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Fencer Intel
low 2.1

CVE-2011-2527 json

The change_process_uid function in os-posix.c in Qemu 0.14.0 and earlier does not properly drop group privileges when the -runas option is…

published 2012-06-21 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-2511

cvss
2.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits
0
none known

Summary

The change_process_uid function in os-posix.c in Qemu 0.14.0 and earlier does not properly drop group privileges when the -runas option is used, which allows local guest users to access restricted files on the host.

Patch / fix

  • qemu-kvm RHEL 6 2:0.12.1.2-2.209.el6
  • qemu-img RHEL 6 2:0.12.1.2-2.209.el6
  • qemu-kvm-tools RHEL 6 2:0.12.1.2-2.209.el6

red hat advisories RHSA-2011:1531

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-2527 updated cvss 3.7

qemu: when started as root, extra groups are not dropped correctly

  • Red Hat Enterprise Linux Desktop (v. 6) qemu-img 0.12.1.2-2.209.el6, qemu-kvm 0.12.1.2-2.209.el6, qemu-kvm-tools 0.12.1.2-2.209.el6 Red Hat Enterprise Linux HPC Node (v. 6) qemu-img 0.12.1.2-2.209.el6, qemu-kvm 0.12.1.2-2.209.el6, qemu-kvm-tools 0.12.1.2-2.209.el6 Red Hat Enterprise Linux Server (v. 6) qemu-img 0.12.1.2-2.209.el6, qemu-kvm 0.12.1.2-2.209.el6, qemu-kvm-tools 0.12.1.2-2.209.el6 Red Hat Enterprise Linux Workstation (v. 6) qemu-img 0.12.1.2-2.209.el6, qemu-kvm 0.12.1.2-2.209.el6, qemu-kvm-tools 0.12.1.2-2.209.el6
    fixed: vendor fix RHSA-2011:1531
  • Red Hat Enterprise Linux 5 kvm
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.