OESA-2026-4586

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-4586
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-4586.json
JSON Data
https://api.osv.dev/v1/vulns/OESA-2026-4586
Upstream
  • CVE-2026-93834
Published
2026-10-29T09:03:15Z
Modified
2026-10-29T09:15:35Z
Severity
  • 8.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
Summary
qemu security update
Details

QEMU is a FAST! processor emulator using dynamic translation to achieve good emulation speed.

Security Fix(es):

A use-after-free vulnerability was found in QEMU's 9pfs subsystem. A race condition between the main thread and a worker thread when processing concurrent Tlcreate and Twalk requests allows a malicious guest user to craft a fid path containing stale heap data, bypassing directory traversal restrictions and escaping the shared directory boundary. This can lead to arbitrary host file read/write and code execution (VM escape) as the QEMU process user.(CVE-2026-93834)

Database specific 
{
    "severity":  "High"
}
References

Affected packages

openEuler:24.03-LTS-SP3 / qemu

Package

Name
qemu
Purl
pkg:rpm/openEuler/qemu&distro=openEuler-24.03-LTS-SP3

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
8.2.0-94.oe2403sp3

Ecosystem specific 

{
    "aarch64":  [
        "qemu-8.2.0-94.oe2403sp3.aarch64.rpm",
        "qemu-block-curl-8.2.0-94.oe2403sp3.aarch64.rpm",
        "qemu-block-iscsi-8.2.0-94.oe2403sp3.aarch64.rpm",
        "qemu-block-rbd-8.2.0-94.oe2403sp3.aarch64.rpm",
        "qemu-block-ssh-8.2.0-94.oe2403sp3.aarch64.rpm",
        "qemu-debuginfo-8.2.0-94.oe2403sp3.aarch64.rpm",
        "qemu-debugsource-8.2.0-94.oe2403sp3.aarch64.rpm",
        "qemu-guest-agent-8.2.0-94.oe2403sp3.aarch64.rpm",
        "qemu-hw-usb-host-8.2.0-94.oe2403sp3.aarch64.rpm",
        "qemu-img-8.2.0-94.oe2403sp3.aarch64.rpm",
        "qemu-system-aarch64-8.2.0-94.oe2403sp3.aarch64.rpm",
        "qemu-system-arm-8.2.0-94.oe2403sp3.aarch64.rpm",
        "qemu-system-riscv-8.2.0-94.oe2403sp3.aarch64.rpm",
        "qemu-system-x86_64-8.2.0-94.oe2403sp3.aarch64.rpm",
        "qemu-user-8.2.0-94.oe2403sp3.aarch64.rpm",
        "qemu-user-binfmt-8.2.0-94.oe2403sp3.aarch64.rpm",
        "qemu-user-static-8.2.0-94.oe2403sp3.aarch64.rpm"
    ],
    "noarch":  [
        "qemu-help-8.2.0-94.oe2403sp3.noarch.rpm"
    ],
    "src":  [
        "qemu-8.2.0-94.oe2403sp3.src.rpm"
    ],
    "x86_64":  [
        "qemu-8.2.0-94.oe2403sp3.x86_64.rpm",
        "qemu-block-curl-8.2.0-94.oe2403sp3.x86_64.rpm",
        "qemu-block-iscsi-8.2.0-94.oe2403sp3.x86_64.rpm",
        "qemu-block-rbd-8.2.0-94.oe2403sp3.x86_64.rpm",
        "qemu-block-ssh-8.2.0-94.oe2403sp3.x86_64.rpm",
        "qemu-debuginfo-8.2.0-94.oe2403sp3.x86_64.rpm",
        "qemu-debugsource-8.2.0-94.oe2403sp3.x86_64.rpm",
        "qemu-guest-agent-8.2.0-94.oe2403sp3.x86_64.rpm",
        "qemu-hw-usb-host-8.2.0-94.oe2403sp3.x86_64.rpm",
        "qemu-img-8.2.0-94.oe2403sp3.x86_64.rpm",
        "qemu-seabios-8.2.0-94.oe2403sp3.x86_64.rpm",
        "qemu-system-aarch64-8.2.0-94.oe2403sp3.x86_64.rpm",
        "qemu-system-arm-8.2.0-94.oe2403sp3.x86_64.rpm",
        "qemu-system-riscv-8.2.0-94.oe2403sp3.x86_64.rpm",
        "qemu-system-x86_64-8.2.0-94.oe2403sp3.x86_64.rpm",
        "qemu-user-8.2.0-94.oe2403sp3.x86_64.rpm",
        "qemu-user-binfmt-8.2.0-94.oe2403sp3.x86_64.rpm",
        "qemu-user-static-8.2.0-94.oe2403sp3.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-4586.json"