Use After Free in Linux Kernel
CVE-2019-19770
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
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.
EPSS exploit prediction
EPSS: 0.024 (83.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 83.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.kernel.org/show_bug.cgi (Exploit, Issue Tracking, Vendor Advisory)
- security.netapp.com/advisory/ntap-20200103-0001/ (Third Party Advisory)
- lore.kernel.org/linux-block/20200402000002.7442-1-mcgrof@kernel.org/
- lists.opensuse.org/opensuse-security-announce/2020-04/msg00035.html (vendor-advisory)
- lists.debian.org/debian-lts-announce/2020/12/msg00015.html (mailing-list)
Frequently asked questions
- What is CVE-2019-19770?
- CVE-2019-19770 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 8.2/10. Published 2019-12-12.
- How severe is CVE-2019-19770?
- High severity. CVSS v3 base score is 8.2 out of 10.
- Is CVE-2019-19770 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.