Description
A use-after-free flaw was found in the MegaRAID emulator of QEMU. This issue occurs while processing SCSI I/O requests in the case of an error mptsas_free_request() that does not dequeue the request object 'req' from a pending requests queue. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. Versions between 2.10.0 and 5.2.0 are potentially affected.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | QEMU | between 2.10.0 and 5.2.0 | — |
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 | 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+deb10u9 | DLA-3099-1 |
| 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 | 1:4.2-3ubuntu6.17 | USN-5010-1 |
| Ubuntu 18.04 LTS | qemu | 1:2.11+dfsg-1ubuntu7.37 | USN-5010-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | qemu | 6.0.0-r1 | — |
| Alpine v3.23 | qemu | 6.0.0-r1 | — |
| Alpine v3.22 | qemu | 6.0.0-r1 | — |
| Alpine v3.21 | qemu | 6.0.0-r1 | — |
| Alpine v3.20 | qemu | 6.0.0-r1 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | qemu | 6.0.0-r1 | — |
| Alpine v3.18 | qemu | 6.0.0-r1 | — |
| Alpine v3.17 | qemu | 6.0.0-r1 | — |
| Alpine v3.16 | qemu | 6.0.0-r1 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | qemu +26 | 10:3.1.0-8.amzn2.0.10 | ALAS2-2023-2061 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | hivex +4 | 1.3.18-20.module+el8.4.0+20319+6eb4347c | ELSA-2021-9568 |
| Oracle Linux 8 | libguestfs-winsupport | 8.2-1.module+el8.4.0+20319+6eb4347c | ELSA-2021-9568 |
| Oracle Linux 8 | libiscsi +2 | 1.18.0-8.module+el8.4.0+20319+6eb4347c | ELSA-2021-9568 |
| Oracle Linux 8 | libnbd +3 | 1.2.2-1.module+el8.4.0+20319+6eb4347c | ELSA-2021-9568 |
| Oracle Linux 8 | libvirt +29 | 5.7.0-31.module+el8.4.0+20319+6eb4347c | ELSA-2021-9568 |
| Oracle Linux 8 | libvirt-dbus | 1.3.0-2.module+el8.4.0+20319+6eb4347c | ELSA-2021-9568 |
| Oracle Linux 8 | nbdkit +13 | 1.16.2-4.0.1.module+el8.4.0+20319+6eb4347c | ELSA-2021-9568 |
| Oracle Linux 8 | netcf +2 | 0.2.8-12.module+el8.4.0+20319+6eb4347c | ELSA-2021-9568 |
| Oracle Linux 8 | perl-Sys-Virt | 4.5.0-5.module+el8.4.0+20319+6eb4347c | ELSA-2021-9568 |
| Oracle Linux 8 | qemu-img +9 | 15:4.2.1-11.module+el8.4.0+20319+6eb4347c | ELSA-2021-9568 |
| Oracle Linux 8 | seabios +2 | 1.13.0-2.module+el8.4.0+20319+6eb4347c | ELSA-2021-9568 |
| Oracle Linux 8 | sgabios +1 | 1:0.20170427git-3.module+el8.4.0+20319+6eb4347c | ELSA-2021-9568 |
| Oracle Linux 8 | supermin +1 | 5.1.19-10.module+el8.4.0+20319+6eb4347c | ELSA-2021-9568 |
| Oracle Linux 8 | virt-dib +23 | 1:1.40.2-25.0.1.module+el8.4.0+20319+6eb4347c | ELSA-2021-9568 |
| Oracle Linux 7 | qemu +12 | 15:4.2.1-11.el7 | ELSA-2021-9425 |
Advisories 7
- USN-5010-1 qemu vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-3099-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2623-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- WID-SEC-2022-1278 QEMU: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Sep 2, 2024
- ALAS2-2023-2061 Moderate: qemu security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 1, 2023
- ELSA-2021-9568 Important: virt:kvm_utils security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Dec 1, 2021
- ELSA-2021-9425 Important: qemu security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 17, 2021
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1924042
- https://bugs.launchpad.net/qemu/+bug/1914236
- [debian-lts-announce] 20210410 [SECURITY] [DLA 2623-1] qemu security update mailing-list
- https://security.netapp.com/advisory/ntap-20210507-0001/
- [debian-lts-announce] 20220905 [SECURITY] [DLA 3099-1] qemu security update mailing-list