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CVE-2019-15791

CVSS v3.1 7.8 (High)
78% Progress
CVSS v2.0 4.6 (Medium)
46% Progress
EPSS 0.04 % (13th)
0.04% Progress
Affected Products 2
Advisories 2
Info CVSS EPSS Affected Configurations References Security Advisories Packages & Software OVAL Tools, Exploits & PoC Graph Web & Social Timeline

In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, shiftfs_btrfs_ioctl_fd_replace() installs an fd referencing a file from the lower filesystem without taking an additional reference to that file. After the btrfs ioctl completes this fd is closed, which then puts a reference to that file, leading to a refcount underflow.

Weaknesses
CWE-191
Integer Underflow (Wrap or Wraparound)
CWE-672
Operation on a Resource after Expiration or Release
CVE Status
PUBLISHED
CNA
Canonical Ltd.
Published Date
2020-04-24 00:15:11
(4 years ago)
Updated Date
2020-05-01 14:55:04
(4 years ago)

Affected Products

Canonical

Linux

Configuration #1

    CPE23 From Up To
  Linux Kernel 5.0 cpe:2.3:o:linux:linux_kernel:5.0
  Linux Kernel 5.3 cpe:2.3:o:linux:linux_kernel:5.3

Configuration #2

    CPE23 From Up To
  Canonical Ubuntu Linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts
  Canonical Ubuntu Linux 19.04 cpe:2.3:o:canonical:ubuntu_linux:19.04