CVE-2025-38499High· 7.8▾ TwilightIn 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…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 15.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.2%
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.
linux_kernel >= 4.4.281, < 4.5linux_kernel >= 4.9.280, < 4.10linux_kernel >= 4.14.244, < 4.15linux_kernel >= 4.19.204, < 4.20linux_kernel >= 5.4.141, < 5.5linux_kernel >= 5.10.59, < 5.11linux_kernel >= 5.13.11, < 5.14linux_kernel >= 5.14.1, < 5.15.190linux_kernel >= 5.16, < 6.1.147linux_kernel >= 6.2, < 6.6.100linux_kernel >= 6.7, < 6.12.40linux_kernel >= 6.13, < 6.15.3linux_kernel = 5.14debian_linux = 11.0Upgrade past the affected range:
linux_kernel 6.15.3Connected by shared product, vendor, weakness, or advisory.
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