Packages
- linux-azure - Linux kernel for Microsoft Azure Cloud systems
- linux-azure-5.4 - Linux kernel for Microsoft Azure cloud systems
Details
Ye Zhang and Nicolas Wu discovered that the io_uring subsystem in the Linux
kernel did not properly handle locking for rings with IOPOLL, leading to a
double-free vulnerability. A local attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2023-21400)
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:
- TTY drivers;
- Netfilter;
- Network traffic control;
- VMware vSockets driver
Ye Zhang and Nicolas Wu discovered that the io_uring subsystem in the Linux
kernel did not properly handle locking for rings with IOPOLL, leading to a
double-free vulnerability. A local attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2023-21400)
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:
- TTY drivers;
- Netfilter;
- Network traffic control;
- VMware vSockets driver
Update instructions
After a standard system update you need to reboot your computer to make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
Ubuntu Release | Package Version | ||
---|---|---|---|
20.04 focal | linux-image-5.4.0-1143-azure – 5.4.0-1143.150 | ||
linux-image-azure-lts-20.04 – 5.4.0.1143.137 | |||
18.04 bionic | linux-image-5.4.0-1143-azure – 5.4.0-1143.150~18.04.1 | ||
linux-image-azure – 5.4.0.1143.150~18.04.1 |
Reduce your security exposure
Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.
References
Related notices
- USN-7468-1
- USN-7413-1
- USN-7390-1
- USN-7389-1
- USN-7344-1
- USN-7344-2
- USN-7342-1
- USN-7311-1
- USN-7310-1
- USN-7308-1
- USN-7468-1
- USN-7413-1
- USN-7390-1
- USN-7389-1
- USN-7344-1
- USN-7344-2
- USN-7342-1
- USN-7311-1
- USN-7310-1
- USN-7308-1
- USN-7295-1
- USN-7277-1
- USN-7276-1
- USN-7262-1
- USN-7262-2
- USN-7238-1
- USN-7238-2
- USN-7238-3
- USN-7238-4
- USN-7237-1
- USN-7236-1
- USN-7236-2
- USN-7236-3
- USN-7235-1
- USN-7235-2
- USN-7235-3
- USN-7234-1
- USN-7234-2
- USN-7234-4
- USN-7234-5
- USN-7233-1
- USN-7233-2
- USN-7233-3
- USN-7232-1
- USN-7029-1
- USN-7019-1
- USN-7009-1
- USN-7009-2
- USN-7008-1
- USN-7007-1
- USN-7007-2
- USN-7007-3
- USN-7005-1
- USN-7005-2
- USN-7004-1
- USN-6999-1
- USN-6999-2
- USN-6348-1
- USN-6332-1
- USN-6330-1
- USN-6325-1
- USN-6315-1
- LSN-0109-1
- LSN-0098-1
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