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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 5.2.6-1 | — |
| Debian 13 | linux | 5.2.6-1 | — |
| Debian 12 | linux | 5.2.6-1 | — |
| Debian 10 | linux | 4.19.37-5+deb10u2 | DSA-4495-1 |
| Debian 9 | linux | 4.9.168-1+deb9u5 | DSA-4497-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | linux | 3.16.72-1 | DLA-1884-1 |
| Debian 8 | linux-4.9 | 4.9.168-1+deb9u5~deb8u1 | DLA-1885-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +2 | No fix yet | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-60.67 | USN-4115-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1047.49 | USN-4118-1 |
| Ubuntu 18.04 LTS | linux-azure | 5.0.0-1018.19~18.04.1 | USN-4114-1 |
| Ubuntu 18.04 LTS | linux-gcp | 4.15.0-1042.45 | — |
| Ubuntu 18.04 LTS | linux-gke-4.15 | 4.15.0-1041.43 | USN-4115-1 |
| Ubuntu 18.04 LTS | linux-gke-5.0 | 5.0.0-1015.15~18.04.1 | USN-4114-1 |
| Ubuntu 18.04 LTS | linux-hwe | 5.0.0-27.28~18.04.1 | USN-4114-1 |
| Ubuntu 18.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1043.43 | USN-4115-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1056.65 | — |
| Ubuntu 18.04 LTS | linux-oem-osp1 | 5.0.0-1020.22 | — |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1022.25 | USN-4115-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1044.47 | USN-4115-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1062.69 | — |
| Ubuntu 16.04 LTS | linux | 4.4.0-161.189 | USN-4116-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1092.103 | USN-4116-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1047.49~16.04.1 | USN-4118-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1056.61 | USN-4115-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1041.43 | USN-4115-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-60.67~16.04.1 | USN-4115-1 |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1056.63 | USN-4116-1 |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1022.25~16.04.1 | USN-4115-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1120.129 | USN-4116-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1124.130 | USN-4116-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 18.04 LTS | linux-aws-fips +2 | No fix yet | — |
| Ubuntu Pro FIPS 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2018.18 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2006.7 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1019.24 | — |
| Ubuntu Pro 14.04 LTS | linux | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1054.58 | — |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1059.64~14.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-164.192~14.04.1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | kernel-azure +2 | 4.12.14-8.13.1 | SUSE-SU-2019:2069-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-197.15.1 | SUSE-SU-2019:2073-1 |
| SLES 15 | kernel-azure +2 | 4.12.14-5.38.1 | SUSE-SU-2019:2068-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150.32.1 | SUSE-SU-2019:2071-1 |
| SLES 12 SP4 | kernel-azure +2 | 4.12.14-6.23.1 | SUSE-SU-2019:2070-1 |
| SLES 12 SP4 | kernel-docs +4 | 4.12.14-95.29.1 | SUSE-SU-2019:2072-1 |
| SLES 12 SP3 | kernel-syms +2 | 4.4.180-94.103.1 | SUSE-SU-2019:2263-1 |
| SLES 12 SP3 | kgraft-patch-SLE12-SP3_Update_28 | 1-4.3.1 | SUSE-SU-2019:2263-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.120.1 | SUSE-SU-2019:2299-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_32 | 1-3.3.1 | SUSE-SU-2019:2299-1 |
Show 18 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | kernel-xen +3 | 3.12.74-60.64.121.1 | SUSE-SU-2019:2262-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_36 | 1-2.3.1 | SUSE-SU-2019:2262-1 |
| SLES 12 | kernel-ec2 | 3.12.74-60.64.121.1 | SUSE-SU-2019:2262-1 |
| SLES 11 SP4 | kernel-ec2 +8 | 3.0.101-108.101.1 | SUSE-SU-2019:14157-1 |
| SLES for SAP 12 SP4 | kernel-azure +2 | 4.12.14-6.23.1 | SUSE-SU-2019:2070-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.29.1 | SUSE-SU-2019:2072-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.180-94.103.1 | SUSE-SU-2019:2263-1 |
| SLES for SAP 12 SP3 | kgraft-patch-SLE12-SP3_Update_28 | 1-4.3.1 | SUSE-SU-2019:2263-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.120.1 | SUSE-SU-2019:2299-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_32 | 1-3.3.1 | SUSE-SU-2019:2299-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.74-60.64.121.1 | SUSE-SU-2019:2262-1 |
| SLES for SAP 12 SP1 | kgraft-patch-SLE12-SP1_Update_36 | 1-2.3.1 | SUSE-SU-2019:2262-1 |
| SLE Real Time 12 SP4 | kernel-rt +3 | 4.12.14-8.3.1 | SUSE-SU-2019:2450-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.15.1 | SUSE-SU-2019:2073-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_4 | 1-3.5.1 | SUSE-SU-2019:2073-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.32.1 | SUSE-SU-2019:2071-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_13 | 1-1.5.1 | SUSE-SU-2019:2071-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_7 | 1-6.5.1 | SUSE-SU-2019:2072-1 |
