CVE-2023-52445
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.24% probability · 16th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/2cf0005d315549b8d2b940ff96a66c2a889aa795Patch
- https://git.kernel.org/stable/c/30773ea47d41773f9611ffb4ebc9bda9d19a9e7ePatch
- https://git.kernel.org/stable/c/3233d8bf7893550045682192cb227af7fa3defebPatch
- https://git.kernel.org/stable/c/437b5f57732bb4cc32cc9f8895d2010ee9ff521cPatch
- https://git.kernel.org/stable/c/47aa8fcd5e8b5563af4042a00f25ba89bef8f33dPatch
- https://git.kernel.org/stable/c/ded85b0c0edd8f45fec88783d7555a5b982449c1Patch
- https://git.kernel.org/stable/c/ec3634ebe23fc3c44ebc67c6d25917300bc68c08Patch
- https://git.kernel.org/stable/c/ec36c134dd020d28e312c2f1766f85525e747aabPatch
- https://git.kernel.org/stable/c/2cf0005d315549b8d2b940ff96a66c2a889aa795Patch
- https://git.kernel.org/stable/c/30773ea47d41773f9611ffb4ebc9bda9d19a9e7ePatch
- https://git.kernel.org/stable/c/3233d8bf7893550045682192cb227af7fa3defebPatch
- https://git.kernel.org/stable/c/437b5f57732bb4cc32cc9f8895d2010ee9ff521cPatch
- https://git.kernel.org/stable/c/47aa8fcd5e8b5563af4042a00f25ba89bef8f33dPatch
- https://git.kernel.org/stable/c/ded85b0c0edd8f45fec88783d7555a5b982449c1Patch
- https://git.kernel.org/stable/c/ec3634ebe23fc3c44ebc67c6d25917300bc68c08Patch
- https://git.kernel.org/stable/c/ec36c134dd020d28e312c2f1766f85525e747aabPatch
- https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.