CVE-2019-19241 Privilege escalation in n/a

What is CVE-2019-19241?

CVE-2019-19241 is a high-severity vulnerability in Linux kernel, published on 17 Dec 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel before 5.4.2, the io_uring feature leads to requests that inadvertently have UID 0 and full capabilities, aka CID-181e448d8709. This is related to fs/io-wq.c, fs/io_uring.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 IORING_OP_SENDMSG operations, although requested in the context of an unprivileged user, are sometimes performed by a kernel worker thread without considering that context.

Which versions are affected by CVE-2019-19241?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2019-19241?

Apply the vendor's patch.

Is CVE-2019-19241 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-19241 exists.

Public exploit code: 1 Exploit-DB entry.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2019-19241, GHSA-wxfp-qr5h-g4wx, UBUNTU-CVE-2019-19241.