CVE-2023-2861
qemu: A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU
CVE-2023-2861 is fixed in 22 products on 1 platform, first by kvmtool 0.20170904-1ubuntu0.18.04.1~esm1, released June 29, 2023. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.1
high
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0038
31st percentile
A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU. The 9pfs server did not prohibit opening special files on the host side, potentially allowing a malicious client to escape from the exported 9p tree by creating and opening a device file in the shared folder.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| kvmtool · Ubuntu 18.04.6 LTS (bionic) | 0.20170904-1ubuntu0.18.04.1~esm1 | kvmtool 0.20170904-1ubuntu0.18.04.1~esm1 | Jun 29, 2023 |
| kvmtool · Ubuntu 20.04 LTS (focal) | 0.20170904-1ubuntu0.20.04.1~esm1 | kvmtool 0.20170904-1ubuntu0.20.04.1~esm1 | Jun 29, 2023 |
| kvmtool · Ubuntu 22.04.1 LTS (jammy) | 0.20170904-1.1ubuntu0.1~esm2 | kvmtool 0.20170904-1.1ubuntu0.1~esm2 | Jun 29, 2023 |
| qemu · Debian 12.15 (bookworm) | 1:7.2+dfsg-7+deb12u1 | DEBIAN-CVE-2023-2861 | Dec 6, 2023 |
| qemu · Debian 13.5 (trixie) | 1:8.0.3+dfsg-1 | DEBIAN-CVE-2023-2861 | Dec 6, 2023 |
| qemu · Debian 14 | 1:8.0.3+dfsg-1 | DEBIAN-CVE-2023-2861 | Dec 6, 2023 |
| qemu · Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.42+esm5 | qemu 1:2.11+dfsg-1ubuntu7.42+esm5 | Feb 19, 2026 |
| qemu · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-block-extra · Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.42+esm5 | qemu-block-extra 1:2.11+dfsg-1ubuntu7.42+esm5 | Feb 19, 2026 |
| qemu-block-extra · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-block-extra 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-block-extra · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-block-extra 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-guest-agent · Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.42+esm5 | qemu-guest-agent 1:2.11+dfsg-1ubuntu7.42+esm5 | Feb 19, 2026 |
| qemu-guest-agent · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-guest-agent 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-guest-agent · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-guest-agent 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-kvm · Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.42+esm5 | qemu-kvm 1:2.11+dfsg-1ubuntu7.42+esm5 | Feb 19, 2026 |
| qemu-kvm · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-kvm 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-system · Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.42+esm5 | qemu-system 1:2.11+dfsg-1ubuntu7.42+esm5 | Feb 19, 2026 |
| qemu-system · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-system 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-system · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-system 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-system-arm · Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.42+esm5 | qemu-system-arm 1:2.11+dfsg-1ubuntu7.42+esm5 | Feb 19, 2026 |
| qemu-system-arm · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-system-arm 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-system-arm · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-system-arm 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-system-common · Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.42+esm5 | qemu-system-common 1:2.11+dfsg-1ubuntu7.42+esm5 | Feb 19, 2026 |
| qemu-system-common · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-system-common 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-system-common · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-system-common 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-system-data · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-system-data 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-system-data · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-system-data 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-system-gui · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-system-gui 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-system-gui · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-system-gui 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-system-mips · Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.42+esm5 | qemu-system-mips 1:2.11+dfsg-1ubuntu7.42+esm5 | Feb 19, 2026 |
| qemu-system-mips · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-system-mips 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-system-mips · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-system-mips 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-system-misc · Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.42+esm5 | qemu-system-misc 1:2.11+dfsg-1ubuntu7.42+esm5 | Feb 19, 2026 |
| qemu-system-misc · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-system-misc 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-system-misc · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-system-misc 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-system-ppc · Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.42+esm5 | qemu-system-ppc 1:2.11+dfsg-1ubuntu7.42+esm5 | Feb 19, 2026 |
| qemu-system-ppc · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-system-ppc 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-system-ppc · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-system-ppc 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-system-s390x · Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.42+esm5 | qemu-system-s390x 1:2.11+dfsg-1ubuntu7.42+esm5 | Feb 19, 2026 |
| qemu-system-s390x · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-system-s390x 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-system-s390x · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-system-s390x 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-system-sparc · Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.42+esm5 | qemu-system-sparc 1:2.11+dfsg-1ubuntu7.42+esm5 | Feb 19, 2026 |
| qemu-system-sparc · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-system-sparc 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-system-sparc · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-system-sparc 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-system-x86 · Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.42+esm5 | qemu-system-x86 1:2.11+dfsg-1ubuntu7.42+esm5 | Feb 19, 2026 |
| qemu-system-x86 · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-system-x86 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-system-x86 · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-system-x86 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-system-x86-microvm · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-system-x86-microvm 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-system-x86-microvm · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-system-x86-microvm 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-system-x86-xen · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-system-x86-xen 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-system-x86-xen · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-system-x86-xen 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-user · Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.42+esm5 | qemu-user 1:2.11+dfsg-1ubuntu7.42+esm5 | Feb 19, 2026 |
| qemu-user · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-user 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-user · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-user 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-user-binfmt · Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.42+esm5 | qemu-user-binfmt 1:2.11+dfsg-1ubuntu7.42+esm5 | Feb 19, 2026 |
| qemu-user-binfmt · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-user-binfmt 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-user-binfmt · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-user-binfmt 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-user-static · Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.42+esm5 | qemu-user-static 1:2.11+dfsg-1ubuntu7.42+esm5 | Feb 19, 2026 |
| qemu-user-static · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-user-static 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-user-static · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-user-static 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
| qemu-utils · Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.42+esm5 | qemu-utils 1:2.11+dfsg-1ubuntu7.42+esm5 | Feb 19, 2026 |
| qemu-utils · Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.28 | qemu-utils 1:4.2-3ubuntu6.28 | Nov 3, 2023 |
| qemu-utils · Ubuntu 22.04.1 LTS (jammy) | 1:6.2+dfsg-2ubuntu6.16 | qemu-utils 1:6.2+dfsg-2ubuntu6.16 | Nov 3, 2023 |
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