CVE-2022-49248
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
ALSA: firewire-lib: fix uninitialized flag for AV/C deferred transaction
AV/C deferred transaction was supported at a commit 00a7bb81c20f ("ALSA: firewire-lib: Add support for deferred transaction") while 'deferrable' flag can be uninitialized for non-control/notify AV/C transactions. UBSAN reports it:
This commit fixes the bug. The bug has no disadvantage for the non- control/notify AV/C transactions since the flag has an effect for AV/C response with INTERIM (0x0f) status which is not used for the transactions in AV/C general specification.
Detalles técnicos trazas, registros y código del informe original
kernel: ================================================================================ kernel: UBSAN: invalid-load in /build/linux-aa0B4d/linux-5.15.0/sound/firewire/fcp.c:363:9 kernel: load of value 158 is not a valid value for type '_Bool' kernel: CPU: 3 PID: 182227 Comm: irq/35-firewire Tainted: P OE 5.15.0-18-generic #18-Ubuntu kernel: Hardware name: Gigabyte Technology Co., Ltd. AX370-Gaming 5/AX370-Gaming 5, BIOS F42b 08/01/2019 kernel: Call Trace: kernel: <IRQ> kernel: show_stack+0x52/0x58 kernel: dump_stack_lvl+0x4a/0x5f kernel: dump_stack+0x10/0x12 kernel: ubsan_epilogue+0x9/0x45 kernel: __ubsan_handle_load_invalid_value.cold+0x44/0x49 kernel: fcp_response.part.0.cold+0x1a/0x2b [snd_firewire_lib] kernel: fcp_response+0x28/0x30 [snd_firewire_lib] kernel: fw_core_handle_request+0x230/0x3d0 [firewire_core] kernel: handle_ar_packet+0x1d9/0x200 [firewire_ohci] kernel: ? handle_ar_packet+0x1d9/0x200 [firewire_ohci] kernel: ? transmit_complete_callback+0x9f/0x120 [firewire_core] kernel: ar_context_tasklet+0xa8/0x2e0 [firewire_ohci] kernel: tasklet_action_common.constprop.0+0xea/0xf0 kernel: tasklet_action+0x22/0x30 kernel: __do_softirq+0xd9/0x2e3 kernel: ? irq_finalize_oneshot.part.0+0xf0/0xf0 kernel: do_softirq+0x75/0xa0 kernel: </IRQ> kernel: <TASK> kernel: __local_bh_enable_ip+0x50/0x60 kernel: irq_forced_thread_fn+0x7e/0x90 kernel: irq_thread+0xba/0x190 kernel: ? irq_thread_fn+0x60/0x60 kernel: kthread+0x11e/0x140 kernel: ? irq_thread_check_affinity+0xf0/0xf0 kernel: ? set_kthread_struct+0x50/0x50 kernel: ret_from_fork+0x22/0x30 kernel: </TASK> kernel: ================================================================================
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: 0.27%
- Percentil entre todas las CVEs puntuadas: 17
- 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-908
Referencias
- https://git.kernel.org/stable/c/39d2c4a33dc1b4402cec68a3c8f82c6588b6edce
- https://git.kernel.org/stable/c/60e5d391805d70458a01998de00d0c28cba40bf3
- https://git.kernel.org/stable/c/7025f40690a235a118c87674cfb93072694aa66d
- https://git.kernel.org/stable/c/7e6f5786621df060f8296f074efd275eaf20361a
- https://git.kernel.org/stable/c/99582e4b19f367fa95bdd150b3034d7ce8113342
- https://git.kernel.org/stable/c/b2b65c9013dc28836d82e25d0f0c94d794a14aba
- https://git.kernel.org/stable/c/bf0cd60b7e33cf221fbe1114e4acb2c828b0af0d
- https://git.kernel.org/stable/c/d07e4bbaff6fbba6f70c04b092ea7d9afcdf392e
- https://git.kernel.org/stable/c/eab74c41612083bd627b60da650e19234e4f1051
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: firewire-lib: fix uninitialized flag for AV/C deferred transaction\n\nAV/C deferred transaction was supported at a commit 00a7bb81c20f (\"ALSA:\nfirewire-lib: Add support for deferred transaction\") while 'deferrable'\nflag can be uninitialized for non-control/notify AV/C transactions.