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==========================================================================
Ubuntu Security Notice USN-7640-1
July 16, 2025
linux-iot vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- linux-iot: Linux kernel for IoT platforms
Details:
It was discovered that the CIFS network file system implementation in the
Linux kernel did not properly verify the target namespace when handling
upcalls. An attacker could use this to expose sensitive information.
(CVE-2025-2312)
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:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Drivers core;
- Network block device driver;
- Character device driver;
- iSCSI Boot Firmware Table Attributes driver;
- GPU drivers;
- HID subsystem;
- InfiniBand drivers;
- Media drivers;
- MemoryStick subsystem;
- Network drivers;
- NTB driver;
- PCI subsystem;
- PPS (Pulse Per Second) driver;
- PTP clock framework;
- RapidIO drivers;
- Real Time Clock drivers;
- SCSI subsystem;
- SLIMbus drivers;
- QCOM SoC drivers;
- Trusted Execution Environment drivers;
- Thermal drivers;
- USB DSL drivers;
- USB Device Class drivers;
- USB core drivers;
- USB Gadget drivers;
- USB Host Controller drivers;
- Renesas USBHS Controller drivers;
- File systems infrastructure;
- BTRFS file system;
- Ceph distributed file system;
- JFS file system;
- NILFS2 file system;
- UBI file system;
- KVM subsystem;
- L3 Master device support module;
- Netfilter;
- Process Accounting mechanism;
- printk logging mechanism;
- Scheduler infrastructure;
- Tracing infrastructure;
- Memory management;
- 802.1Q VLAN protocol;
- Asynchronous Transfer Mode (ATM) subsystem;
- B.A.T.M.A.N. meshing protocol;
- Bluetooth subsystem;
- Networking core;
- IPv4 networking;
- IPv6 networking;
- Logical Link layer;
- NFC subsystem;
- Open vSwitch;
- Rose network layer;
- Network traffic control;
- Sun RPC protocol;
- Wireless networking;
- Tomoyo security module;
- USB sound devices;
(CVE-2025-21753, CVE-2025-22071, CVE-2025-21898, CVE-2025-22073,
CVE-2024-58072, CVE-2025-21905, CVE-2024-57986, CVE-2025-21749,
CVE-2024-58020, CVE-2025-21806, CVE-2025-21917, CVE-2025-21719,
CVE-2025-21835, CVE-2025-21735, CVE-2025-21922, CVE-2025-21781,
CVE-2025-21904, CVE-2025-39735, CVE-2025-21715, CVE-2025-22007,
CVE-2024-58010, CVE-2024-58052, CVE-2025-22021, CVE-2025-21996,
CVE-2025-22086, CVE-2025-21971, CVE-2023-53034, CVE-2025-21721,
CVE-2025-22035, CVE-2025-21722, CVE-2025-22045, CVE-2025-21935,
CVE-2024-58069, CVE-2024-58017, CVE-2025-21823, CVE-2025-21959,
CVE-2024-26996, CVE-2024-58058, CVE-2025-21846, CVE-2024-58009,
CVE-2025-22018, CVE-2025-21926, CVE-2024-57980, CVE-2025-21728,
CVE-2025-21909, CVE-2025-21992, CVE-2024-26689, CVE-2024-57973,
CVE-2025-21772, CVE-2024-56599, CVE-2025-21791, CVE-2025-21718,
CVE-2025-21866, CVE-2025-21708, CVE-2024-58055, CVE-2025-21957,
CVE-2025-37937, CVE-2025-21704, CVE-2024-58093, CVE-2025-21877,
CVE-2025-22054, CVE-2023-52664, CVE-2025-21776, CVE-2024-50055,
CVE-2025-21765, CVE-2025-21862, CVE-2025-21865, CVE-2024-58014,
CVE-2021-47211, CVE-2025-21956, CVE-2025-21736, CVE-2021-47191,
CVE-2025-21647, CVE-2025-21920, CVE-2024-58051, CVE-2025-21782,
CVE-2025-21934, CVE-2023-52741, CVE-2025-38637, CVE-2025-21925,
CVE-2025-21763, CVE-2025-22063, CVE-2024-26982, CVE-2025-23136,
CVE-2024-57979, CVE-2025-22079, CVE-2025-22005, CVE-2025-21785,
CVE-2025-21859, CVE-2024-58085, CVE-2025-21764, CVE-2024-53168,
CVE-2024-58002, CVE-2025-21928, CVE-2025-21914, CVE-2024-56551,
CVE-2024-58007, CVE-2024-58001, CVE-2024-57981, CVE-2024-58083,
CVE-2025-21762, CVE-2025-21910, CVE-2025-21760, CVE-2025-21948,
CVE-2025-21993, CVE-2024-58090, CVE-2025-21991, CVE-2025-21848,
CVE-2025-21811, CVE-2024-58071, CVE-2025-21787, CVE-2025-21731,
CVE-2025-21814, CVE-2025-22004, CVE-2025-21744, CVE-2025-21858,
CVE-2025-21916, CVE-2023-52927, CVE-2025-22020, CVE-2025-21871,
CVE-2025-21761, CVE-2024-58063, CVE-2024-57977)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04 LTS
linux-image-5.4.0-1051-iot 5.4.0-1051.54
Available with Ubuntu Pro
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.
