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Fencer Vulns
low 3.3

CVE-2022-47952 json

lxc-user-nic in lxc through 5.0.1 is installed setuid root, and may allow local users to infer whether any file exists, even within a prote…

published 2023-01-01 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-50682

cvss
3.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits
0
none known

Summary

lxc-user-nic in lxc through 5.0.1 is installed setuid root, and may allow local users to infer whether any file exists, even within a protected directory tree, because "Failed to open" often indicates that a file does not exist, whereas "does not refer to a network namespace path" often indicates that a file exists. NOTE: this is different from CVE-2018-6556 because the CVE-2018-6556 fix design was based on the premise that "we will report back to the user that the open() failed but the user has no way of knowing why it failed"; however, in many realistic cases, there are no plausible reasons for failing except that the file does not exist.

Patch / fix

  • lxc Debian 14, Debian 13, Debian 12 1:5.0.2-1

debian advisories DEBIAN-CVE-2022-47952

  • lxc Ubuntu Pro 18.04 LTS 3.0.3-0ubuntu1~18.04.3+esm1
  • lxc Ubuntu Pro 20.04 LTS 1:4.0.12-0ubuntu1~20.04.1+esm1
  • lxc Ubuntu Pro 22.04 LTS 1:5.0.0~git2209-g5a7b9ce67-0ubuntu1.1+esm1
  • lxc Ubuntu Pro 24.04 LTS 1:5.0.3-2ubuntu7.3+esm1

ubuntu advisories UBUNTU-CVE-2022-47952

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • lxc Package Hub 15 SP6, Package Hub 15 SP5, openSUSE Leap 15.6 +1 more 6.0.2-bp156.2.3.1
  • lxc openSUSE Tumbleweed 5.0.2-1.1

opensuse advisories openSUSE-SU-2024:0342-1openSUSE-SU-2024:12935-1

  • lxc Alpine 3.14 4.0.10-r2
  • lxc Alpine 3.16, Alpine 3.15 4.0.12-r2
  • lxc Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 5.0.1-r2

alpine advisories ALPINE-CVE-2022-47952

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2022-47952 updated

lxc: information disclosure vulnerability

  • Red Hat All currently supported Red Hat products
    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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

0.72% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD 3.1 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CNA 3.1 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Classification

Weakness

References

Sources

Fencer Vulns 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.