CVE-2026-53272
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: erofs: fix use-after-free on sbi->sync_decompress z_erofs_decompress_kickoff() can race with filesystem unmount, causing a use-after-free on sbi->sync_decompress. When I/O completes, z_erofs_endio() calls z_erofs_decompress_kickoff() to queue z_erofs_decompressqueue_work() asynchronously. Then, after all folios are unlocked, unmount workflow can proceed and sbi will be freed before accessing to sbi->sync_decompress. Thread (unmount) I/O completion kworker queue_work z_erofs_decompressqueue_work (all folios are unlocked) cleanup_mnt .. erofs_kill_sb erofs_sb_free kfree(sbi) access sbi->sync_decompress // UAF!!
Severity
HIGH
CVSS score
7.8
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-06-25 09:16:45.353000
Last modified
2026-10-30 13:19:15.543000
View original CVE JSON
{
"id": "CVE-2026-53272",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-06-25T09:16:45.353",
"lastModified": "2026-10-30T13:19:15.543",
"vulnStatus": "Modified",
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix use-after-free on sbi->sync_decompress\n\nz_erofs_decompress_kickoff() can race with filesystem unmount, causing\na use-after-free on sbi->sync_decompress.\n\nWhen I/O completes, z_erofs_endio() calls z_erofs_decompress_kickoff()\nto queue z_erofs_decompressqueue_work() asynchronously. Then, after all\nfolios are unlocked, unmount workflow can proceed and sbi will be freed\nbefore accessing to sbi->sync_decompress.\n\nThread (unmount) I/O completion kworker\n queue_work\n z_erofs_decompressqueue_work\n (all folios are unlocked)\ncleanup_mnt\n ..\n erofs_kill_sb\n erofs_sb_free\n kfree(sbi)\n access sbi->sync_decompress // UAF!!"
}
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"scope": "UNCHANGED",
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"type": "Primary",
"description": [
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