Description
A flaw was found in the virtio-fs shared file system daemon (virtiofsd) of QEMU. The new 'xattrmap' option may cause the 'security.capability' xattr in the guest to not drop on file write, potentially leading to a modified, privileged executable in the guest. In rare circumstances, this flaw could be used by a malicious user to elevate their privileges within the guest.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | QEMU | qemu 5.2.50 | — |
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-9 | — |
| Debian 13 | qemu | 1:5.2+dfsg-9 | — |
| Debian 12 | qemu | 1:5.2+dfsg-9 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | qemu | 5.2.0-17.1 | SUSE-SU-2021:1942-1 |
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 | 5.2.0-17.1 | openSUSE-SU-2021:1942-1 |
Advisories 3
- 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