CVE-2023-52445: media: pvrusb2: fix use after free on context disconnection
First published: Thu Feb 22 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <4.19.306 | |
| Linux Kernel | >=4.20<5.4.268 | |
| Linux Kernel | >=5.5.0<5.10.209 | |
| Linux Kernel | >=5.11.0<5.15.148 | |
| Linux Kernel | >=5.16.0<6.1.75 | |
| Linux Kernel | >=6.2.0<6.6.14 | |
| Linux Kernel | >=6.7.0<6.7.2 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.10-1 6.12.11-1 |
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Reference Links
- https://git.kernel.org/stable/c/2cf0005d315549b8d2b940ff96a66c2a889aa795
- https://git.kernel.org/stable/c/30773ea47d41773f9611ffb4ebc9bda9d19a9e7e
- https://git.kernel.org/stable/c/3233d8bf7893550045682192cb227af7fa3defeb
- https://git.kernel.org/stable/c/437b5f57732bb4cc32cc9f8895d2010ee9ff521c
- https://git.kernel.org/stable/c/47aa8fcd5e8b5563af4042a00f25ba89bef8f33d
- https://git.kernel.org/stable/c/ded85b0c0edd8f45fec88783d7555a5b982449c1
- https://git.kernel.org/stable/c/ec3634ebe23fc3c44ebc67c6d25917300bc68c08
- https://git.kernel.org/stable/c/ec36c134dd020d28e312c2f1766f85525e747aab
- https://launchpad.net/bugs/cve/CVE-2023-52445
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2267102
- https://access.redhat.com/errata/RHSA-2024:3618
- https://access.redhat.com/errata/RHSA-2024:3627
- https://access.redhat.com/security/cve/CVE-2023-52445
- https://access.redhat.com/errata/RHSA-2024:9315
- https://bugzilla.redhat.com/show_bug.cgi?id=2265654
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-52445
- https://nvd.nist.gov/vuln/detail/CVE-2023-52445
- https://security-tracker.debian.org/tracker/CVE-2023-52445
- https://ubuntu.com/security/CVE-2023-52445
- https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- https://git.kernel.org/linus/ded85b0c0edd8f45fec88783d7555a5b982449c1
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