CVE-2024-39496 (GCVE-0-2024-39496)
Vulnerability from cvelistv5
Published
2024-07-12 12:20
Modified
2026-08-05 11:33
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: zoned: fix use-after-free due to race with dev replace While loading a zone's info during creation of a block group, we can race with a device replace operation and then trigger a use-after-free on the device that was just replaced (source device of the replace operation). This happens because at btrfs_load_zone_info() we extract a device from the chunk map into a local variable and then use the device while not under the protection of the device replace rwsem. So if there's a device replace operation happening when we extract the device and that device is the source of the replace operation, we will trigger a use-after-free if before we finish using the device the replace operation finishes and frees the device. Fix this by enlarging the critical section under the protection of the device replace rwsem so that all uses of the device are done inside the critical section.
References
Impacted products
Vendor Product Version
Linux Linux Version: 5b316468983dfa9473ff0f1c42e4e30b4c267141
Version: 5b316468983dfa9473ff0f1c42e4e30b4c267141
Version: 5b316468983dfa9473ff0f1c42e4e30b4c267141
Version: 5b316468983dfa9473ff0f1c42e4e30b4c267141
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