CVE-2026-43471
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
scsi: ufs: core: Fix possible NULL pointer dereference in ufshcd_add_command_trace()
The kernel log indicates a crash in ufshcd_add_command_trace, due to a NULL pointer dereference when accessing hwq->id. This can happen if ufshcd_mcq_req_to_hwq() returns NULL.
This patch adds a NULL check for hwq before accessing its id field to prevent a kernel crash.
Detalles técnicos trazas, registros y código del informe original
Kernel log excerpt: [<ffffffd5d192dc4c>] notify_die+0x4c/0x8c [<ffffffd5d1814e58>] __die+0x60/0xb0 [<ffffffd5d1814d64>] die+0x4c/0xe0 [<ffffffd5d181575c>] die_kernel_fault+0x74/0x88 [<ffffffd5d1864db4>] __do_kernel_fault+0x314/0x318 [<ffffffd5d2a3cdf8>] do_page_fault+0xa4/0x5f8 [<ffffffd5d2a3cd34>] do_translation_fault+0x34/0x54 [<ffffffd5d1864524>] do_mem_abort+0x50/0xa8 [<ffffffd5d2a297dc>] el1_abort+0x3c/0x64 [<ffffffd5d2a29718>] el1h_64_sync_handler+0x44/0xcc [<ffffffd5d181133c>] el1h_64_sync+0x80/0x88 [<ffffffd5d255c1dc>] ufshcd_add_command_trace+0x23c/0x320 [<ffffffd5d255bad8>] ufshcd_compl_one_cqe+0xa4/0x404 [<ffffffd5d2572968>] ufshcd_mcq_poll_cqe_lock+0xac/0x104 [<ffffffd5d11c7460>] ufs_mtk_mcq_intr+0x54/0x74 [ufs_mediatek_mod] [<ffffffd5d19ab92c>] __handle_irq_event_percpu+0xc8/0x348 [<ffffffd5d19abca8>] handle_irq_event+0x3c/0xa8 [<ffffffd5d19b1f0c>] handle_fasteoi_irq+0xf8/0x294 [<ffffffd5d19aa778>] generic_handle_domain_irq+0x54/0x80 [<ffffffd5d18102bc>] gic_handle_irq+0x1d4/0x330 [<ffffffd5d1838210>] call_on_irq_stack+0x44/0x68 [<ffffffd5d183af30>] do_interrupt_handler+0x78/0xd8 [<ffffffd5d2a29c00>] el1_interrupt+0x48/0xa8 [<ffffffd5d2a29ba8>] el1h_64_irq_handler+0x14/0x24 [<ffffffd5d18113c4>] el1h_64_irq+0x80/0x88 [<ffffffd5d2527fb4>] arch_local_irq_enable+0x4/0x1c [<ffffffd5d25282e4>] cpuidle_enter+0x34/0x54 [<ffffffd5d195a678>] do_idle+0x1dc/0x2f8 [<ffffffd5d195a7c4>] cpu_startup_entry+0x30/0x3c [<ffffffd5d18155c4>] secondary_start_kernel+0x134/0x1ac [<ffffffd5d18640bc>] __secondary_switched+0xc4/0xcc
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: 0.16%
- Percentil entre todas las CVEs puntuadas: 5
- 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-476
Referencias
- https://git.kernel.org/stable/c/0614f5618c24fbc3d555efade22887b102ad7ad6
- https://git.kernel.org/stable/c/30df81f2228d65bddf492db3929d9fcaffd38fc5
- https://git.kernel.org/stable/c/93b9e7ee9e93629db80bbc9dab8a874215b89ccf
- https://git.kernel.org/stable/c/be730f9ee92ae08f2bc4b336967bcfd8183c06fe
- https://git.kernel.org/stable/c/f4f590c6c9df7453bbda2ef9170b1b09e42a124c
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-43471",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5.5,
"attackVector": "LOCAL",
"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"
},
"impactScore": 3.6,
"exploitabilityScore": 1.8
}
]
},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
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],
"programFiles": [
