CVE-2023-53094
Estado: ModificadaMedia (4.7)—
In the Linux kernel, the following vulnerability has been resolved:
tty: serial: fsl_lpuart: fix race on RX DMA shutdown
From time to time DMA completion can come in the middle of DMA shutdown:
<process ctx>: <IRQ>: lpuart32_shutdown() lpuart_dma_shutdown() del_timer_sync() lpuart_dma_rx_complete() lpuart_copy_rx_to_tty() mod_timer() lpuart_dma_rx_free()
When the timer fires a bit later, sport->dma_rx_desc is NULL:
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000004 pc : lpuart_copy_rx_to_tty+0xcc/0x5bc lr : lpuart_timer_func+0x1c/0x2c Call trace: lpuart_copy_rx_to_tty lpuart_timer_func call_timer_fn __run_timers.part.0 run_timer_softirq __do_softirq __irq_exit_rcu irq_exit handle_domain_irq gic_handle_irq call_on_irq_stack do_interrupt_handler ...
Leer descripción completaMostrar menos
To fix this fold del_timer_sync() into lpuart_dma_rx_free() after dmaengine_terminate_sync() to make sure timer will not be re-started in lpuart_copy_rx_to_tty() <= lpuart_dma_rx_complete().
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: 0.15%
- Percentil entre todas las CVEs puntuadas: 4
- 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-362
Referencias
- https://git.kernel.org/stable/c/19a98d56dfedafb25652bdb9cd48a4e73ceba702
- https://git.kernel.org/stable/c/1be6f2b15f902c02e055ae0b419ca789200473c9
- https://git.kernel.org/stable/c/2a36b444cace9580380467fd1183bb5e85bcc80a
- https://git.kernel.org/stable/c/90530e7214c8a04dcdde57502d93fa96af288c38
- https://git.kernel.org/stable/c/954fc9931f0aabf272b5674cf468affdd88d3a36
JSON original (NVD)
Mostrar
{
"id": "CVE-2023-53094",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Secondary",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.8,
"attackVector": "LOCAL",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 1.8
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 4.7,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "HIGH",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 1
}
]
},
"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": "4a8588a1cf867333187d9ff071e6fbdab587d194",
"lessThan": "19a98d56dfedafb25652bdb9cd48a4e73ceba702",
"versionType": "git"
},
{
"status": "affected",
"version": "4a8588a1cf867333187d9ff071e6fbdab587d194",
"lessThan": "90530e7214c8a04dcdde57502d93fa96af288c38",
"versionType": "git"
},
{
"status": "affected",
"version": "4a8588a1cf867333187d9ff071e6fbdab587d194",
"lessThan": "954fc9931f0aabf272b5674cf468affdd88d3a36",
"versionType": "git"
},
{
"status": "affected",
"version": "4a8588a1cf867333187d9ff071e6fbdab587d194",
"lessThan": "2a36b444cace9580380467fd1183bb5e85bcc80a",
"versionType": "git"
},
{
"status": "affected",
"version": "4a8588a1cf867333187d9ff071e6fbdab587d194",
"lessThan": "1be6f2b15f902c02e055ae0b419ca789200473c9",
"versionType": "git"
},
{
"status": "affected",
"version": "5716a781032693d0f812ed06528d98195e9df028",
"versionType": "git"
},
{
"status": "affected",
"version": "0d5cb6e8b4b62d8efd1a470615894276341d6db9",
"versionType": "git"
},
{
"status": "affected",
"version": "3.18.9",
"lessThan": "3.19",
"versionType": "semver"
},
{
"status": "affected",
"version": "3.19.1",
"lessThan": "3.20",
"versionType": "semver"
}
],
"programFiles": [
"drivers/tty/serial/fsl_lpuart.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.177",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.105",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.23",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.2.8",
"versionType": "semver",
"lessThanOrEqual": "6.2.*"
},
{
"status": "unaffected",
"version": "6.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/tty/serial/fsl_lpuart.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-05-02T16:15:28.363",
