| Name | CVE-2019-19241 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| linux (PTS) | buster | 4.19.249-2 | fixed |
| buster (security) | 4.19.289-2 | fixed | |
| bullseye | 5.10.178-3 | fixed | |
| bullseye (security) | 5.10.191-1 | fixed | |
| bookworm | 6.1.38-1 | fixed | |
| bookworm (security) | 6.1.52-1 | fixed | |
| sid, trixie | 6.5.3-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| linux | source | jessie | (not affected) | |||
| linux | source | stretch | (not affected) | |||
| linux | source | buster | (not affected) | |||
| linux | source | (unstable) | 5.3.15-1 |
[buster] - linux <not-affected> (Vulnerable code introduced later)
[stretch] - linux <not-affected> (Vulnerable code introduced later)
[jessie] - linux <not-affected> (Vulnerable code introduced later)
https://bugs.chromium.org/p/project-zero/issues/detail?id=1975
https://git.kernel.org/linus/181e448d8709e517c9c7b523fcd209f24eb38ca7
https://git.kernel.org/linus/d69e07793f891524c6bbf1e75b9ae69db4450953