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7.1 High

CVE-2019-15791 In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series,…

Description

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 products and versions

Product Affected versions Fixed in
Shiftfs in the Linux kernel 5.3 5.3.0-11.12 → latest No fix stated
Shiftfs in the Linux kernel 5.0 earliest → < 5.0.0-35.38 5.0.0-35.38

References

Timeline

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Other CVEs of Shiftfs in the Linux kernel

The 3 CVEs of Shiftfs in the Linux kernel →
CVE-2019-15792 In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series,… 7.1 High CVE-2019-15793 In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, several locations… 6.5 Medium
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