Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2023-52439— uio: Fix use-after-free in uio_open

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于 uio 模块的 uio_open 中存在释放后重用问题。

CVSS 7.8 · High EPSS 0.30% · P21

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9< 3174e0f7de1ba392dc191625da83df02d695b60c affected
57c5f4df0a5a0ee83df799991251e2ee93a5e4e9< e93da893d52d82d57fc0db2ca566024e0f26ff50 affected
57c5f4df0a5a0ee83df799991251e2ee93a5e4e9< 5e0be1229ae199ebb90b33102f74a0f22d152570 affected
57c5f4df0a5a0ee83df799991251e2ee93a5e4e9< 5cf604ee538ed0c467abe3b4cda5308a6398f0f7 affected
57c5f4df0a5a0ee83df799991251e2ee93a5e4e9< 17a8519cb359c3b483fb5c7367efa9a8a508bdea affected
57c5f4df0a5a0ee83df799991251e2ee93a5e4e9< 35f102607054faafe78d2a6994b18d5d9d6e92ad affected
57c5f4df0a5a0ee83df799991251e2ee93a5e4e9< 913205930da6213305616ac539447702eaa85e41 affected
57c5f4df0a5a0ee83df799991251e2ee93a5e4e9< 0c9ae0b8605078eafc3bea053cc78791e97ba2e2 affected
… +12 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2023-52439

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
uio: Fix use-after-free in uio_open
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于 uio 模块的 uio_open 中存在释放后重用问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 ~ 3174e0f7de1ba392dc191625da83df02d695b60c -
Linux Linux 4.18 -

II. Public POCs for CVE-2023-52439

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2023-52439

请登录查看更多情报信息。

Mailing List Discussions for CVE-2023-52439 (2)

Other References for CVE-2023-52439 (8)

Same Patch Batch · Linux · 2024-02-20 · 7 CVEs total

CVE-2023-52434 8.1 HIGH smb: client: fix potential OOBs in smb2_parse_contexts()
CVE-2023-52433 7.8 HIGH netfilter: nft_set_rbtree: skip sync GC for new elements in this transaction
CVE-2024-26581 7.8 HIGH netfilter: nft_set_rbtree: skip end interval element from gc
CVE-2023-52436 7.8 HIGH f2fs: explicitly null-terminate the xattr list
CVE-2023-52438 7.8 HIGH binder: fix use-after-free in shinker's callback
CVE-2023-52435 net: prevent mss overflow in skb_segment()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52439

No comments yet

Leave a comment