7.8

CVE-2023-52445

media: pvrusb2: fix use after free on context disconnection

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version < 4.19.306
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.268
Linux ≫ Linux Kernel Version >= 5.5.0 < 5.10.209
Linux ≫ Linux Kernel Version >= 5.11.0 < 5.15.148
Linux ≫ Linux Kernel Version >= 5.16.0 < 6.1.75
Linux ≫ Linux Kernel Version >= 6.2.0 < 6.6.14
Linux ≫ Linux Kernel Version >= 6.7.0 < 6.7.2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.25% 0.155
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html
https://git.kernel.org/stable/c/2cf0005d315549b8d2b940ff96a66c2a889aa795
Patch
https://git.kernel.org/stable/c/30773ea47d41773f9611ffb4ebc9bda9d19a9e7e
Patch
https://git.kernel.org/stable/c/3233d8bf7893550045682192cb227af7fa3defeb
Patch
https://git.kernel.org/stable/c/437b5f57732bb4cc32cc9f8895d2010ee9ff521c
Patch
https://git.kernel.org/stable/c/47aa8fcd5e8b5563af4042a00f25ba89bef8f33d
Patch
https://git.kernel.org/stable/c/ded85b0c0edd8f45fec88783d7555a5b982449c1
Patch
https://git.kernel.org/stable/c/ec3634ebe23fc3c44ebc67c6d25917300bc68c08
Patch
https://git.kernel.org/stable/c/ec36c134dd020d28e312c2f1766f85525e747aab
Patch