Description
A heap-based buffer overflow was found in QEMU through 5.0.0 in the SDHCI device emulation support. It could occur while doing a multi block SDMA transfer via the sdhci_sdma_transfer_multi_blocks() routine in hw/sd/sdhci.c. A guest user or process could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition, or potentially execute arbitrary code with privileges of the QEMU process on the host.
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-10 | — |
| Debian 13 | qemu | 1:5.2+dfsg-10 | — |
| Debian 12 | qemu | 1:5.2+dfsg-10 | — |
| Debian 10 | qemu | 1:3.1+dfsg-8+deb10u10 | DLA-3362-1 |
| Debian 9 | qemu | 1:2.8+dfsg-6+deb9u14 | DLA-2623-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | qemu | 1:4.2-3ubuntu6.10 | USN-4650-1 |
| Ubuntu 18.04 LTS | qemu | 1:2.11+dfsg-1ubuntu7.34 | USN-4650-1 |
| Ubuntu 16.04 LTS | qemu | 1:2.5+dfsg-5ubuntu10.48 | USN-4650-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | qemu | 2.0.0+dfsg-2ubuntu1.47+esm6 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | qemu | 5.2.0-17.1 | SUSE-SU-2021:1942-1 |
| SLES 15 SP1 | qemu | 3.1.1.1-150100.80.43.2 | SUSE-SU-2022:3768-1 |
| SLES 12 SP5 | qemu | 3.1.1.1-66.1 | SUSE-SU-2023:0761-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP1 | qemu | 3.1.1.1-150100.80.43.2 | SUSE-SU-2022:3768-1 |
| SLES for SAP 12 SP5 | qemu | 3.1.1.1-66.1 | SUSE-SU-2023:0761-1 |
| SLE HPC 15 SP1 | qemu | 3.1.1.1-150100.80.43.2 | SUSE-SU-2022:3768-1 |
| SUSE Enterprise Storage 6 | qemu | 3.1.1.1-150100.80.43.2 | SUSE-SU-2022:3768-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | qemu | 6.1.0-32.1 | openSUSE-SU-2024:11287-1 |
| openSUSE Leap 15.3 | qemu | 3.1.1.1-150100.80.43.2 | openSUSE-SU-2021:1942-1, SUSE-SU-2022:3768-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | qemu | 5.1.0-r1 | — |
| Alpine v3.23 | qemu | 5.1.0-r1 | — |
| Alpine v3.22 | qemu | 5.1.0-r1 | — |
| Alpine v3.21 | qemu | 5.1.0-r1 | — |
| Alpine v3.20 | qemu | 5.1.0-r1 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | qemu | 5.1.0-r1 | — |
| Alpine v3.18 | qemu | 5.1.0-r1 | — |
| Alpine v3.17 | qemu | 5.1.0-r1 | — |
| Alpine v3.16 | qemu | 5.1.0-r1 | — |
Advisories 9
- WID-SEC-2022-1749 QEMU: Schwachstelle ermöglicht Ausführen von beliebigem Programmcode mit den Rechten des Dienstes BSI CERT-Bund (WID) · Jun 29, 2026
- USN-4650-1 qemu vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-3362-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2623-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2023:0761-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1942-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1942-1 Security update for qemu SUSE / openSUSE Security Updates · May 7, 2025
- openSUSE-SU-2024:11287-1 qemu-6.1.0-32.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- SUSE-SU-2022:3768-1 Security update for qemu SUSE / openSUSE Security Updates · May 2, 2025
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1862167
- https://lists.nongnu.org/archive/html/qemu-devel/2020-09/msg01175.html
- [oss-security] 20210309 CVE-2021-3409 QEMU: sdhci: incomplete fix for CVE-2020-17380/CVE-2020-25085 mailing-list
- https://security.netapp.com/advisory/ntap-20210312-0003/
- [debian-lts-announce] 20210410 [SECURITY] [DLA 2623-1] qemu security update mailing-list