Use After Free in Linux Kernel

CVE-2019-19768

In the Linux kernel 5.4.0-rc2, there is a use-after-free (read) in the __blk_add_trace function in kernel/trace/blktrace.c (which is used to fill out a blk_io_trace structure and place it in a per-cpu sub-buffer).

Vulnerability class: Use-After-Free

EPSS: 0.042 (89.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2019-19768?
CVE-2019-19768 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.5/10. Published 2019-12-12.
How severe is CVE-2019-19768?
High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2019-19768 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.