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CVE-2023-52445— media: pvrusb2: fix use after free on context disconnection

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，该漏洞源于存在内存释放后重用问题。

AI Predicted 5.5 Difficulty: Easy EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux e5be15c63804e05b5a94197524023702a259e308< ec36c134dd020d28e312c2f1766f85525e747aab affected
e5be15c63804e05b5a94197524023702a259e308< 47aa8fcd5e8b5563af4042a00f25ba89bef8f33d affected
e5be15c63804e05b5a94197524023702a259e308< 3233d8bf7893550045682192cb227af7fa3defeb affected
e5be15c63804e05b5a94197524023702a259e308< ec3634ebe23fc3c44ebc67c6d25917300bc68c08 affected
e5be15c63804e05b5a94197524023702a259e308< 30773ea47d41773f9611ffb4ebc9bda9d19a9e7e affected
e5be15c63804e05b5a94197524023702a259e308< 2cf0005d315549b8d2b940ff96a66c2a889aa795 affected
e5be15c63804e05b5a94197524023702a259e308< 437b5f57732bb4cc32cc9f8895d2010ee9ff521c affected
e5be15c63804e05b5a94197524023702a259e308< ded85b0c0edd8f45fec88783d7555a5b982449c1 affected
… +10 more rows
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I. Basic Information for CVE-2023-52445

Vulnerability Information
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Vulnerability Title
media: pvrusb2: fix use after free on context disconnection
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: media: pvrusb2: fix use after free on context disconnection Upon module load, a kthread is created targeting the pvr2_context_thread_func function, which may call pvr2_context_destroy and thus call kfree() on the context object. However, that might happen before the usb hub_event handler is able to notify the driver. This patch adds a sanity check before the invalid read reported by syzbot, within the context disconnection call stack.
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，该漏洞源于存在内存释放后重用问题。
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 e5be15c63804e05b5a94197524023702a259e308 ~ ec36c134dd020d28e312c2f1766f85525e747aab -
Linux Linux 2.6.26 -

II. Public POCs for CVE-2023-52445

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III. Intelligence Information for CVE-2023-52445

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Mailing List Discussions for CVE-2023-52445 (2)

Other References for CVE-2023-52445 (8)

Same Patch Batch · Linux · 2024-02-22 · 17 CVEs total

CVE-2024-26592 9.8 CRITICAL ksmbd: fix UAF issue in ksmbd_tcp_new_connection()
CVE-2023-52447 7.8 HIGH bpf: Defer the free of inner map when necessary
CVE-2023-52444 7.8 HIGH f2fs: fix to avoid dirent corruption
CVE-2024-26589 7.8 HIGH bpf: Reject variable offset alu on PTR_TO_FLOW_KEYS
CVE-2024-26586 7.8 HIGH mlxsw: spectrum_acl_tcam: Fix stack corruption
CVE-2024-26591 bpf: Fix re-attachment branch in bpf_tracing_prog_attach
CVE-2023-52452 bpf: Fix accesses to uninit stack slots
CVE-2023-52451 powerpc/pseries/memhp: Fix access beyond end of drmem array
CVE-2023-52450 perf/x86/intel/uncore: Fix NULL pointer dereference issue in upi_fill_topology()
CVE-2023-52449 mtd: Fix gluebi NULL pointer dereference caused by ftl notifier
CVE-2023-52448 gfs2: Fix kernel NULL pointer dereference in gfs2_rgrp_dump
CVE-2023-52446 bpf: Fix a race condition between btf_put() and map_free()
CVE-2024-26590 erofs: fix inconsistent per-file compression format
CVE-2024-26588 LoongArch: BPF: Prevent out-of-bounds memory access
CVE-2024-26587 net: netdevsim: don't try to destroy PHC on VFs
CVE-2023-52443 apparmor: avoid crash when parsed profile name is empty

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52445

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