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CVE-2023-52757

Status Candidate

Overview

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential deadlock when releasing mids All release_mid() callers seem to hold a reference of @mid so there is no need to call kref_put(&mid->refcount, __release_mid) under @server->mid_lock spinlock. If they don't, then an use-after-free bug would have occurred anyways. By getting rid of such spinlock also fixes a potential deadlock as shown below CPU 0 CPU 1 ------------------------------------------------------------------ cifs_demultiplex_thread() cifs_debug_data_proc_show() release_mid() spin_lock(&server->mid_lock); spin_lock(&cifs_tcp_ses_lock) spin_lock(&server->mid_lock) __release_mid() smb2_find_smb_tcon() spin_lock(&cifs_tcp_ses_lock) *deadlock*

Related Files

Ubuntu Security Notice USN-7123-1
Posted Nov 20, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 7123-1 - It was discovered that the CIFS network file system implementation in the Linux kernel did not properly validate certain SMB messages, leading to an out-of-bounds read vulnerability. An attacker could use this to cause a denial of service or possibly expose sensitive information. Supraja Sridhara, Benedict Schlüter, Mark Kuhne, Andrin Bertschi, and Shweta Shinde discovered that the Confidential Computing framework in the Linux kernel for x86 platforms did not properly handle 32-bit emulation on TDX and SEV. An attacker with access to the VMM could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, x86, kernel
systems | linux, ubuntu
advisories | CVE-2022-48666, CVE-2023-52757, CVE-2023-52889, CVE-2023-6610, CVE-2024-25744, CVE-2024-26661, CVE-2024-26669, CVE-2024-26800, CVE-2024-38577, CVE-2024-38602, CVE-2024-38611, CVE-2024-40915, CVE-2024-41011, CVE-2024-41012
SHA-256 | 0f33e2b0d9d4e9003aac62a268df3eec34205925efe7c3aefc683aecc1fe44d6
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