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"defaultStatus": "unaffected"
},
{
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},
{
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"version": "6.18.19",
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"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.9",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/ufs/core/ufshcd.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-05-08T15:17:00.193",
"references": [
{
"url": "https://git.kernel.org/stable/c/0614f5618c24fbc3d555efade22887b102ad7ad6",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/30df81f2228d65bddf492db3929d9fcaffd38fc5",
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{
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"tags": [
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-476"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: ufs: core: Fix possible NULL pointer dereference in ufshcd_add_command_trace()\n\nThe kernel log indicates a crash in ufshcd_add_command_trace, due to a NULL\npointer dereference when accessing hwq->id. This can happen if\nufshcd_mcq_req_to_hwq() returns NULL.\n\nThis patch adds a NULL check for hwq before accessing its id field to\nprevent a kernel crash.\n\nKernel log excerpt:\n[<ffffffd5d192dc4c>] notify_die+0x4c/0x8c\n[<ffffffd5d1814e58>] __die+0x60/0xb0\n[<ffffffd5d1814d64>] die+0x4c/0xe0\n[<ffffffd5d181575c>] die_kernel_fault+0x74/0x88\n[<ffffffd5d1864db4>] __do_kernel_fault+0x314/0x318\n[<ffffffd5d2a3cdf8>] do_page_fault+0xa4/0x5f8\n[<ffffffd5d2a3cd34>] do_translation_fault+0x34/0x54\n[<ffffffd5d1864524>] do_mem_abort+0x50/0xa8\n[<ffffffd5d2a297dc>] el1_abort+0x3c/0x64\n[<ffffffd5d2a29718>] el1h_64_sync_handler+0x44/0xcc\n[<ffffffd5d181133c>] el1h_64_sync+0x80/0x88\n[<ffffffd5d255c1dc>] ufshcd_add_command_trace+0x23c/0x320\n[<ffffffd5d255bad8>] ufshcd_compl_one_cqe+0xa4/0x404\n[<ffffffd5d2572968>] ufshcd_mcq_poll_cqe_lock+0xac/0x104\n[<ffffffd5d11c7460>] ufs_mtk_mcq_intr+0x54/0x74 [ufs_mediatek_mod]\n[<ffffffd5d19ab92c>] __handle_irq_event_percpu+0xc8/0x348\n[<ffffffd5d19abca8>] handle_irq_event+0x3c/0xa8\n[<ffffffd5d19b1f0c>] handle_fasteoi_irq+0xf8/0x294\n[<ffffffd5d19aa778>] generic_handle_domain_irq+0x54/0x80\n[<ffffffd5d18102bc>] gic_handle_irq+0x1d4/0x330\n[<ffffffd5d1838210>] call_on_irq_stack+0x44/0x68\n[<ffffffd5d183af30>] do_interrupt_handler+0x78/0xd8\n[<ffffffd5d2a29c00>] el1_interrupt+0x48/0xa8\n[<ffffffd5d2a29ba8>] el1h_64_irq_handler+0x14/0x24\n[<ffffffd5d18113c4>] el1h_64_irq+0x80/0x88\n[<ffffffd5d2527fb4>] arch_local_irq_enable+0x4/0x1c\n[<ffffffd5d25282e4>] cpuidle_enter+0x34/0x54\n[<ffffffd5d195a678>] do_idle+0x1dc/0x2f8\n[<ffffffd5d195a7c4>] cpu_startup_entry+0x30/0x3c\n[<ffffffd5d18155c4>] secondary_start_kernel+0x134/0x1ac\n[<ffffffd5d18640bc>] __secondary_switched+0xc4/0xcc"
}
],
"lastModified": "2026-06-17T10:49:39.930",
"configurations": [
{
"nodes": [
{
"negate": false,
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}