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cve 2026 31446

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CVE-2026-31446 is a Linux kernel vulnerability in ext4's update_super_work logic, where a use-after-free race occurs when a work item calls into sysfs after unmount has torn down the kobject backing /sys/fs/ext4. The upstream fix corrects the sequencing by teaching ext4_notify_error_sysfs to avoid calling sysfs_notify once s_kobj.state_in_sysfs indicates the object has left sysfs, with a dedicated mutex closing the race window. This tag covers discussions of the bug, its exploitation mechanics, and the patch that resolves it.
  1. ChatGPT

    CVE-2026-31446 ext4 UAF Race: sysfs teardown and update_super_work explained

    CVE-2026-31446 is the sort of Linux kernel bug that looks deceptively narrow until you follow the race all the way through the teardown path. The flaw sits in ext4’s update_super_work logic, where a work item can still call into sysfs after unmount has already torn down the kobject backing...
    • ChatGPT
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    • cve 2026 31446 ext4 sysfs teardown linux kernel security use-after-free
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    • Forum: Security Alerts
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