CVE-2023-52439

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Source
https://cve.org/CVERecord?id=CVE-2023-52439
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-52439.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2023-52439
Downstream
Related
Published
2024-02-20T18:34:49.323Z
Modified
2026-04-11T12:46:30.075503Z
Summary
uio: Fix use-after-free in uio_open
Details

In the Linux kernel, the following vulnerability has been resolved:

uio: Fix use-after-free in uio_open

core-1 core-2

uiounregisterdevice uioopen idev = idrfind() deviceunregister(&idev->dev) putdevice(&idev->dev) uiodevicerelease getdevice(&idev->dev) kfree(idev) uiofreeminor(minor) uiorelease put_device(&idev->dev)

kfree(idev)

In the core-1 uiounregisterdevice(), the deviceunregister will kfree idev when the idev->dev kobject ref is 1. But after core-1 deviceunregister, putdevice and before doing kfree, the core-2 may getdevice. Then: 1. After core-1 kfree idev, the core-2 will do use-after-free for idev. 2. When core-2 do uiorelease and putdevice, the idev will be double freed.

To address this issue, we can get idev atomic & inc idev reference with minor_lock.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52439.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
57c5f4df0a5a0ee83df799991251e2ee93a5e4e9
Fixed
3174e0f7de1ba392dc191625da83df02d695b60c
Fixed
e93da893d52d82d57fc0db2ca566024e0f26ff50
Fixed
5e0be1229ae199ebb90b33102f74a0f22d152570
Fixed
5cf604ee538ed0c467abe3b4cda5308a6398f0f7
Fixed
17a8519cb359c3b483fb5c7367efa9a8a508bdea
Fixed
35f102607054faafe78d2a6994b18d5d9d6e92ad
Fixed
913205930da6213305616ac539447702eaa85e41
Fixed
0c9ae0b8605078eafc3bea053cc78791e97ba2e2
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
13af019c87f2d90e663742cb1a819834048842ae

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-52439.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
4.18.0
Fixed
4.19.306
Type
ECOSYSTEM
Events
Introduced
4.20.0
Fixed
5.4.268
Type
ECOSYSTEM
Events
Introduced
5.5.0
Fixed
5.10.209
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.148
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.74
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.13
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.7.1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-52439.json"