CVE-2023-54020
Estado: AplazadaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
dmaengine: sf-pdma: pdma_desc memory leak fix
Commit b2cc5c465c2c ("dmaengine: sf-pdma: Add multithread support for a DMA channel") changed sf_pdma_prep_dma_memcpy() to unconditionally allocate a new sf_pdma_desc each time it is called.
The driver previously recycled descs, by checking the in_use flag, only allocating additional descs if the existing one was in use. This logic was removed in commit b2cc5c465c2c ("dmaengine: sf-pdma: Add multithread support for a DMA channel"), but sf_pdma_free_desc() was not changed to handle the new behaviour.
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As a result, each time sf_pdma_prep_dma_memcpy() is called, the previous descriptor is leaked, over time leading to memory starvation:
Add the missing kfree() to sf_pdma_free_desc(), and remove the redundant in_use flag.
Detalles técnicos trazas, registros y código del informe original
unreferenced object 0xffffffe008447300 (size 192):
comm "irq/39-mchp_dsc", pid 343, jiffies 4294906910 (age 981.200s)
hex dump (first 32 bytes):
00 00 00 ff 00 00 00 00 b8 c1 00 00 00 00 00 00 ................
00 00 70 08 10 00 00 00 00 00 00 c0 00 00 00 00 ..p.............
backtrace:
[<00000000064a04f4>] kmemleak_alloc+0x1e/0x28
[<00000000018927a7>] kmem_cache_alloc+0x11e/0x178
[<000000002aea8d16>] sf_pdma_prep_dma_memcpy+0x40/0x112CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
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)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2023-54020",
"cveTags": [],
"metrics": {},
"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": "5ab2782c944e324008ef5d658f2494a9f0e3c5ac",
"lessThan": "ad222c9af25e3f074c180e389b3477dce42afc4f",
"versionType": "git"
},
{
"status": "affected",
"version": "b2cc5c465c2cb8ab697c3fd6583c614e3f6cfbcc",
"lessThan": "03fece43fa109beba7cc9948c02f5e2d1205d607",
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{
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{
"status": "affected",
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{
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{
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"version": "4c7350b1dd8a192af844de32fc99b9e34c876fda",
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{
"status": "affected",
"version": "a93b3f1e11971a91b6441b6d47488f4492cc113f",
"versionType": "git"
},
{
"status": "affected",
"version": "5.15.61",
"lessThan": "5.15.99",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.10.137",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.18.18",
"lessThan": "5.19",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.19.2",
"lessThan": "5.20",
"versionType": "semver"
}
],
"programFiles": [
"drivers/dma/sf-pdma/sf-pdma.c",
"drivers/dma/sf-pdma/sf-pdma.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.99",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.16",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.2.3",
"versionType": "semver",
"lessThanOrEqual": "6.2.*"
},
{
"status": "unaffected",
"version": "6.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/dma/sf-pdma/sf-pdma.c",
"drivers/dma/sf-pdma/sf-pdma.h"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-12-24T11:15:55.003",
"references": [
{
"url": "https://git.kernel.org/stable/c/03fece43fa109beba7cc9948c02f5e2d1205d607",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/8bd5040bd43f2b5ba3c898b09a3197a0c7ace126",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ad222c9af25e3f074c180e389b3477dce42afc4f",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b02e07015a5ac7bbc029da931ae17914b8ae0339",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: sf-pdma: pdma_desc memory leak fix\n\nCommit b2cc5c465c2c (\"dmaengine: sf-pdma: Add multithread support for a\nDMA channel\") changed sf_pdma_prep_dma_memcpy() to unconditionally\nallocate a new sf_pdma_desc each time it is called.\n\nThe driver previously recycled descs, by checking the in_use flag, only\nallocating additional descs if the existing one was in use. This logic\nwas removed in commit b2cc5c465c2c (\"dmaengine: sf-pdma: Add multithread\nsupport for a DMA channel\"), but sf_pdma_free_desc() was not changed to\nhandle the new behaviour.\n\nAs a result, each time sf_pdma_prep_dma_memcpy() is called, the previous\ndescriptor is leaked, over time leading to memory starvation:\n\n unreferenced object 0xffffffe008447300 (size 192):\n comm \"irq/39-mchp_dsc\", pid 343, jiffies 4294906910 (age 981.200s)\n hex dump (first 32 bytes):\n 00 00 00 ff 00 00 00 00 b8 c1 00 00 00 00 00 00 ................\n 00 00 70 08 10 00 00 00 00 00 00 c0 00 00 00 00 ..p.............\n backtrace:\n [<00000000064a04f4>] kmemleak_alloc+0x1e/0x28\n [<00000000018927a7>] kmem_cache_alloc+0x11e/0x178\n [<000000002aea8d16>] sf_pdma_prep_dma_memcpy+0x40/0x112\n\nAdd the missing kfree() to sf_pdma_free_desc(), and remove the redundant\nin_use flag."
}
],
"lastModified": "2026-06-17T06:46:33.090",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}