7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
7.1 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
0.0005 Low
EPSS
Percentile
17.2%
Overlayfs in the Linux kernel and shiftfs, a non-upstream patch to the
Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, both replace
vma->vm_file in their mmap handlers. On error the original value is not
restored, and the reference is put for the file to which vm_file points. On
upstream kernels this is not an issue, as no callers dereference vm_file
following after call_mmap() returns an error. However, the aufs patchs
change mmap_region() to replace the fput() using a local variable with
vma_fput(), which will fput() vm_file, leading to a refcount underflow.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 19.04 | noarch | linux | < 5.0.0-37.40 | UNKNOWN |
ubuntu | 19.10 | noarch | linux | < 5.3.0-24.26 | UNKNOWN |
ubuntu | 19.04 | noarch | linux-aws | < 5.0.0-1022.25 | UNKNOWN |
ubuntu | 19.10 | noarch | linux-aws | < 5.3.0-1008.9 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws-5.0 | < 5.0.0-1022.25~18.04.1 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-azure | < 5.0.0-1027.29~18.04.1 | UNKNOWN |
ubuntu | 19.04 | noarch | linux-azure | < 5.0.0-1027.29 | UNKNOWN |
ubuntu | 19.10 | noarch | linux-azure | < 5.3.0-1008.9 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-azure-5.3 | < 5.3.0-1008.9~18.04.1 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-gcp | < 5.0.0-1026.27~18.04.1 | UNKNOWN |
7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
7.1 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
0.0005 Low
EPSS
Percentile
17.2%