PoC Index85,100 CVEs with PoCs

CVE-2019-15791

Reference count underflow in shiftfs

HIGH 7.8EPSS 1.3%

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.

Affected
Ubuntu · Shiftfs in the Linux kernel
CVSS v3.1 NVD
7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v3.1 UBUNTU
7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
CVSS v2.0 NVD
4.6 MEDIUMAV:L/AC:L/Au:N/C:P/I:P/A:P
EPSS
1.32% chance of exploitation in the next 30 days, 70th percentile
Published
2020-04-23
Updated
2024-09-17

ExploitDB entries (1)

Security advisories

References