What’s Vulnerable › Vulnerabilities

CVE-2019-19768

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-12-12 · updated 2026-06-17
• Weakness: CWE-416

Description

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).

Affected products

• Linux kernel: 5.4.0, 5.4.0-rc1, 5.4.0-rc2

References

• http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00039.html
• https://bugzilla.kernel.org/show_bug.cgi?id=205711
• https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
• https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
• https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
• https://security.netapp.com/advisory/ntap-20200103-0001/
• https://usn.ubuntu.com/4342-1/
• https://usn.ubuntu.com/4344-1/
• https://usn.ubuntu.com/4345-1/
• https://usn.ubuntu.com/4346-1/
• https://www.debian.org/security/2020/dsa-4698
• http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00039.html

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