lxc: lxc-user-nic in lxc through 5.0.1 is installed setuid root, and may allow local users to infer whether any file exist...
CVE-2022-47952 is fixed in 8 products on 1 platform, first by DEBIAN-CVE-2022-47952, released January 1, 2023. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| liblxc-common · Ubuntu 18.04.6 LTS (bionic) | 3.0.3-0ubuntu1~18.04.3+esm1 | liblxc-common 3.0.3-0ubuntu1~18.04.3+esm1 | May 5, 2026 |
| liblxc-common · Ubuntu 20.04 LTS (focal) | 1:4.0.12-0ubuntu1~20.04.1+esm1 | liblxc-common 1:4.0.12-0ubuntu1~20.04.1+esm1 | May 5, 2026 |
| liblxc-common · Ubuntu 22.04.1 LTS (jammy) | 1:5.0.0~git2209-g5a7b9ce67-0ubuntu1.1+esm1 | liblxc-common 1:5.0.0~git2209-g5a7b9ce67-0ubuntu1.1+esm1 | May 5, 2026 |
| liblxc-common · Ubuntu 24.04.5 LTS (noble) | 1:5.0.3-2ubuntu7.3+esm1 | liblxc-common 1:5.0.3-2ubuntu7.3+esm1 | May 5, 2026 |
| liblxc1 · Ubuntu 18.04.6 LTS (bionic) | 3.0.3-0ubuntu1~18.04.3+esm1 | liblxc1 3.0.3-0ubuntu1~18.04.3+esm1 | May 5, 2026 |
| liblxc1 · Ubuntu 20.04 LTS (focal) | 1:4.0.12-0ubuntu1~20.04.1+esm1 | liblxc1 1:4.0.12-0ubuntu1~20.04.1+esm1 | May 5, 2026 |
| liblxc1 · Ubuntu 22.04.1 LTS (jammy) | 1:5.0.0~git2209-g5a7b9ce67-0ubuntu1.1+esm1 | liblxc1 1:5.0.0~git2209-g5a7b9ce67-0ubuntu1.1+esm1 | May 5, 2026 |
| liblxc1t64 · Ubuntu 24.04.5 LTS (noble) | 1:5.0.3-2ubuntu7.3+esm1 | liblxc1t64 1:5.0.3-2ubuntu7.3+esm1 | May 5, 2026 |
| libpam-cgfs · Ubuntu 18.04.6 LTS (bionic) | 3.0.3-0ubuntu1~18.04.3+esm1 | libpam-cgfs 3.0.3-0ubuntu1~18.04.3+esm1 | May 5, 2026 |
| libpam-cgfs · Ubuntu 20.04 LTS (focal) | 1:4.0.12-0ubuntu1~20.04.1+esm1 | libpam-cgfs 1:4.0.12-0ubuntu1~20.04.1+esm1 | May 5, 2026 |
| libpam-cgfs · Ubuntu 22.04.1 LTS (jammy) | 1:5.0.0~git2209-g5a7b9ce67-0ubuntu1.1+esm1 | libpam-cgfs 1:5.0.0~git2209-g5a7b9ce67-0ubuntu1.1+esm1 | May 5, 2026 |
| libpam-cgfs · Ubuntu 24.04.5 LTS (noble) | 1:5.0.3-2ubuntu7.3+esm1 | libpam-cgfs 1:5.0.3-2ubuntu7.3+esm1 | May 5, 2026 |
| lxc · Debian 12.15 (bookworm) | 1:5.0.2-1 | DEBIAN-CVE-2022-47952 | Jan 1, 2023 |
| lxc · Debian 13.5 (trixie) | 1:5.0.2-1 | DEBIAN-CVE-2022-47952 | Jan 1, 2023 |
| lxc · Debian 14 | 1:5.0.2-1 | DEBIAN-CVE-2022-47952 | Jan 1, 2023 |
| lxc · Ubuntu 18.04.6 LTS (bionic) | 3.0.3-0ubuntu1~18.04.3+esm1 | lxc 3.0.3-0ubuntu1~18.04.3+esm1 | May 5, 2026 |
| lxc · Ubuntu 20.04 LTS (focal) | 1:4.0.12-0ubuntu1~20.04.1+esm1 | lxc 1:4.0.12-0ubuntu1~20.04.1+esm1 | May 5, 2026 |
| lxc · Ubuntu 22.04.1 LTS (jammy) | 1:5.0.0~git2209-g5a7b9ce67-0ubuntu1.1+esm1 | lxc 1:5.0.0~git2209-g5a7b9ce67-0ubuntu1.1+esm1 | May 5, 2026 |
| lxc · Ubuntu 24.04.5 LTS (noble) | 1:5.0.3-2ubuntu7.3+esm1 | lxc 1:5.0.3-2ubuntu7.3+esm1 | May 5, 2026 |
| lxc · opensuse-leap 15.6 | 6.0.2-bp156.2.3.1 | OPENSUSE-SU-2024:0342-1 | Oct 30, 2024 |
| lxc-tests · Ubuntu 24.04.5 LTS (noble) | 1:5.0.3-2ubuntu7.3+esm1 | lxc-tests 1:5.0.3-2ubuntu7.3+esm1 | May 5, 2026 |
| lxc-utils · Ubuntu 18.04.6 LTS (bionic) | 3.0.3-0ubuntu1~18.04.3+esm1 | lxc-utils 3.0.3-0ubuntu1~18.04.3+esm1 | May 5, 2026 |
| lxc-utils · Ubuntu 20.04 LTS (focal) | 1:4.0.12-0ubuntu1~20.04.1+esm1 | lxc-utils 1:4.0.12-0ubuntu1~20.04.1+esm1 | May 5, 2026 |
| lxc-utils · Ubuntu 22.04.1 LTS (jammy) | 1:5.0.0~git2209-g5a7b9ce67-0ubuntu1.1+esm1 | lxc-utils 1:5.0.0~git2209-g5a7b9ce67-0ubuntu1.1+esm1 | May 5, 2026 |
| lxc-utils · Ubuntu 24.04.5 LTS (noble) | 1:5.0.3-2ubuntu7.3+esm1 | lxc-utils 1:5.0.3-2ubuntu7.3+esm1 | May 5, 2026 |
| lxc1 · Ubuntu 18.04.6 LTS (bionic) | 3.0.3-0ubuntu1~18.04.3+esm1 | lxc1 3.0.3-0ubuntu1~18.04.3+esm1 | May 5, 2026 |
| lxc1 · Ubuntu 20.04 LTS (focal) | 1:4.0.12-0ubuntu1~20.04.1+esm1 | lxc1 1:4.0.12-0ubuntu1~20.04.1+esm1 | May 5, 2026 |
| lxc1 · Ubuntu 22.04.1 LTS (jammy) | 1:5.0.0~git2209-g5a7b9ce67-0ubuntu1.1+esm1 | lxc1 1:5.0.0~git2209-g5a7b9ce67-0ubuntu1.1+esm1 | May 5, 2026 |
| lxc1 · Ubuntu 24.04.5 LTS (noble) | 1:5.0.3-2ubuntu7.3+esm1 | lxc1 1:5.0.3-2ubuntu7.3+esm1 | May 5, 2026 |
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