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CVE-2023-32254

Status Candidate

Overview

A flaw was found in the Linux kernel's ksmbd, a high-performance in-kernel SMB server. The specific flaw exists within the processing of SMB2_TREE_DISCONNECT commands. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to execute code in the context of the kernel.

Related Files

Ubuntu Security Notice USN-6725-2
Posted Apr 17, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6725-2 - Chih-Yen Chang discovered that the KSMBD implementation in the Linux kernel did not properly validate certain data structure fields when parsing lease contexts, leading to an out-of-bounds read vulnerability. A remote attacker could use this to cause a denial of service or possibly expose sensitive information. Quentin Minster discovered that a race condition existed in the KSMBD implementation in the Linux kernel, leading to a use-after-free vulnerability. A remote attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, remote, denial of service, arbitrary, kernel
systems | linux, ubuntu
advisories | CVE-2023-1194, CVE-2023-32254, CVE-2023-32258, CVE-2023-38427, CVE-2023-38430, CVE-2023-38431, CVE-2023-3867, CVE-2023-46838, CVE-2023-52340, CVE-2023-52436, CVE-2023-52438, CVE-2023-52439, CVE-2023-52442, CVE-2023-52444
SHA-256 | 6d7cd6326721629b499ff1a4ed3916c1134b9cf7a03933ebb2aad8ffbd18a71d
Ubuntu Security Notice USN-6725-1
Posted Apr 9, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6725-1 - Chih-Yen Chang discovered that the KSMBD implementation in the Linux kernel did not properly validate certain data structure fields when parsing lease contexts, leading to an out-of-bounds read vulnerability. A remote attacker could use this to cause a denial of service or possibly expose sensitive information. Quentin Minster discovered that a race condition existed in the KSMBD implementation in the Linux kernel, leading to a use-after-free vulnerability. A remote attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, remote, denial of service, arbitrary, kernel
systems | linux, ubuntu
advisories | CVE-2023-1194, CVE-2023-32254, CVE-2023-32258, CVE-2023-38427, CVE-2023-38430, CVE-2023-38431, CVE-2023-3867, CVE-2023-46838, CVE-2023-52340, CVE-2023-52436, CVE-2023-52438, CVE-2023-52439, CVE-2023-52442, CVE-2023-52444
SHA-256 | 8d6d30178b2854c30f04f5326a65af3d2a2ce39d0ff00d49cba1cfec2df9734b
Ubuntu Security Notice USN-6283-1
Posted Aug 14, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6283-1 - Ruihan Li discovered that the bluetooth subsystem in the Linux kernel did not properly perform permissions checks when handling HCI sockets. A physically proximate attacker could use this to cause a denial of service. Zheng Zhang discovered that the device-mapper implementation in the Linux kernel did not properly handle locking during table_clear operations. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-2002, CVE-2023-2269, CVE-2023-3141, CVE-2023-32248, CVE-2023-32254, CVE-2023-3268, CVE-2023-3312, CVE-2023-3317, CVE-2023-35823, CVE-2023-35824, CVE-2023-35826, CVE-2023-35828, CVE-2023-35829
SHA-256 | d89ea852ace9ebfc7bd58b09a638e52edb508a4626f5a1fe5c5fc2bf4bbdc318
Debian Security Advisory 5448-1
Posted Jul 6, 2023
Authored by Debian | Site debian.org

Debian Linux Security Advisory 5448-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, debian
advisories | CVE-2023-2124, CVE-2023-2156, CVE-2023-2269, CVE-2023-3090, CVE-2023-31084, CVE-2023-3212, CVE-2023-32250, CVE-2023-32254, CVE-2023-3268, CVE-2023-3269, CVE-2023-3390, CVE-2023-35788
SHA-256 | 69b555bc6896ae45b61015f0f97296207dfc3d9bdcac414ad415646ffe0f0645
Ubuntu Security Notice USN-6173-1
Posted Jun 19, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6173-1 - Gwangun Jung discovered that the Quick Fair Queueing scheduler implementation in the Linux kernel contained an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux kernel did not properly perform data buffer size validation in some situations. A physically proximate attacker could use this to craft a malicious USB device that when inserted, could cause a denial of service or possibly expose sensitive information.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-1380, CVE-2023-2002, CVE-2023-2156, CVE-2023-2269, CVE-2023-31436, CVE-2023-32250, CVE-2023-32254
SHA-256 | ccc8ff95186bd726c8eb36757aaf6c8e4629e08f7a67c77b1f9fe8399317af8c
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