CVE-2023-52439

Advisory lineage Upstream: 0 Downstream: 32
Modified
Published: 20 Feb 2024, 18:34
Last modified:23 May 2026, 15:25

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

20 Feb 2024, 18:34
Published
Vulnerability first disclosed
23 May 2026, 15:25
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: uio: Fix use-after-free in uio_open core-1 core-2 ------------------------------------------------------- uio_unregister_device uio_open idev = idr_find() device_unregister(&idev->dev) put_device(&idev->dev) uio_device_release get_device(&idev->dev) kfree(idev) uio_free_minor(minor) uio_release put_device(&idev->dev) kfree(idev) ------------------------------------------------------- In the core-1 uio_unregister_device(), the device_unregister will kfree idev when the idev->dev kobject ref is 1. But after core-1 device_unregister, put_device and before doing kfree, the core-2 may get_device. Then: 1. After core-1 kfree idev, the core-2 will do use-after-free for idev. 2. When core-2 do uio_release and put_device, the idev will be double freed. To address this issue, we can get idev atomic & inc idev reference with minor_lock.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 2%

Techniques & Countermeasures

  • CWE-415•Double Free

    The product calls free() twice on the same memory address.

Affected Systems

  • linux•linux

    ≥ 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9, < 3174e0f7de1ba392dc191625da83df02d695b60c | ≥ 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9, < e93da893d52d82d57fc0db2ca566024e0f26ff50 | ≥ 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9, < 5e0be1229ae199ebb90b33102f74a0f22d152570 | ≥ 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9, < 5cf604ee538ed0c467abe3b4cda5308a6398f0f7 | ≥ 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9, < 17a8519cb359c3b483fb5c7367efa9a8a508bdea | ≥ 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9, < 35f102607054faafe78d2a6994b18d5d9d6e92ad | ≥ 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9, < 913205930da6213305616ac539447702eaa85e41 | ≥ 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9, < 0c9ae0b8605078eafc3bea053cc78791e97ba2e2 | 13af019c87f2d90e663742cb1a819834048842ae | ≥ 4.14.100, < 4.15 | 4.18

  • linux•linux_kernel

    > 4.18.0, < 4.19.306 | ≥ 4.20.0, < 5.4.268 | ≥ 5.5.0, < 5.10.209 | ≥ 5.11.0, < 5.15.148 | ≥ 5.16.0, < 6.1.74 | ≥ 6.2.0, < 6.6.13 | ≥ 6.7.0, < 6.7.1 | 4.1.8 | 4.18:rc5 | 4.18:rc6 | 4.18:rc7 | 4.18:rc8

References (11)