CVE-2022-50126
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
jbd2: fix assertion 'jh->b_frozen_data == NULL' failure when journal aborted
Following process will fail assertion 'jh->b_frozen_data == NULL' in jbd2_journal_dirty_metadata():
After journal aborting, __jbd2_journal_refile_buffer() is executed with holding @jh->b_state_lock, we can fix it by moving 'is_handle_aborted()' into the area protected by @jh->b_state_lock.
Detalles técnicos trazas, registros y código del informe original
jbd2_journal_commit_transaction
unlink(dir/a)
jh->b_transaction = trans1
jh->b_jlist = BJ_Metadata
journal->j_running_transaction = NULL
trans1->t_state = T_COMMIT
unlink(dir/b)
handle->h_trans = trans2
do_get_write_access
jh->b_modified = 0
jh->b_frozen_data = frozen_buffer
jh->b_next_transaction = trans2
jbd2_journal_dirty_metadata
is_handle_aborted
is_journal_aborted // return false
--> jbd2 abort <--
while (commit_transaction->t_buffers)
if (is_journal_aborted)
jbd2_journal_refile_buffer
__jbd2_journal_refile_buffer
WRITE_ONCE(jh->b_transaction,
jh->b_next_transaction)
WRITE_ONCE(jh->b_next_transaction, NULL)
__jbd2_journal_file_buffer(jh, BJ_Reserved)
J_ASSERT_JH(jh, jh->b_frozen_data == NULL) // assertion failure !
The reproducer (See detail in [Link]) reports:
------------[ cut here ]------------
kernel BUG at fs/jbd2/transaction.c:1629!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 2 PID: 584 Comm: unlink Tainted: G W
5.19.0-rc6-00115-g4a57a8400075-dirty #697
RIP: 0010:jbd2_journal_dirty_metadata+0x3c5/0x470
RSP: 0018:ffffc90000be7ce0 EFLAGS: 00010202
Call Trace:
<TASK>
__ext4_handle_dirty_metadata+0xa0/0x290
ext4_handle_dirty_dirblock+0x10c/0x1d0
ext4_delete_entry+0x104/0x200
__ext4_unlink+0x22b/0x360
ext4_unlink+0x275/0x390
vfs_unlink+0x20b/0x4c0
do_unlinkat+0x42f/0x4c0
__x64_sys_unlink+0x37/0x50
do_syscall_64+0x35/0x80CVSS
- 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: 0.19%
- Percentil entre todas las CVEs puntuadas: 8
- 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
- CWE-617
Referencias
- https://git.kernel.org/stable/c/0f61c6dc4b714be9d79cf0782ca02ba01c1b7ac3
- https://git.kernel.org/stable/c/4a734f0869f970b8a9b65062ea40b09a5da9dba8
- https://git.kernel.org/stable/c/6073389db83b903678a0920554fa19f5bdc51c48
- https://git.kernel.org/stable/c/731c1662d838fe954c6759e3ee43229b0d928fe4
- https://git.kernel.org/stable/c/ddd896792e1718cb84c96f3e618270589b6886dc
- https://git.kernel.org/stable/c/e62f79827784f56499a50ea2e893c98317b5407b
- https://git.kernel.org/stable/c/f7161d0da975adc234161cd0641d0e484f5ce375
- https://git.kernel.org/stable/c/fa5b65d39332fef7a11ae99cb1f0696012a61527
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\njbd2: fix assertion 'jh->b_frozen_data == NULL' failure when journal aborted\n\nFollowing process will fail assertion 'jh->b_frozen_data == NULL' in\njbd2_journal_dirty_metadata():\n\n jbd2_journal_commit_transaction\nunlink(dir/a)\n jh->b_transaction = trans1\n jh->b_jlist = BJ_Metadata\n journal->j_running_transaction = NULL\n trans1->t_state = T_COMMIT\nunlink(dir/b)\n handle->h_trans = trans2\n do_get_write_access\n jh->b_modified = 0\n jh->b_frozen_data = frozen_buffer\n jh->b_next_transaction = trans2\n jbd2_journal_dirty_metadata\n is_handle_aborted\n is_journal_aborted // return false\n\n --> jbd2 abort <--\n\n while (commit_transaction->t_buffers)\n if (is_journal_aborted)\n jbd2_journal_refile_buffer\n __jbd2_journal_refile_buffer\n WRITE_ONCE(jh->b_transaction,\n\t\t\t\t\t\tjh->b_next_transaction)\n WRITE_ONCE(jh->b_next_transaction, NULL)\n __jbd2_journal_file_buffer(jh, BJ_Reserved)\n J_ASSERT_JH(jh, jh->b_frozen_data == NULL) // assertion failure !