CVE - CVE-2024-39496

CVE-ID
CVE-2024-39496	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0090d6e1b210551e63cf43958dc7a1ec942cdde9 URL:https://git.kernel.org/stable/c/0090d6e1b210551e63cf43958dc7a1ec942cdde9 MISC:https://git.kernel.org/stable/c/092571ef9a812566c8f2c9038d9c2a64c49788d6 URL:https://git.kernel.org/stable/c/092571ef9a812566c8f2c9038d9c2a64c49788d6 MISC:https://git.kernel.org/stable/c/17765964703b88d8befd899f8501150bb7e07e43 URL:https://git.kernel.org/stable/c/17765964703b88d8befd899f8501150bb7e07e43 MISC:https://git.kernel.org/stable/c/a0cc006f4214b87e70983c692e05bb36c59b5752 URL:https://git.kernel.org/stable/c/a0cc006f4214b87e70983c692e05bb36c59b5752
Assigning CNA
kernel.org
Date Record Created
20240625	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240625)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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