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Linux Azure kernel can crash from local attacks
published 2 years ago
Summary
The Linux kernel used in Azure (canonical/linux-azure) has several coding errors that could let a user with local access cause the system to stop working or even crash a virtual machine. These problems affect NFC, Bluetooth, flash storage, confidential computing, GPU, HID, I2C and other drivers. Install the latest kernel updates from your vendor as soon as possible to prevent crashes and potential code execution.
What to do
- Update canonical linux-azure to version 4.15.0-1179.194~16.04.1.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Ubuntu:Pro:16.04:LTS | canonical | linux-azure |
< 4.15.0-1179.194~16.04.1 Fix: upgrade to 4.15.0-1179.194~16.04.1
|
Original advisory text
linux-azure vulnerabilities
黄思聪 discovered that the NFC Controller Interface (NCI) implementation in
the Linux kernel did not properly handle certain memory allocation failure
conditions, leading to a null pointer dereference vulnerability. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2023-46343)
It was discovered that a race condition existed in the Bluetooth subsystem
in the Linux kernel when modifying certain settings values through debugfs.
A privileged local attacker could use this to cause a denial of service.
(CVE-2024-24857, CVE-2024-24858, CVE-2024-24859)
Chenyuan Yang discovered that the Unsorted Block Images (UBI) flash device
volume management subsystem did not properly validate logical eraseblock
sizes in certain situations. An attacker could possibly use this to cause a
denial of service (system crash). (CVE-2024-25739)
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 (guest crash) or possibly execute arbitrary code.
(CVE-2024-25744)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- GPU drivers;
- HID subsystem;
- I2C subsystem;
- MTD block device drivers;
- Network drivers;
- TTY drivers;
- USB subsystem;
- File systems infrastructure;
- F2FS file system;
- SMB network file system;
- BPF subsystem;
- B.A.T.M.A.N. meshing protocol;
- Bluetooth subsystem;
- Networking core;
- IPv4 networking;
- IPv6 networking;
- Netfilter;
- Unix domain sockets;
- AppArmor security module;
(CVE-2023-52435, CVE-2024-27013, CVE-2024-35984, CVE-2023-52620,
CVE-2024-35997, CVE-2023-52436, CVE-2024-26884, CVE-2024-26901,
CVE-2023-52469, CVE-2024-35978, CVE-2024-26886, CVE-2024-35982,
CVE-2024-36902, CVE-2024-26857, CVE-2024-26923, CVE-2023-52443,
CVE-2024-27020, CVE-2024-36016, CVE-2024-26840, CVE-2024-26934,
CVE-2023-52449, CVE-2024-26882, CVE-2023-52444, CVE-2023-52752)
the Linux kernel did not properly handle certain memory allocation failure
conditions, leading to a null pointer dereference vulnerability. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2023-46343)
It was discovered that a race condition existed in the Bluetooth subsystem
in the Linux kernel when modifying certain settings values through debugfs.
A privileged local attacker could use this to cause a denial of service.
(CVE-2024-24857, CVE-2024-24858, CVE-2024-24859)
Chenyuan Yang discovered that the Unsorted Block Images (UBI) flash device
volume management subsystem did not properly validate logical eraseblock
sizes in certain situations. An attacker could possibly use this to cause a
denial of service (system crash). (CVE-2024-25739)
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 (guest crash) or possibly execute arbitrary code.
(CVE-2024-25744)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- GPU drivers;
- HID subsystem;
- I2C subsystem;
- MTD block device drivers;
- Network drivers;
- TTY drivers;
- USB subsystem;
- File systems infrastructure;
- F2FS file system;
- SMB network file system;
- BPF subsystem;
- B.A.T.M.A.N. meshing protocol;
- Bluetooth subsystem;
- Networking core;
- IPv4 networking;
- IPv6 networking;
- Netfilter;
- Unix domain sockets;
- AppArmor security module;
(CVE-2023-52435, CVE-2024-27013, CVE-2024-35984, CVE-2023-52620,
CVE-2024-35997, CVE-2023-52436, CVE-2024-26884, CVE-2024-26901,
CVE-2023-52469, CVE-2024-35978, CVE-2024-26886, CVE-2024-35982,
CVE-2024-36902, CVE-2024-26857, CVE-2024-26923, CVE-2023-52443,
CVE-2024-27020, CVE-2024-36016, CVE-2024-26840, CVE-2024-26934,
CVE-2023-52449, CVE-2024-26882, CVE-2023-52444, CVE-2023-52752)
References
- https://ubuntu.com/security/notices/USN-6926-3 Vendor Advisory
- https://ubuntu.com/security/CVE-2023-46343 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52435 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52436 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52443 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52444 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52449 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52469 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52620 Third Party Advisory
- https://ubuntu.com/security/CVE-2023-52752 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-24857 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-24858 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-24859 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-25739 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-25744 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-26840 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-26857 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-26882 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-26884 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-26886 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-26901 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-26923 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-26934 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-27013 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-27020 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-35978 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-35982 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-35984 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-35997 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-36016 Third Party Advisory
- https://ubuntu.com/security/CVE-2024-36902 Third Party Advisory
Timeline
Published9 Aug 2024
Updated17 Oct 2026
First seen17 Oct 2026
Sources
USN-6926-3 · OSV
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