Tracker / CVE-2019-15793
CVE-2019-15793
Medium 6.5
In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, several locations which shift ids translate user/group ids before performing operations in the lower filesystem were translating them into init_user_ns, whereas they should have been translated into the s_user_ns for the lower filesystem. This resulted in using ids other than the intended ones in the lower fs, which likely did not map into the shifts s_user_ns. A local attacker could use this to possibly bypass discretionary access control permissions.
Affected products and versions
| canonical | ubuntu_linux |
|---|---|
| linux | linux_kernel |
Analysis
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