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GoogleOSV:USN-4915-1HistoryApr 15, 2021 - 10:22 p.m.
linux-oem-5.6 vulnerabilities
2021-04-1522:22:20
Google
osv.dev
14
linux kernel
vulnerabilities
overlayfs
shiftfs
security
local attacker
elevated privileges
denial of service
memory exhaustion
arbitrary code
It was discovered that the overlayfs implementation in the Linux kernel did
not properly validate the application of file system capabilities with
respect to user namespaces. A local attacker could use this to gain
elevated privileges. (CVE-2021-3493)
Vincent Dehors discovered that the shiftfs file system in the Ubuntu Linux
kernel did not properly handle faults in copy_from_user() when passing
through ioctls to an underlying file system. A local attacker could use
this to cause a denial of service (memory exhaustion) or execute arbitrary
code. (CVE-2021-3492)
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