CVE-2019-19448

Priority
Description
In the Linux kernel 5.0.21 and 5.3.11, mounting a crafted btrfs filesystem
image, performing some operations, and then making a syncfs system call can
lead to a use-after-free in try_merge_free_space in
fs/btrfs/free-space-cache.c because the pointer to a left data structure
can be the same as the pointer to a right data structure.
Notes
tyhicksExploiting this vulnerability requires a crafted filesystem image to
be mounted
sbeattieit's asserted that the btrfs enhanced tree-checker should
address this issue; this was backported to at least the 4.15 kernels.
Package
Source: linux (LP Ubuntu Debian)
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Ubuntu 18.04 LTS (Bionic Beaver):ignored (was needs-triage now end-of-life)
Ubuntu 19.10 (Eoan Ermine):DNE
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Ubuntu 20.04 LTS (Focal Fossa):DNE
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Ubuntu 16.04 LTS (Xenial Xerus):needs-triage
Ubuntu 18.04 LTS (Bionic Beaver):ignored (was needs-triage now end-of-life)
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Ubuntu 18.04 LTS (Bionic Beaver):ignored (was needs-triage now end-of-life)
Ubuntu 19.10 (Eoan Ermine):DNE
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Ubuntu 18.04 LTS (Bionic Beaver):needs-triage
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 LTS (Focal Fossa):DNE
Ubuntu 20.10 (Groovy Gorilla):DNE
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Ubuntu 18.04 LTS (Bionic Beaver):needs-triage
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Ubuntu 20.04 LTS (Focal Fossa):DNE
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Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):ignored (was needs-triage now end-of-life)
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 LTS (Focal Fossa):DNE
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Ubuntu 18.04 LTS (Bionic Beaver):needs-triage
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Ubuntu 16.04 LTS (Xenial Xerus):ignored (was needs-triage now end-of-life)
Ubuntu 18.04 LTS (Bionic Beaver):ignored (was needs-triage now end-of-life)
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 LTS (Focal Fossa):DNE
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Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
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Ubuntu 20.04 LTS (Focal Fossa):DNE
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Ubuntu 12.04 ESM (Precise Pangolin):DNE
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Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
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More Information

Updated: 2020-06-06 23:14:53 UTC (commit b095ea948cb09f560ca246945c8ef6825db7ab9c)