CVE-2019-19241: High severity Linux Linux kernel vulnerability
In the Linux kernel before 5.4.2, the iouring feature leads to requests that inadvertently have UID 0 and full capabilities, aka CID-181e448d8709. This is related to fs/io-wq.c, fs/iouring.c, and net/socket.c. For example, an attacker can bypass intended restrictions on adding an IPv4 address to the loopback interface. This occurs because IORINGOPSENDMSG operations, although requested in the context of an unprivileged user, are sometimes performed by a kernel worker thread without considering that context.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.113-1Fixed in 7.2.12-1Fixed in 7.2.13-1 - Upgrade
Upgrade
Linux kernelto a version that resolves this vulnerability.Fixed in 5.4.2
Event History
Frequently Asked Questions
What is CVE-2019-19241?
CVE-2019-19241 is a vulnerability in the Linux kernel before version 5.4.2 that allows an attacker to bypass intended restrictions.
What is the severity of CVE-2019-19241?
The severity of CVE-2019-19241 is not specified in the information provided.
How does CVE-2019-19241 work?
CVE-2019-19241 is related to the io_uring feature in the Linux kernel and can lead to requests that have UID 0 and full capabilities, allowing an attacker to bypass restrictions.
Which software versions are affected by CVE-2019-19241?
Software versions before Linux kernel 5.4.2 are affected by CVE-2019-19241.
How can CVE-2019-19241 be fixed?
To fix CVE-2019-19241, users should update their Linux kernel to version 5.4.2 or later.