CVE-2023-54117
In the Linux kernel, the following vulnerability has been resolved:
s390/dcssblk: fix kernel crash with list_add corruption
Commit fb08a1908cb1 ("dax: simplify the dax_device <-> gendisk association") introduced new logic for gendisk association, requiring drivers to explicitly call dax_add_host() and dax_remove_host().
For dcssblk driver, some dax_remove_host() calls were missing, e.g. in device remove path. The commit also broke error handling for out_dax case in device add path, resulting in an extra put_device() w/o the previous get_device() in that case.
This lead to stale xarray entries after device add / remove cycles. In the case when a previously used struct gendisk pointer (xarray index) would be used again, because blk_alloc_disk() happened to return such a pointer, the xa_insert() in dax_add_host() would fail and go to out_dax, doing the extra put_device() in the error path. In combination with an already flawed error handling in dcssblk (device_register() cleanup), which needs to be addressed in a separate patch, this resulted in a missing device_del() / klist_del(), and eventually in the kernel crash with list_add corruption on a subsequent device_add() / klist_add().
Leer descripción completaMostrar menos
Fix this by adding the missing dax_remove_host() calls, and also move the put_device() in the error path to restore the previous logic.
CVSS
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: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- 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)
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{
"id": "CVE-2023-54117",
"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": "fb08a1908cb119a4585611d91461ab6d27756b14",
"lessThan": "6489ec0107860345bc57dcde39e63dfb05ac5c11",
"versionType": "git"
},
{
"status": "affected",
"version": "fb08a1908cb119a4585611d91461ab6d27756b14",
"lessThan": "b7ad75c77349beb4983b9f27108d9b3f33ae1413",
"versionType": "git"
},
{
"status": "affected",
"version": "fb08a1908cb119a4585611d91461ab6d27756b14",
"lessThan": "b5c531a9a7d8e047c90c909f09cef06a9f8e62f4",
"versionType": "git"
},
{
"status": "affected",
"version": "fb08a1908cb119a4585611d91461ab6d27756b14",
"lessThan": "c8f40a0bccefd613748d080147469a4652d6e74c",
"versionType": "git"
}
],
"programFiles": [
"drivers/s390/block/dcssblk.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.53",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.4.16",
"versionType": "semver",
"lessThanOrEqual": "6.4.*"
},
{
"status": "unaffected",
"version": "6.5.3",
"versionType": "semver",
"lessThanOrEqual": "6.5.*"
},
{
"status": "unaffected",
"version": "6.6",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/s390/block/dcssblk.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-12-24T13:16:13.637",
"references": [
{
"url": "https://git.kernel.org/stable/c/6489ec0107860345bc57dcde39e63dfb05ac5c11",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b5c531a9a7d8e047c90c909f09cef06a9f8e62f4",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b7ad75c77349beb4983b9f27108d9b3f33ae1413",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/c8f40a0bccefd613748d080147469a4652d6e74c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/dcssblk: fix kernel crash with list_add corruption\n\nCommit fb08a1908cb1 (\"dax: simplify the dax_device <-> gendisk\nassociation\") introduced new logic for gendisk association, requiring\ndrivers to explicitly call dax_add_host() and dax_remove_host().\n\nFor dcssblk driver, some dax_remove_host() calls were missing, e.g. in\ndevice remove path. The commit also broke error handling for out_dax case\nin device add path, resulting in an extra put_device() w/o the previous\nget_device() in that case.\n\nThis lead to stale xarray entries after device add / remove cycles. In the\ncase when a previously used struct gendisk pointer (xarray index) would be\nused again, because blk_alloc_disk() happened to return such a pointer, the\nxa_insert() in dax_add_host() would fail and go to out_dax, doing the extra\nput_device() in the error path. In combination with an already flawed error\nhandling in dcssblk (device_register() cleanup), which needs to be\naddressed in a separate patch, this resulted in a missing device_del() /\nklist_del(), and eventually in the kernel crash with list_add corruption on\na subsequent device_add() / klist_add().\n\nFix this by adding the missing dax_remove_host() calls, and also move the\nput_device() in the error path to restore the previous logic."
}
],
"lastModified": "2026-06-17T06:46:49.960",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}