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CVE-2023-34256

Status Candidate

Overview

** DISPUTED ** An issue was discovered in the Linux kernel before 6.3.3. There is an out-of-bounds read in crc16 in lib/crc16.c when called from fs/ext4/super.c because ext4_group_desc_csum does not properly check an offset. NOTE: this is disputed by third parties because the kernel is not intended to defend against attackers with the stated "When modifying the block device while it is mounted by the filesystem" access.

Related Files

Ubuntu Security Notice USN-6701-4
Posted Apr 9, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6701-4 - 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. It was discovered that the NVIDIA Tegra XUSB pad controller driver in the Linux kernel did not properly handle return values in certain error conditions. 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-2023-23000, CVE-2023-3006, CVE-2023-34256, CVE-2023-39197, CVE-2023-4132, CVE-2023-46838, CVE-2023-51781, CVE-2023-6121, CVE-2024-0775, CVE-2024-1086, CVE-2024-24855
SHA-256 | d108bf63c9f6c68409d72c0c5efb406eb5a7df3eac89dd7759ede250d9eab4a6
Ubuntu Security Notice USN-6701-3
Posted Mar 26, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6701-3 - 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. It was discovered that the NVIDIA Tegra XUSB pad controller driver in the Linux kernel did not properly handle return values in certain error conditions. 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-2023-23000, CVE-2023-3006, CVE-2023-34256, CVE-2023-39197, CVE-2023-4132, CVE-2023-46838, CVE-2023-51781, CVE-2023-6121, CVE-2024-0775, CVE-2024-1086, CVE-2024-24855
SHA-256 | 5a4090a47f47b9d450d81add0c7c5cc25fe72ace31de291f6722899f4e03c608
Ubuntu Security Notice USN-6700-2
Posted Mar 22, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6700-2 - It was discovered that the Layer 2 Tunneling Protocol implementation in the Linux kernel contained a race condition when releasing PPPoL2TP sockets in certain conditions, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the ext4 file system implementation in the Linux kernel did not properly handle block device modification while it is mounted. A privileged attacker could use this to cause a denial of service or possibly expose sensitive information.

tags | advisory, denial of service, arbitrary, kernel, local, protocol
systems | linux, ubuntu
advisories | CVE-2022-20567, CVE-2023-34256, CVE-2023-39197, CVE-2023-51781, CVE-2024-0775, CVE-2024-1086, CVE-2024-24855
SHA-256 | 4c2466c5a1092f0062ced6462c5b58b113956d4b9c6caa9042e032feef05a6f5
Ubuntu Security Notice USN-6701-2
Posted Mar 21, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6701-2 - 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. It was discovered that the NVIDIA Tegra XUSB pad controller driver in the Linux kernel did not properly handle return values in certain error conditions. 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-2023-23000, CVE-2023-3006, CVE-2023-34256, CVE-2023-39197, CVE-2023-4132, CVE-2023-46838, CVE-2023-51781, CVE-2023-6121, CVE-2024-0775, CVE-2024-1086, CVE-2024-24855
SHA-256 | 7f5c37bdac372f1e14614b207db5ae250b9cfd02c3c09102b02e27d97b401d28
Ubuntu Security Notice USN-6701-1
Posted Mar 19, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6701-1 - 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. It was discovered that the NVIDIA Tegra XUSB pad controller driver in the Linux kernel did not properly handle return values in certain error conditions. 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-2023-23000, CVE-2023-3006, CVE-2023-34256, CVE-2023-39197, CVE-2023-4132, CVE-2023-46838, CVE-2023-51781, CVE-2023-6121, CVE-2024-0775, CVE-2024-1086, CVE-2024-24855
SHA-256 | 0833ffba4bae800112f39bda1a9de1cfd5e670b6c7f675b6d89f769e4de4aba7
Ubuntu Security Notice USN-6700-1
Posted Mar 19, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6700-1 - It was discovered that the Layer 2 Tunneling Protocol implementation in the Linux kernel contained a race condition when releasing PPPoL2TP sockets in certain conditions, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the ext4 file system implementation in the Linux kernel did not properly handle block device modification while it is mounted. A privileged attacker could use this to cause a denial of service or possibly expose sensitive information.

tags | advisory, denial of service, arbitrary, kernel, local, protocol
systems | linux, ubuntu
advisories | CVE-2022-20567, CVE-2023-34256, CVE-2023-39197, CVE-2023-51781, CVE-2024-0775, CVE-2024-1086, CVE-2024-24855
SHA-256 | 2c7355c5b5d096d3837750dde9769934b471e8730c5ae98b584551bed8fee54c
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