Threats Tagged 'ubuntu-cve-2025-38499'
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Threats Tagged 'ubuntu-cve-2025-38499'
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In the Linux kernel, the following vulnerability has been resolved: clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns What we want is to verify there is that clone won't expose something hidden by a mount we wouldn't be able to undo. "Wouldn't be able to undo" may be a result of MNT_LOCKED on a child, but it may also come from lacking admin rights in the userns of the namespace mount belongs to. clone_private_mnt() checks the former, but not the latter. There's a number of rather confusing CAP_SYS_ADMIN checks in various userns during the mount, especially with the new mount API; they serve different purposes and in case of clone_private_mnt() they usually, but not always end up covering the missing check mentioned above. Join the discussion | GCVE Database | 08/11/2025, 16:15:00 UTC Added: 06/25/2026, 21:47:04 UTC |
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