CVE-2025-38580 (GCVE-0-2025-38580)
Vulnerability from cvelistv5
Published
2025-08-19 17:03
Modified
2025-09-29 05:54
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: fix inode use after free in ext4_end_io_rsv_work() In ext4_io_end_defer_completion(), check if io_end->list_vec is empty to avoid adding an io_end that requires no conversion to the i_rsv_conversion_list, which in turn prevents starting an unnecessary worker. An ext4_emergency_state() check is also added to avoid attempting to abort the journal in an emergency state. Additionally, ext4_put_io_end_defer() is refactored to call ext4_io_end_defer_completion() directly instead of being open-coded. This also prevents starting an unnecessary worker when EXT4_IO_END_FAILED is set but data_err=abort is not enabled. This ensures that the check in ext4_put_io_end_defer() is consistent with the check in ext4_end_bio(). Otherwise, we might add an io_end to the i_rsv_conversion_list and then call ext4_finish_bio(), after which the inode could be freed before ext4_end_io_rsv_work() is called, triggering a use-after-free issue.
References
Impacted products
Vendor Product Version
Linux Linux Version: ce51afb8cc5e1867ea0dfdf5e92ddbe31a1fad5d
Version: ce51afb8cc5e1867ea0dfdf5e92ddbe31a1fad5d
Version: ce51afb8cc5e1867ea0dfdf5e92ddbe31a1fad5d
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{
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ext4/page-io.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix inode use after free in ext4_end_io_rsv_work()\n\nIn ext4_io_end_defer_completion(), check if io_end-\u003elist_vec is empty to\navoid adding an io_end that requires no conversion to the\ni_rsv_conversion_list, which in turn prevents starting an unnecessary\nworker. An ext4_emergency_state() check is also added to avoid attempting\nto abort the journal in an emergency state.\n\nAdditionally, ext4_put_io_end_defer() is refactored to call\next4_io_end_defer_completion() directly instead of being open-coded.\nThis also prevents starting an unnecessary worker when EXT4_IO_END_FAILED\nis set but data_err=abort is not enabled.\n\nThis ensures that the check in ext4_put_io_end_defer() is consistent with\nthe check in ext4_end_bio(). Otherwise, we might add an io_end to the\ni_rsv_conversion_list and then call ext4_finish_bio(), after which the\ninode could be freed before ext4_end_io_rsv_work() is called, triggering\na use-after-free issue."
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        "dateUpdated": "2025-09-29T05:54:11.419Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38580",
    "datePublished": "2025-08-19T17:03:03.018Z",
    "dateReserved": "2025-04-16T04:51:24.026Z",
    "dateUpdated": "2025-09-29T05:54:11.419Z",
    "state": "PUBLISHED"
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  }
}


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