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

AI Predicted 7.8 Difficulty: Moderate EPSS 0.30% · P22

Affected Version Matrix 20

VendorProductVersion RangeStatus
LinuxLinux57c5f4df0a5a0ee83df799991251e2ee93a5e4e9< 3174e0f7de1ba392dc191625da83df02d695b60caffected
57c5f4df0a5a0ee83df799991251e2ee93a5e4e9< e93da893d52d82d57fc0db2ca566024e0f26ff50affected
57c5f4df0a5a0ee83df799991251e2ee93a5e4e9< 5e0be1229ae199ebb90b33102f74a0f22d152570affected
57c5f4df0a5a0ee83df799991251e2ee93a5e4e9< 5cf604ee538ed0c467abe3b4cda5308a6398f0f7affected
57c5f4df0a5a0ee83df799991251e2ee93a5e4e9< 17a8519cb359c3b483fb5c7367efa9a8a508bdeaaffected
57c5f4df0a5a0ee83df799991251e2ee93a5e4e9< 35f102607054faafe78d2a6994b18d5d9d6e92adaffected
57c5f4df0a5a0ee83df799991251e2ee93a5e4e9< 913205930da6213305616ac539447702eaa85e41affected
57c5f4df0a5a0ee83df799991251e2ee93a5e4e9< 0c9ae0b8605078eafc3bea053cc78791e97ba2e2affected
… +12 more rows
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I. Basic Information for CVE-2023-52439

Vulnerability Information
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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
N/A
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 57c5f4df0a5a0ee83df799991251e2ee93a5e4e9 ~ 3174e0f7de1ba392dc191625da83df02d695b60c -
LinuxLinux 4.18 -

II. Public POCs for CVE-2023-52439

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III. Intelligence Information for CVE-2023-52439

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52439

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