| Name | CVE-2019-14284 |
| Description | In the Linux kernel before 5.2.3, drivers/block/floppy.c allows a denial of service by setup_format_params division-by-zero. Two consecutive ioctls can trigger the bug: the first one should set the drive geometry with .sect and .rate values that make F_SECT_PER_TRACK be zero. Next, the floppy format operation should be called. It can be triggered by an unprivileged local user even when a floppy disk has not been inserted. NOTE: QEMU creates the floppy device by default. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-1884-1, DLA-1885-1, DSA-4495-1, DSA-4497-1, ELA-156-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| linux (PTS) | jessie, jessie (lts) | 3.16.84-1 | fixed |
| stretch (security) | 4.9.320-2 | fixed | |
| stretch (lts), stretch | 4.9.320-3 | fixed | |
| buster (security), buster, buster (lts) | 4.19.316-1 | fixed | |
| bullseye | 5.10.223-1 | fixed | |
| bullseye (security) | 5.10.226-1 | fixed | |
| bookworm | 6.1.115-1 | fixed | |
| bookworm (security) | 6.1.119-1 | fixed | |
| trixie | 6.12.5-1 | fixed | |
| sid | 6.12.6-1 | fixed | |
| linux-4.9 (PTS) | jessie, jessie (lts) | 4.9.303-1~deb8u3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| linux | source | wheezy | 3.16.72-1~deb7u1 | ELA-156-1 | ||
| linux | source | jessie | 3.16.72-1 | DLA-1884-1 | ||
| linux | source | stretch | 4.9.168-1+deb9u5 | DSA-4497-1 | ||
| linux | source | buster | 4.19.37-5+deb10u2 | DSA-4495-1 | ||
| linux | source | (unstable) | 5.2.6-1 | |||
| linux-4.9 | source | jessie | 4.9.168-1+deb9u5~deb8u1 | DLA-1885-1 |
Fixed by: https://git.kernel.org/linus/f3554aeb991214cbfafd17d55e2bfddb50282e32