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.
Metrics
Affected Vendors & Products
| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-4008-1 | linux-6.1 security update |
Debian DSA |
DSA-5731-1 | linux security update |
Ubuntu USN |
USN-6999-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-6999-2 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7004-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7005-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7005-2 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7008-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7021-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7021-2 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7021-3 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7021-4 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7021-5 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7029-1 | Linux kernel vulnerabilities |
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Mon, 03 Nov 2025 22:30:00 +0000
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Thu, 15 May 2025 13:15:00 +0000
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| Metrics |
ssvc
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Thu, 12 Sep 2024 20:30:00 +0000
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ssvc
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Wed, 11 Sep 2024 13:30:00 +0000
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ssvc
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Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2025-11-03T21:56:14.179Z
Reserved: 2024-06-25T14:23:23.751Z
Link: CVE-2024-39496
Updated: 2025-11-03T21:56:14.179Z
Status : Modified
Published: 2024-07-12T13:15:12.253
Modified: 2025-11-03T22:17:05.117
Link: CVE-2024-39496
OpenCVE Enrichment
No data.
Debian DLA
Debian DSA
Ubuntu USN