CVE-2019-15791 (GCVE-0-2019-15791)

Vulnerability from cvelistv5 – Published: 2020-04-23 23:55 – Updated: 2024-09-17 00:11
VLAI
Title
Reference count underflow in shiftfs
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.
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
Assigner
References
Impacted products
Vendor Product Version CPE status
Ubuntu Shiftfs in the Linux kernel Affected: 5.3.0-11.12 , < 5.3 kernel* (custom)
Affected: 5.0 kernel , < 5.0.0-35.38 (custom)
guessed Create a notification for this product.
Date Public
2019-11-12 00:00
Credits
Jann Horn of Google Project Zero
Show details on NVD website
To clipboard 

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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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