\nUBSAN reports it:\n\nkernel: ================================================================================\nkernel: UBSAN: invalid-load in /build/linux-aa0B4d/linux-5.15.0/sound/firewire/fcp.c:363:9\nkernel: load of value 158 is not a valid value for type '_Bool'\nkernel: CPU: 3 PID: 182227 Comm: irq/35-firewire Tainted: P OE 5.15.0-18-generic #18-Ubuntu\nkernel: Hardware name: Gigabyte Technology Co., Ltd. AX370-Gaming 5/AX370-Gaming 5, BIOS F42b 08/01/2019\nkernel: Call Trace:\nkernel: <IRQ>\nkernel: show_stack+0x52/0x58\nkernel: dump_stack_lvl+0x4a/0x5f\nkernel: dump_stack+0x10/0x12\nkernel: ubsan_epilogue+0x9/0x45\nkernel: __ubsan_handle_load_invalid_value.cold+0x44/0x49\nkernel: fcp_response.part.0.cold+0x1a/0x2b [snd_firewire_lib]\nkernel: fcp_response+0x28/0x30 [snd_firewire_lib]\nkernel: fw_core_handle_request+0x230/0x3d0 [firewire_core]\nkernel: handle_ar_packet+0x1d9/0x200 [firewire_ohci]\nkernel: ? handle_ar_packet+0x1d9/0x200 [firewire_ohci]\nkernel: ? transmit_complete_callback+0x9f/0x120 [firewire_core]\nkernel: ar_context_tasklet+0xa8/0x2e0 [firewire_ohci]\nkernel: tasklet_action_common.constprop.0+0xea/0xf0\nkernel: tasklet_action+0x22/0x30\nkernel: __do_softirq+0xd9/0x2e3\nkernel: ? irq_finalize_oneshot.part.0+0xf0/0xf0\nkernel: do_softirq+0x75/0xa0\nkernel: </IRQ>\nkernel: <TASK>\nkernel: __local_bh_enable_ip+0x50/0x60\nkernel: irq_forced_thread_fn+0x7e/0x90\nkernel: irq_thread+0xba/0x190\nkernel: ? irq_thread_fn+0x60/0x60\nkernel: kthread+0x11e/0x140\nkernel: ? irq_thread_check_affinity+0xf0/0xf0\nkernel: ? set_kthread_struct+0x50/0x50\nkernel: ret_from_fork+0x22/0x30\nkernel: </TASK>\nkernel: ================================================================================\n\nThis commit fixes the bug. The bug has no disadvantage for the non-\ncontrol/notify AV/C transactions since the flag has an effect for AV/C\nresponse with INTERIM (0x0f) status which is not used for the transactions\nin AV/C general specification."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ALSA: firewire-lib: corrige el indicador no inicializado para las transacciones diferidas de AV/C. Las transacciones diferidas de AV/C tenían soporte en una confirmación 00a7bb81c20f (\"ALSA: firewire-lib: agregar soporte para transacciones diferidas\"), mientras que el indicador 'diferible' se puede desinicializar para transacciones AV/C que no sean de control/notificación. UBSAN lo informa: kernel: == ... 5/AX370-Gaming 5, BIOS F42b 01/08/2019 núcleo: Seguimiento de llamadas: núcleo: kernel: show_stack+0x52/0x58 kernel: dump_stack_lvl+0x4a/0x5f kernel: dump_stack+0x10/0x12 kernel: ubsan_epilogue+0x9/0x45 kernel: __ubsan_handle_load_invalid_value.cold+0x44/0x49 kernel: fcp_response.part.0.cold+0x1a/0x2b [snd_firewire_lib] kernel: fcp_response+0x28/0x30 [snd_firewire_lib] kernel: fw_core_handle_request+0x230/0x3d0 [firewire_core] kernel: handle_ar_packet+0x1d9/0x200 [firewire_ohci] kernel: ? handle_ar_packet+0x1d9/0x200 [firewire_ohci] kernel: ? transmit_complete_callback+0x9f/0x120 [firewire_core] kernel: ar_context_tasklet+0xa8/0x2e0 [firewire_ohci] kernel: tasklet_action_common.constprop.0+0xea/0xf0 kernel: tasklet_action+0x22/0x30 kernel: __do_softirq+0xd9/0x2e3 kernel: ? irq_finalize_oneshot.part.0+0xf0/0xf0 kernel: do_softirq+0x75/0xa0 kernel: kernel: kernel: __local_bh_enable_ip+0x50/0x60 kernel: irq_forced_thread_fn+0x7e/0x90 kernel: irq_thread+0xba/0x190 kernel: ? irq_thread_fn+0x60/0x60 kernel: kthread+0x11e/0x140 kernel: ? irq_thread_check_affinity+0xf0/0xf0 kernel: ? set_kthread_struct+0x50/0x50 kernel: ret_from_fork+0x22/0x30 kernel: kernel: ================================================================================\nEsta confirmación corrige el error. El error no tiene ninguna desventaja para las transacciones AV/C que no son de control/notificación, ya que el indicador tiene un efecto para la respuesta AV/C con estado INTERIM (0x0f), que no se utiliza para las transacciones en la especificación general AV/C."
}
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"lastModified": "2026-06-17T05:17:30.440",
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