task 10857 on cpu 0: mISDN_read+0x1f2/0x470 drivers/isdn/mISDN/timerdev.c:112 do_loop_readv_writev fs/read_write.c:847 [inline] vfs_readv+0x3fb/0x690 fs/read_write.c:1020 do_readv+0xe7/0x210 fs/read_write.c:1080 __do_sys_readv fs/read_write.c:1165 [inline] __se_sys_readv fs/read_write.c:1162 [inline] __x64_sys_readv+0x45/0x50 fs/read_write.c:1162 x64_sys_call+0x2831/0x3000 arch/x86/include/generated/asm/syscalls_64.h:20 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd8/0x2c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f
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: 0.13%
- Percentil entre todas las CVEs puntuadas: 2
- Fecha de la puntuación: 5/10/2026
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)
CWE
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/13f3b3b87068898056db4c79ee67052fbde11d43
- https://git.kernel.org/stable/c/7ac345a93af31358e18e9606eb7b354691bf6757
- https://git.kernel.org/stable/c/8175dbf174d487afab81e936a862a8d9b8a1ccb6
- https://git.kernel.org/stable/c/aa6e33cd74ca4965f2bbcb025e0b672fb0168a69
- https://git.kernel.org/stable/c/accc3f8266d2a49881dbcf78c459477f4efa0ff3
- https://git.kernel.org/stable/c/d5d99cb9e0839093cd53aa3b28176fce2f820ca0
- https://git.kernel.org/stable/c/fc8ba17fd3337bd8b1913c30b95df0fee00d8fb7
JSON original (NVD)
Mostrar
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"version": "2.0.3",
"timestamp": "2026-06-10T20:40:15.361866Z"
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"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
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"impactScore": 3.6,
"exploitabilityScore": 1.8
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"description": [
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"value": "NVD-CWE-noinfo"
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmISDN: annotate data-race around dev->work\n\ndev->work can re read locklessly in mISDN_read()\nand mISDN_poll(). Add READ_ONCE()/WRITE_ONCE() annotations.\n\nBUG: KCSAN: data-race in mISDN_ioctl / mISDN_read\n\nwrite to 0xffff88812d848280 of 4 bytes by task 10864 on cpu 1:\n misdn_add_timer drivers/isdn/mISDN/timerdev.c:175 [inline]\n mISDN_ioctl+0x2fb/0x550 drivers/isdn/mISDN/timerdev.c:233\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:597 [inline]\n __se_sys_ioctl+0xce/0x140 fs/ioctl.c:583\n __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:583\n x64_sys_call+0x14b0/0x3000 arch/x86/include/generated/asm/syscalls_64.h:17\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xd8/0x2c0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nread to 0xffff88812d848280 of 4 bytes by task 10857 on cpu 0:\n mISDN_read+0x1f2/0x470 drivers/isdn/mISDN/timerdev.c:112\n do_loop_readv_writev fs/read_write.c:847 [inline]\n vfs_readv+0x3fb/0x690 fs/read_write.c:1020\n do_readv+0xe7/0x210 fs/read_write.c:1080\n __do_sys_readv fs/read_write.c:1165 [inline]\n __se_sys_readv fs/read_write.c:1162 [inline]\n __x64_sys_readv+0x45/0x50 fs/read_write.c:1162\n x64_sys_call+0x2831/0x3000 arch/x86/include/generated/asm/syscalls_64.h:20\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xd8/0x2c0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nvalue changed: 0x00000000 -> 0x00000001"
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmISDN: anotar condición de carrera de datos alrededor de dev->work\n\ndev->work puede ser releído sin bloqueo en mISDN_read() y mISDN_poll(). Añadir anotaciones READ_ONCE()/WRITE_ONCE().\n\nERROR: KCSAN: condición de carrera de datos en mISDN_ioctl / mISDN_read\n\nescritura en 0xffff88812d848280 de 4 bytes por la tarea 10864 en la CPU 1:\n misdn_add_timer drivers/isdn/mISDN/timerdev.c:175 [inline]\n mISDN_ioctl+0x2fb/0x550 drivers/isdn/mISDN/timerdev.c:233\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:597 [inline]\n __se_sys_ioctl+0xce/0x140 fs/ioctl.c:583\n __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:583\n x64_sys_call+0x14b0/0x3000 arch/x86/include/generated/asm/syscalls_64.h:17\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xd8/0x2c0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nlectura en 0xffff88812d848280 de 4 bytes por la tarea 10857 en la CPU 0:\n mISDN_read+0x1f2/0x470 drivers/isdn/mISDN/timerdev.c:112\n do_loop_readv_writev fs/read_write.c:847 [inline]\n vfs_readv+0x3fb/0x690 fs/read_write.c:1020\n do_readv+0xe7/0x210 fs/read_write.c:1080\n __do_sys_readv fs/read_write.c:1165 [inline]\n __se_sys_readv fs/read_write.c:1162 [inline]\n __x64_sys_readv+0x45/0x50 fs/read_write.c:1162\n x64_sys_call+0x2831/0x3000 arch/x86/include/generated/asm/syscalls_64.h:20\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xd8/0x2c0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nvalor cambiado: 0x00000000 -> 0x00000001"
}
],
"lastModified": "2026-06-17T10:20:56.193",
"configurations": [
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