CVE-2019-19770

Severity: high (CVSS 8.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-12-12 · updated 2026-06-17
Weakness: CWE-416

Description

In the Linux kernel 4.19.83, there is a use-after-free (read) in the debugfs_remove function in fs/debugfs/inode.c (which is used to remove a file or directory in debugfs that was previously created with a call to another debugfs function such as debugfs_create_file). NOTE: Linux kernel developers dispute this issue as not being an issue with debugfs, instead this is an issue with misuse of debugfs within blktrace

Affected products

Linux kernel: through 4.19.83

References

http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00035.html
https://bugzilla.kernel.org/show_bug.cgi?id=205713
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
https://lore.kernel.org/linux-block/20200402000002.7442-1-mcgrof%40kernel.org/
https://security.netapp.com/advisory/ntap-20200103-0001/
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00035.html
https://bugzilla.kernel.org/show_bug.cgi?id=205713
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
https://lore.kernel.org/linux-block/20200402000002.7442-1-mcgrof%40kernel.org/
https://security.netapp.com/advisory/ntap-20200103-0001/

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