A flaw was found in the Linux kernel's NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.
Platform | Package | Release Date | Advisory |
---|---|---|---|
Amazon Linux 1 | kernel | 2019-01-25 02:26 | ALAS-2019-1149 |
Amazon Linux 2 - Core | kernel | 2019-01-23 23:20 | ALAS2-2019-1149 |
Score Type | Score | Vector | |
---|---|---|---|
Amazon Linux | CVSSv3 | 6.5 | CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H |
NVD | CVSSv2 | 6.7 | AV:A/AC:L/Au:S/C:P/I:P/A:C |
NVD | CVSSv3 | 8.0 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |