CVE-2019-15791 (GCVE-0-2019-15791)
Vulnerability from cvelistv5
Published
2020-04-23 23:55
Modified
2024-09-17 00:11
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
CWE
  • CWE-672 - Operation on a Resource after Expiration or Release
Summary
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.
References
Impacted products
Vendor Product Version
Ubuntu Shiftfs in the Linux kernel Version: 5.3.0-11.12   < 5.3 kernel*
Version: 5.0 kernel   < 5.0.0-35.38
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