CVE-2024-50006
Estado: ModificadaMedia (4.7)—
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix i_data_sem unlock order in ext4_ind_migrate()
Fuzzing reports a possible deadlock in jbd2_log_wait_commit.
This issue is triggered when an EXT4_IOC_MIGRATE ioctl is set to require synchronous updates because the file descriptor is opened with O_SYNC. This can lead to the jbd2_journal_stop() function calling jbd2_might_wait_for_commit(), potentially causing a deadlock if the EXT4_IOC_MIGRATE call races with a write(2) system call.
This problem only arises when CONFIG_PROVE_LOCKING is enabled. In this case, the jbd2_might_wait_for_commit macro locks jbd2_handle in the jbd2_journal_stop function while i_data_sem is locked.
Leer descripción completaMostrar menos
This triggers lockdep because the jbd2_journal_start function might also lock the same jbd2_handle simultaneously.
Found by Linux Verification Center (linuxtesting.org) with syzkaller.
Rule: add
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 4.7
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 (1)
CWE
- CWE-667
Referencias
- https://git.kernel.org/stable/c/3c46d6060d3e38de22196c1fe7706c5a3c696285
- https://git.kernel.org/stable/c/4192adefc9c570698821c5eb9873320eac2fcbf1
- https://git.kernel.org/stable/c/53b1999cfd2c7addf2e581a32865fe8835467b44
- https://git.kernel.org/stable/c/6252cb6bde7fc76cb8dcb49d1def7c326b190820
- https://git.kernel.org/stable/c/9fedf51ab8cf7b69bff08f37fe0989fec7f5d870
- https://git.kernel.org/stable/c/cc749e61c011c255d81b192a822db650c68b313f
- https://git.kernel.org/stable/c/d43776b907659affef1de888525847d64b244194
- https://git.kernel.org/stable/c/d58a00e981d3118b91d503da263e640b7cde6729
- https://git.kernel.org/stable/c/ef05572da0c0eb89614ed01cc17d3c882bdbd1ff
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
JSON original (NVD)
Mostrar
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"vulnStatus": "Modified",
"weaknesses": [
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"type": "Primary",
"source": "nvd@nist.gov",
"description": [
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"value": "CWE-667"
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix i_data_sem unlock order in ext4_ind_migrate()\n\nFuzzing reports a possible deadlock in jbd2_log_wait_commit.\n\nThis issue is triggered when an EXT4_IOC_MIGRATE ioctl is set to require\nsynchronous updates because the file descriptor is opened with O_SYNC.\nThis can lead to the jbd2_journal_stop() function calling\njbd2_might_wait_for_commit(), potentially causing a deadlock if the\nEXT4_IOC_MIGRATE call races with a write(2) system call.\n\nThis problem only arises when CONFIG_PROVE_LOCKING is enabled. In this\ncase, the jbd2_might_wait_for_commit macro locks jbd2_handle in the\njbd2_journal_stop function while i_data_sem is locked. This triggers\nlockdep because the jbd2_journal_start function might also lock the same\njbd2_handle simultaneously.\n\nFound by Linux Verification Center (linuxtesting.org) with syzkaller.\n\nRule: add"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: se corrige el orden de desbloqueo de i_data_sem en ext4_ind_migrate() Fuzzing informa un posible bloqueo en jbd2_log_wait_commit. Este problema se activa cuando se configura un ioctl EXT4_IOC_MIGRATE para requerir actualizaciones sincrónicas porque el descriptor de archivo se abre con O_SYNC. Esto puede provocar que la función jbd2_journal_stop() llame a jbd2_might_wait_for_commit(), lo que puede provocar un bloqueo si la llamada a EXT4_IOC_MIGRATE compite con una llamada del sistema write(2). Este problema solo surge cuando CONFIG_PROVE_LOCKING está habilitado. En este caso, la macro jbd2_might_wait_for_commit bloquea jbd2_handle en la función jbd2_journal_stop mientras i_data_sem está bloqueado. Esto activa lockdep porque la función jbd2_journal_start también podría bloquear el mismo jbd2_handle simultáneamente. Encontrado por Linux Verification Center (linuxtesting.org) con syzkaller. Regla: add"
}
],
"lastModified": "2026-06-17T08:03:22.147",
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