Description
An issue was discovered in QEMU through 5.1.0. An out-of-bounds memory access was found in the ATI VGA device implementation. This flaw occurs in the ati_2d_blt() routine in hw/display/ati_2d.c while handling MMIO write operations through the ati_mm_write() callback. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service.
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 | 1:5.2+dfsg-1 | — |
| Debian 13 | qemu | 1:5.2+dfsg-1 | — |
| Debian 12 | qemu | 1:5.2+dfsg-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | qemu | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | qemu | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | qemu | 4.2.1-11.10.1 | SUSE-SU-2020:2877-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.2 | qemu +2 | 4.2.1-lp152.9.6.1 | openSUSE-SU-2020:1664-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | qemu | 5.2.0-r0 | — |
| Alpine v3.23 | qemu | 5.2.0-r0 | — |
| Alpine v3.22 | qemu | 5.2.0-r0 | — |
| Alpine v3.21 | qemu | 5.2.0-r0 | — |
| Alpine v3.20 | qemu | 5.2.0-r0 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | qemu | 5.2.0-r0 | — |
| Alpine v3.18 | qemu | 5.2.0-r0 | — |
| Alpine v3.17 | qemu | 5.2.0-r0 | — |
| Alpine v3.16 | qemu | 5.2.0-r0 | — |
Advisories 2
- SUSE-SU-2020:2877-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1664-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026