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CVE-2023-52445

Status Candidate

Overview

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.

Related Files

Ubuntu Security Notice USN-6739-1
Posted Apr 19, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6739-1 - It was discovered that a race condition existed in the instruction emulator of the Linux kernel on Arm 64-bit systems. A local attacker could use this to cause a denial of service. Wei Chen discovered that a race condition existed in the TIPC protocol implementation in the Linux kernel, leading to a null pointer dereference vulnerability. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel, local, protocol
systems | linux, ubuntu
advisories | CVE-2019-25162, CVE-2021-46990, CVE-2022-20422, CVE-2023-1382, CVE-2023-1998, CVE-2023-24023, CVE-2023-51043, CVE-2023-51779, CVE-2023-52445, CVE-2023-52600, CVE-2023-52603, CVE-2024-23851
SHA-256 | 5f4dadac1f0ffbad1948bc44ea21d9526e86681e856c3a3cb7fb406e90965bf4
Ubuntu Security Notice USN-6726-3
Posted Apr 17, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6726-3 - Pratyush Yadav discovered that the Xen network backend implementation in the Linux kernel did not properly handle zero length data request, leading to a null pointer dereference vulnerability. An attacker in a guest VM could possibly use this to cause a denial of service. It was discovered that the IPv6 implementation of the Linux kernel did not properly manage route cache memory usage. A remote attacker could use this to cause a denial of service.

tags | advisory, remote, denial of service, kernel
systems | linux, ubuntu
advisories | CVE-2023-46838, CVE-2023-52340, CVE-2023-52436, CVE-2023-52438, CVE-2023-52439, CVE-2023-52444, CVE-2023-52445, CVE-2023-52449, CVE-2023-52451, CVE-2023-52454, CVE-2023-52470, CVE-2023-52612, CVE-2024-0607, CVE-2024-23851
SHA-256 | fbdef91004d190c96cf4e043eaae82ae1153ee17c38e14e93c908daa2a909e66
Ubuntu Security Notice USN-6726-2
Posted Apr 17, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6726-2 - Pratyush Yadav discovered that the Xen network backend implementation in the Linux kernel did not properly handle zero length data request, leading to a null pointer dereference vulnerability. An attacker in a guest VM could possibly use this to cause a denial of service. It was discovered that the IPv6 implementation of the Linux kernel did not properly manage route cache memory usage. A remote attacker could use this to cause a denial of service.

tags | advisory, remote, denial of service, kernel
systems | linux, ubuntu
advisories | CVE-2023-46838, CVE-2023-52340, CVE-2023-52436, CVE-2023-52438, CVE-2023-52439, CVE-2023-52444, CVE-2023-52445, CVE-2023-52449, CVE-2023-52451, CVE-2023-52454, CVE-2023-52470, CVE-2023-52612, CVE-2024-0607, CVE-2024-23851
SHA-256 | 729c2c491401a2ba3cbcc24fc7e792dce6e1d41caac420160758655bfe67ca27
Ubuntu Security Notice USN-6726-1
Posted Apr 9, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6726-1 - Pratyush Yadav discovered that the Xen network backend implementation in the Linux kernel did not properly handle zero length data request, leading to a null pointer dereference vulnerability. An attacker in a guest VM could possibly use this to cause a denial of service. It was discovered that the IPv6 implementation of the Linux kernel did not properly manage route cache memory usage. A remote attacker could use this to cause a denial of service.

tags | advisory, remote, denial of service, kernel
systems | linux, ubuntu
advisories | CVE-2023-46838, CVE-2023-52340, CVE-2023-52436, CVE-2023-52438, CVE-2023-52439, CVE-2023-52444, CVE-2023-52445, CVE-2023-52449, CVE-2023-52451, CVE-2023-52454, CVE-2023-52470, CVE-2023-52612, CVE-2024-0607, CVE-2024-23851
SHA-256 | 9d8567a66a05e4472fe61be7f8a7bdb51155d4ee0ca5cf5cf863b32e3467a029
Ubuntu Security Notice USN-6688-1
Posted Mar 12, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6688-1 - Pratyush Yadav discovered that the Xen network backend implementation in the Linux kernel did not properly handle zero length data request, leading to a null pointer dereference vulnerability. An attacker in a guest VM could possibly use this to cause a denial of service. It was discovered that the Habana's AI Processors driver in the Linux kernel did not properly initialize certain data structures before passing them to user space. A local attacker could use this to expose sensitive information.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-46838, CVE-2023-50431, CVE-2023-52436, CVE-2023-52438, CVE-2023-52439, CVE-2023-52443, CVE-2023-52444, CVE-2023-52445, CVE-2023-52447, CVE-2023-52448, CVE-2023-52449, CVE-2023-52454, CVE-2023-52457, CVE-2023-52462
SHA-256 | 14e46adfe602e3381472cca2694960e60b4f66b2adf1e14c5cefabbd3a423e8c
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