| SUSE Real Time Module 15 SP1 | kernel-rt +3 | 4.12.14-14.8.1 | SUSE-SU-2019:2430-1 |
| SUSE OpenStack Cloud Crowbar 8 | kernel-syms +2 | 4.4.180-94.103.1 | SUSE-SU-2019:2263-1 |
| SUSE OpenStack Cloud Crowbar 8 | kgraft-patch-SLE12-SP3_Update_28 | 1-4.3.1 | SUSE-SU-2019:2263-1 |
| SUSE OpenStack Cloud 8 | kernel-syms +2 | 4.4.180-94.103.1 | SUSE-SU-2019:2263-1 |
| SUSE OpenStack Cloud 8 | kgraft-patch-SLE12-SP3_Update_28 | 1-4.3.1 | SUSE-SU-2019:2263-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.120.1 | SUSE-SU-2019:2299-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_32 | 1-3.3.1 | SUSE-SU-2019:2299-1 |
| SUSE HPE Helion OpenStack 8 | kernel-syms +2 | 4.4.180-94.103.1 | SUSE-SU-2019:2263-1 |
| SUSE HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_28 | 1-4.3.1 | SUSE-SU-2019:2263-1 |
| SUSE Enterprise Storage 5 | kernel-syms +2 | 4.4.180-94.103.1 | SUSE-SU-2019:2263-1 |
| SUSE Enterprise Storage 5 | kgraft-patch-SLE12-SP3_Update_28 | 1-4.3.1 | SUSE-SU-2019:2263-1 |
| SUSE Enterprise Storage 4 | kernel-syms +2 | 4.4.121-92.120.1 | SUSE-SU-2019:2299-1 |
| SUSE Enterprise Storage 4 | kgraft-patch-SLE12-SP2_Update_32 | 1-3.3.1 | SUSE-SU-2019:2299-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.1 | kernel-docs +8 | 4.12.14-lp151.28.13.1 | openSUSE-SU-2019:1923-1 |
| openSUSE Leap 15.0 | kernel-docs +8 | 4.12.14-lp150.12.70.1 | openSUSE-SU-2019:1924-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.40.1.el6uek | 0.4.5-3.el6 | ELSA-2019-4854 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.40.1.el7uek | 0.4.5-3.el7 | ELSA-2019-4854 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.40.1.el7uek | ELSA-2019-4854, ELSA-2019-4850, ELSA-2019-4836 |
| Oracle Linux 7 | perf +5 | 4.14.35-1902.7.3.el7uek | ELSA-2019-4836 |
Advisories 25
- USN-4115-1 linux, linux-azure, linux-gcp, linux-gke-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2 vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-4114-1 linux, linux-azure, linux-gcp, linux-gke-5.0, linux-hwe, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-4118-1 linux-aws vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-4116-1 linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- DSA-4497-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4495-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1885-1 linux-4.9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1884-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2019:2263-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2071-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1924-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2450-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2299-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1923-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2262-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2073-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2070-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2069-1 Security update for the Linux Kernel for Azure SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2068-1 Security update for the Linux Azure Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2072-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2430-1 Security update for kernel-source-rt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:14157-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2019-4854 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 20, 2019
- ELSA-2019-4850 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 20, 2019
- ELSA-2019-4836 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 12, 2019
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2.3
- https://github.com/torvalds/linux/commit/f3554aeb991214cbfafd17d55e2bfddb50282e32
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f3554aeb991214cbfafd17d55e2bfddb50282e32
- DSA-4495 vendor-advisory
- 20190812 [SECURITY] [DSA 4495-1] linux security update mailing-list
- 20190813 [SECURITY] [DSA 4497-1] linux security update mailing-list
- DSA-4497 vendor-advisory
- [debian-lts-announce] 20190814 [SECURITY] [DLA 1884-1] linux security update mailing-list
- 20190814 [slackware-security] Slackware 14.2 kernel (SSA:2019-226-01) mailing-list
- [debian-lts-announce] 20190814 [SECURITY] [DLA 1885-1] linux-4.9 security update mailing-list
- http://packetstormsecurity.com/files/154059/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
- openSUSE-SU-2019:1924 vendor-advisory
- openSUSE-SU-2019:1923 vendor-advisory
- USN-4117-1 vendor-advisory
- USN-4114-1 vendor-advisory
- USN-4115-1 vendor-advisory
- USN-4116-1 vendor-advisory
- USN-4118-1 vendor-advisory
- https://security.netapp.com/advisory/ntap-20190905-0002/
- http://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LSN-0055-1.html
- http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html