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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2024-39496 Detail

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.


Metrics

 
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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/0090d6e1b210551e63cf43958dc7a1ec942cdde9 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/092571ef9a812566c8f2c9038d9c2a64c49788d6 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/17765964703b88d8befd899f8501150bb7e07e43 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/a0cc006f4214b87e70983c692e05bb36c59b5752 CVE, kernel.org Patch 
https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html CVE Mailing List  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-416 Use After Free cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2024-39496
NVD Published Date:
07/12/2024
NVD Last Modified:
01/06/2026
Source:
kernel.org