\n\nThe reproducer (See detail in [Link]) reports:\n ------------[ cut here ]------------\n kernel BUG at fs/jbd2/transaction.c:1629!\n invalid opcode: 0000 [#1] PREEMPT SMP\n CPU: 2 PID: 584 Comm: unlink Tainted: G W\n 5.19.0-rc6-00115-g4a57a8400075-dirty #697\n RIP: 0010:jbd2_journal_dirty_metadata+0x3c5/0x470\n RSP: 0018:ffffc90000be7ce0 EFLAGS: 00010202\n Call Trace:\n <TASK>\n __ext4_handle_dirty_metadata+0xa0/0x290\n ext4_handle_dirty_dirblock+0x10c/0x1d0\n ext4_delete_entry+0x104/0x200\n __ext4_unlink+0x22b/0x360\n ext4_unlink+0x275/0x390\n vfs_unlink+0x20b/0x4c0\n do_unlinkat+0x42f/0x4c0\n __x64_sys_unlink+0x37/0x50\n do_syscall_64+0x35/0x80\n\nAfter journal aborting, __jbd2_journal_refile_buffer() is executed with\nholding @jh->b_state_lock, we can fix it by moving 'is_handle_aborted()'\ninto the area protected by @jh->b_state_lock."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: jbd2: se corrige el error de aserción 'jh->b_frozen_data == NULL' cuando se aborta el diario El siguiente proceso fallará la aserción 'jh->b_frozen_data == NULL' en jbd2_journal_dirty_metadata(): jbd2_journal_commit_transaction unlink(dir/a) jh->b_transaction = trans1 jh->b_jlist = BJ_Metadata journal->j_running_transaction = NULL trans1->t_state = T_COMMIT unlink(dir/b) handle->h_trans = trans2 do_get_write_access jh->b_modified = 0 jh->b_frozen_data = frozen_buffer jh->b_next_transaction = trans2 jbd2_journal_dirty_metadata is_handle_aborted is_journal_aborted // devuelve falso --> jbd2 abort <-- while (commit_transaction->t_buffers) if (is_journal_aborted) jbd2_journal_refile_buffer __jbd2_journal_refile_buffer WRITE_ONCE(jh->b_transaction, jh->b_next_transaction) WRITE_ONCE(jh->b_next_transaction, NULL) __jbd2_journal_file_buffer(jh, BJ_Reserved) J_ASSERT_JH(jh, jh->b_frozen_data == NULL) // ¡Fallo de aserción! El reproductor (ver detalles en [Enlace]) informa: ------------[ cortar aquí ]------------ ¡ERROR del kernel en fs/jbd2/transaction.c:1629! código de operación no válido: 0000 [#1] PREEMPT SMP CPU: 2 PID: 584 Comm: desvincular Contaminado: GW 5.19.0-rc6-00115-g4a57a8400075-dirty #697 RIP: 0010:jbd2_journal_dirty_metadata+0x3c5/0x470 RSP: 0018:ffffc90000be7ce0 EFLAGS: 00010202 Rastreo de llamadas: __ext4_handle_dirty_metadata+0xa0/0x290 ext4_handle_dirty_dirblock+0x10c/0x1d0 ext4_delete_entry+0x104/0x200 __ext4_unlink+0x22b/0x360 ext4_unlink+0x275/0x390 vfs_unlink+0x20b/0x4c0 do_unlinkat+0x42f/0x4c0 __x64_sys_unlink+0x37/0x50 do_syscall_64+0x35/0x80 Después de abortar el diario, se ejecuta __jbd2_journal_refile_buffer() manteniendo presionado @jh->b_state_lock. Podemos solucionarlo moviendo 'is_handle_aborted()' al área protegida por @jh->b_state_lock."
}
],
"lastModified": "2026-06-17T05:22:48.843",
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