CVE-2026-53024
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: greybus: raw: fix use-after-free if write is called after disconnect If a user writes to the chardev after disconnect has been called, the kernel panics with the following trace (with CONFIG_INIT_ON_FREE_DEFAULT_ON=y): BUG: kernel NULL pointer dereference, address: 0000000000000218 ... Call Trace: <TASK> gb_operation_create_common+0x61/0x180 gb_operation_create_flags+0x28/0xa0 gb_operation_sync_timeout+0x6f/0x100 raw_write+0x7b/0xc7 [gb_raw] vfs_write+0xcf/0x420 ? task_mm_cid_work+0x136/0x220 ksys_write+0x63/0xe0 do_syscall_64+0xa4/0x290 entry_SYSCALL_64_after_hwframe+0x77/0x7f Disconnect calls gb_connection_destroy, which ends up freeing the connection object. When gb_operation_sync is called in the write file operations, its gets a freed connection as parameter and the kernel panics. The gb_connection_destroy cannot be moved out of the disconnect function, as the Greybus subsystem expect all connections belonging to a bundle to be destroyed when disconnect returns. To prevent this bug, use a rw lock to synchronize access between write and disconnect. This guarantees that the write function doesn't try to use a disconnected connection.
View original CVE JSON
{
"id": "CVE-2026-53024",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-06-24T17:17:13.760",
"lastModified": "2026-10-30T13:19:08.853",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngreybus: raw: fix use-after-free if write is called after disconnect\n\nIf a user writes to the chardev after disconnect has been called, the\nkernel panics with the following trace (with\nCONFIG_INIT_ON_FREE_DEFAULT_ON=y):\n\n BUG: kernel NULL pointer dereference, address: 0000000000000218\n ...\n Call Trace:\n <TASK>\n gb_operation_create_common+0x61/0x180\n gb_operation_create_flags+0x28/0xa0\n gb_operation_sync_timeout+0x6f/0x100\n raw_write+0x7b/0xc7 [gb_raw]\n vfs_write+0xcf/0x420\n ? task_mm_cid_work+0x136/0x220\n ksys_write+0x63/0xe0\n do_syscall_64+0xa4/0x290\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nDisconnect calls gb_connection_destroy, which ends up freeing the\nconnection object. When gb_operation_sync is called in the write file\noperations, its gets a freed connection as parameter and the kernel\npanics.\n\nThe gb_connection_destroy cannot be moved out of the disconnect\nfunction, as the Greybus subsystem expect all connections belonging to a\nbundle to be destroyed when disconnect returns.\n\nTo prevent this bug, use a rw lock to synchronize access between write\nand disconnect. This guarantees that the write function doesn't try\nto use a disconnected connection."
}
],
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"programFiles": [
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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{
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},
{
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"lessThanOrEqual": "7.0.*",
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},
{
"version": "7.1",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
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}
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}
]
}
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"metrics": {
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"baseScore": 7.8,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
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"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
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"lang": "en",
"value": "CWE-416"
}
]
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