CVE-2025-68324
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: scsi: imm: Fix use-after-free bug caused by unfinished delayed work The delayed work item 'imm_tq' is initialized in imm_attach() and scheduled via imm_queuecommand() for processing SCSI commands. When the IMM parallel port SCSI host adapter is detached through imm_detach(), the imm_struct device instance is deallocated. However, the delayed work might still be pending or executing when imm_detach() is called, leading to use-after-free bugs when the work function imm_interrupt() accesses the already freed imm_struct memory. The race condition can occur as follows: CPU 0(detach thread) | CPU 1 | imm_queuecommand() | imm_queuecommand_lck() imm_detach() | schedule_delayed_work() kfree(dev) //FREE | imm_interrupt() | dev = container_of(...) //USE dev-> //USE Add disable_delayed_work_sync() in imm_detach() to guarantee proper cancellation of the delayed work item before imm_struct is deallocated.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Deferred
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-12-18 15:16:06.220000
Last modified
2026-10-30 13:18:20.967000
View original CVE JSON
{
"id": "CVE-2025-68324",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-12-18T15:16:06.220",
"lastModified": "2026-10-30T13:18:20.967",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: imm: Fix use-after-free bug caused by unfinished delayed work\n\nThe delayed work item 'imm_tq' is initialized in imm_attach() and\nscheduled via imm_queuecommand() for processing SCSI commands. When the\nIMM parallel port SCSI host adapter is detached through imm_detach(),\nthe imm_struct device instance is deallocated.\n\nHowever, the delayed work might still be pending or executing\nwhen imm_detach() is called, leading to use-after-free bugs\nwhen the work function imm_interrupt() accesses the already\nfreed imm_struct memory.\n\nThe race condition can occur as follows:\n\nCPU 0(detach thread) | CPU 1\n | imm_queuecommand()\n | imm_queuecommand_lck()\nimm_detach() | schedule_delayed_work()\n kfree(dev) //FREE | imm_interrupt()\n | dev = container_of(...) //USE\n dev-> //USE\n\nAdd disable_delayed_work_sync() in imm_detach() to guarantee proper\ncancellation of the delayed work item before imm_struct is deallocated."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nscsi: imm: Corrección de error de uso después de liberación causado por trabajo retrasado sin finalizar\n\nEl elemento de trabajo retrasado 'imm_tq' se inicializa en imm_attach() y se programa a través de imm_queuecommand() para procesar comandos SCSI. Cuando el adaptador de host SCSI de puerto paralelo IMM se desvincula mediante imm_detach(), la instancia del dispositivo imm_struct se desasigna.\n\nSin embargo, el trabajo retrasado podría seguir pendiente o ejecutándose cuando se llama a imm_detach(), lo que lleva a errores de uso después de liberación cuando la función de trabajo imm_interrupt() accede a la memoria imm_struct ya liberada.\n\nLa condición de carrera puede ocurrir de la siguiente manera:\n\nCPU 0(detach thread) | CPU 1\n | imm_queuecommand()\n | imm_queuecommand_lck()\nimm_detach() | schedule_delayed_work()\n kfree(dev) //FREE | imm_interrupt()\n | dev = container_of(...) //USE\n dev -> //USE\n\nAñadir disable_delayed_work_sync() en imm_detach() para garantizar la cancelación adecuada del elemento de trabajo retrasado antes de que imm_struct sea desasignado."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/scsi/imm.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "cfd561e8df5f46fc1c9d54885165a60e63831c14",
"versionType": "git",
"status": "affected"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "9a8e53154353580d53f7f86a253927e41294017e",
"versionType": "git",
"status": "affected"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "31ab2aad7a7b7501e904a09bf361e44671f66092",
"versionType": "git",
"status": "affected"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "48dd41fa2d6c6a0c50e714deeba06ffe7f91961b",
"versionType": "git",
"status": "affected"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "9e434426cc23ad5e2aad649327b59aea00294b13",
"versionType": "git",
"status": "affected"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "ab58153ec64fa3fc9aea09ca09dc9322e0b54a7c",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/scsi/imm.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "2.6.12",
"status": "affected"
},
{
"version": "0",
"lessThan": "2.6.12",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.191",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.160",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.63",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.17.13",
"lessThanOrEqual": "6.17.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.2",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.19",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/31ab2aad7a7b7501e904a09bf361e44671f66092",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/48dd41fa2d6c6a0c50e714deeba06ffe7f91961b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9a8e53154353580d53f7f86a253927e41294017e",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9e434426cc23ad5e2aad649327b59aea00294b13",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ab58153ec64fa3fc9aea09ca09dc9322e0b54a7c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/cfd561e8df5f46fc1c9d54885165a60e63831c14",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}