Description
A NULL pointer dereference flaw was found in the megasas-gen2 SCSI host bus adapter emulation of QEMU in versions before and including 6.0. This issue occurs in the megasas_command_cancelled() callback function while dropping a SCSI request. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | QEMU | All QEMU versions before and including 6.0 | — |
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 | qemu | No fix yet | — |
| Debian 13 | qemu | No fix yet | — |
| Debian 12 | qemu | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | qemu +1 | No fix yet | — |
| Ubuntu 26.04 LTS | qemu +1 | No fix yet | — |
| Ubuntu 25.10 | qemu | No fix yet | — |
| Ubuntu 24.04 LTS | qemu | No fix yet | — |
| Ubuntu 22.04 LTS | qemu | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | qemu | No fix yet | — |
| Ubuntu Pro 18.04 LTS | qemu | No fix yet | — |
| Ubuntu Pro 16.04 LTS | qemu | No fix yet | — |
| Ubuntu Pro 14.04 LTS | qemu | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | qemu | 5.2.0-103.2 | SUSE-SU-2021:2858-1 |
| SLES 15 SP2 | qemu | 4.2.1-11.28.1 | SUSE-SU-2021:2789-1 |
| SLES 15 SP1 | qemu | 3.1.1.1-80.40.1 | SUSE-SU-2021:3614-1 |
| SLES 15 | qemu | 2.11.2-70.59.1 | SUSE-SU-2021:3613-1 |
| SLES 12 SP5 | qemu | 3.1.1.1-57.2 | SUSE-SU-2021:2813-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | qemu | 2.11.2-5.40.2 | SUSE-SU-2021:3635-1 |
| SLES 12 SP2 | qemu | 2.6.2-41.73.1 | SUSE-SU-2021:3575-1 |
| SLES for SAP 15 SP1 | qemu | 3.1.1.1-80.40.1 | SUSE-SU-2021:3614-1 |
| SLES for SAP 15 | qemu | 2.11.2-70.59.1 | SUSE-SU-2021:3613-1 |
| SLES for SAP 12 SP5 | qemu | 3.1.1.1-57.2 | SUSE-SU-2021:2813-1 |
| SLES for SAP 12 SP4 | qemu | 2.11.2-5.40.2 | SUSE-SU-2021:3635-1 |
| SLE Micro 5.0 | qemu | 4.2.1-11.28.1 | SUSE-SU-2021:2789-1 |
| SLE HPC 15 SP1 | qemu | 3.1.1.1-80.40.1 | SUSE-SU-2021:3614-1 |
| SLE HPC 15 | qemu | 2.11.2-70.59.1 | SUSE-SU-2021:3613-1 |
| SUSE OpenStack Cloud Crowbar 9 | qemu | 2.11.2-5.40.2 | SUSE-SU-2021:3635-1 |
| SUSE OpenStack Cloud 9 | qemu | 2.11.2-5.40.2 | SUSE-SU-2021:3635-1 |
| SUSE Enterprise Storage 6 | qemu | 3.1.1.1-80.40.1 | SUSE-SU-2021:3614-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | qemu | 6.2.0-41.1 | openSUSE-SU-2024:11907-1 |
| openSUSE Leap 15.3 | qemu | 3.1.1.1-80.40.1 | openSUSE-SU-2021:3614-1, openSUSE-SU-2021:2858-1, openSUSE-SU-2021:2789-1 |
| openSUSE Leap 15.2 | qemu +2 | 4.2.1-lp152.9.20.1 | openSUSE-SU-2021:1202-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | qemu | 6.1.0-r0 | — |
| Alpine v3.23 | qemu | 6.1.0-r0 | — |
| Alpine v3.22 | qemu | 6.1.0-r0 | — |
| Alpine v3.21 | qemu | 6.1.0-r0 | — |
| Alpine v3.20 | qemu | 6.1.0-r0 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | qemu | 6.1.0-r0 | — |
| Alpine v3.18 | qemu | 6.1.0-r0 | — |
| Alpine v3.17 | qemu | 6.1.0-r0 | — |
| Alpine v3.16 | qemu | 6.1.0-r0 | — |
Advisories 13
- WID-SEC-2022-2259 QEMU: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Jun 29, 2026
- SUSE-SU-2021:3614-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3613-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:3614-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3575-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:2789-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2789-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1202-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:2858-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3635-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11907-1 qemu-6.2.0-41.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- SUSE-SU-2021:2858-1 Security update for qemu SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2021:2813-1 Security update for qemu SUSE / openSUSE Security Updates · May 2, 2025