CVE-2022-47952
lowpriority · track · 23EPSS 0.007 · 54 %ileexploit · PoCEURUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
exploits (1)
Public proof-of-concept and weaponised exploit code.
- MaherAzzouzi/CVE-2022-47952LXC Information Disclosure vulnerability.PoC · poc_in_github
affected products (5)
Products and version ranges known to be affected.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (18)
External citations — patches, advisories, analysis.
- https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591/comments/45cnnvd
- https://cxsecurity.com/cveshow/CVE-2022-47952/cnnvd
- https://github.com/MaherAzzouzi/CVE-2022-47952cnnvd
- https://github.com/lxc/lxc/Patchcnnvd
- https://github.com/lxc/lxc/blob/0b83d71c2c8f3bac9503f894cd84584f79258bb3/lxc.spec.in#L274cnnvd
- https://github.com/lxc/lxc/blob/0b83d71c2c8f3bac9503f894cd84584f79258bb3/src/lxc/cmd/lxc_user_nic.c#L1085-L1104cnnvd
- https://lists.debian.org/debian-lts-announce/2023/08/msg00025.htmlcnnvd
- https://www.auscert.org.au/bulletins/ESB-2023.4791cnnvd
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