"references": [
{
"url": "https://git.kernel.org/stable/c/19a98d56dfedafb25652bdb9cd48a4e73ceba702",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/1be6f2b15f902c02e055ae0b419ca789200473c9",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/2a36b444cace9580380467fd1183bb5e85bcc80a",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/90530e7214c8a04dcdde57502d93fa96af288c38",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/954fc9931f0aabf272b5674cf468affdd88d3a36",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-362"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: fsl_lpuart: fix race on RX DMA shutdown\n\nFrom time to time DMA completion can come in the middle of DMA shutdown:\n\n<process ctx>:\t\t\t\t<IRQ>:\nlpuart32_shutdown()\n lpuart_dma_shutdown()\n del_timer_sync()\n\t\t\t\t\tlpuart_dma_rx_complete()\n\t\t\t\t\t lpuart_copy_rx_to_tty()\n\t\t\t\t\t mod_timer()\n lpuart_dma_rx_free()\n\nWhen the timer fires a bit later, sport->dma_rx_desc is NULL:\n\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000004\npc : lpuart_copy_rx_to_tty+0xcc/0x5bc\nlr : lpuart_timer_func+0x1c/0x2c\nCall trace:\n lpuart_copy_rx_to_tty\n lpuart_timer_func\n call_timer_fn\n __run_timers.part.0\n run_timer_softirq\n __do_softirq\n __irq_exit_rcu\n irq_exit\n handle_domain_irq\n gic_handle_irq\n call_on_irq_stack\n do_interrupt_handler\n ...\n\nTo fix this fold del_timer_sync() into lpuart_dma_rx_free() after\ndmaengine_terminate_sync() to make sure timer will not be re-started in\nlpuart_copy_rx_to_tty() <= lpuart_dma_rx_complete()."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tty: serial: fsl_lpuart: fix race on RX DMA shutting De vez en cuando, la finalización de DMA puede llegar en medio del shutting de DMA: : : lpuart32_shutdown() lpuart_dma_shutdown() del_timer_sync() lpuart_dma_rx_complete() lpuart_copy_rx_to_tty() mod_timer() lpuart_dma_rx_free() Cuando el temporizador se activa un poco más tarde, sport->dma_rx_desc es NULL: No se puede manejar la desreferencia del puntero NULL del kernel en la dirección virtual 0000000000000004 pc : lpuart_copy_rx_to_tty+0xcc/0x5bc lr : lpuart_timer_func+0x1c/0x2c Rastreo de llamadas: lpuart_copy_rx_to_tty lpuart_timer_func call_timer_fn __run_timers.part.0 run_timer_softirq __do_softirq __irq_exit_rcu irq_exit handle_domain_irq gic_handle_irq call_on_irq_stack do_interrupt_handler ... Para solucionar esto, incorpore del_timer_sync() en lpuart_dma_rx_free() después de dmaengine_terminate_sync() para asegurarse de que el temporizador no se reinicie en lpuart_copy_rx_to_tty() <= lpuart_dma_rx_complete()."
}
],
"lastModified": "2026-08-04T10:18:54.930",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "61CE8743-D751-40A8-950D-D06102297B58",
"versionEndExcluding": "3.19",
"versionStartIncluding": "3.18.9"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "81BB79F1-557B-4785-94D0-0DDD776FDC44",
"versionEndExcluding": "5.10.177",
"versionStartIncluding": "3.19.1"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0888AE70-CB0A-45C0-B9BD-A5371244C8DB",
"versionEndExcluding": "5.15.105",
"versionStartIncluding": "5.11"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C6396026-EF6B-4933-AF27-B3AFE6E5506D",
"versionEndExcluding": "6.1.23",
"versionStartIncluding": "5.16"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4011EC6B-7786-4709-B765-186FA31D6F7F",
"versionEndExcluding": "6.2.8",
"versionStartIncluding": "6.2"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B8E3B0E8-FA27-4305-87BB-AF6C25B160CB"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A47F0FC3-CE52-4BA1-BA51-22F783938431"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}