References:
https://ubuntu.com/security/notices/USN-7640-1
CVE-2021-47191, CVE-2021-47211, CVE-2023-52664, CVE-2023-52741,
CVE-2023-52927, CVE-2023-53034, CVE-2024-26689, CVE-2024-26982,
CVE-2024-26996, CVE-2024-50055, CVE-2024-53168, CVE-2024-56551,
CVE-2024-56599, CVE-2024-57973, CVE-2024-57977, CVE-2024-57979,
CVE-2024-57980, CVE-2024-57981, CVE-2024-57986, CVE-2024-58001,
CVE-2024-58002, CVE-2024-58007, CVE-2024-58009, CVE-2024-58010,
CVE-2024-58014, CVE-2024-58017, CVE-2024-58020, CVE-2024-58051,
CVE-2024-58052, CVE-2024-58055, CVE-2024-58058, CVE-2024-58063,
CVE-2024-58069, CVE-2024-58071, CVE-2024-58072, CVE-2024-58083,
CVE-2024-58085, CVE-2024-58090, CVE-2024-58093, CVE-2025-21647,
CVE-2025-21704, CVE-2025-21708, CVE-2025-21715, CVE-2025-21718,
CVE-2025-21719, CVE-2025-21721, CVE-2025-21722, CVE-2025-21728,
CVE-2025-21731, CVE-2025-21735, CVE-2025-21736, CVE-2025-21744,
CVE-2025-21749, CVE-2025-21753, CVE-2025-21760, CVE-2025-21761,
CVE-2025-21762, CVE-2025-21763, CVE-2025-21764, CVE-2025-21765,
CVE-2025-21772, CVE-2025-21776, CVE-2025-21781, CVE-2025-21782,
CVE-2025-21785, CVE-2025-21787, CVE-2025-21791, CVE-2025-21806,
CVE-2025-21811, CVE-2025-21814, CVE-2025-21823, CVE-2025-21835,
CVE-2025-21846, CVE-2025-21848, CVE-2025-21858, CVE-2025-21859,
CVE-2025-21862, CVE-2025-21865, CVE-2025-21866, CVE-2025-21871,
CVE-2025-21877, CVE-2025-21898, CVE-2025-21904, CVE-2025-21905,
CVE-2025-21909, CVE-2025-21910, CVE-2025-21914, CVE-2025-21916,
CVE-2025-21917, CVE-2025-21920, CVE-2025-21922, CVE-2025-21925,
CVE-2025-21926, CVE-2025-21928, CVE-2025-21934, CVE-2025-21935,
CVE-2025-21948, CVE-2025-21956, CVE-2025-21957, CVE-2025-21959,
CVE-2025-21971, CVE-2025-21991, CVE-2025-21992, CVE-2025-21993,
CVE-2025-21996, CVE-2025-22004, CVE-2025-22005, CVE-2025-22007,
CVE-2025-22018, CVE-2025-22020, CVE-2025-22021, CVE-2025-22035,
CVE-2025-22045, CVE-2025-22054, CVE-2025-22063, CVE-2025-22071,
CVE-2025-22073, CVE-2025-22079, CVE-2025-22086, CVE-2025-2312,
CVE-2025-23136, CVE-2025-37937, CVE-2025-38637, CVE-2025-39735
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