CVE-2019-19768: linux linux_kernel Use After Free
Vulnerability summary
CVE-2019-19768 is a high (CVSS 7.5) Use After Free vulnerability in linux linux_kernel. EPSS estimates a 4.15% chance of exploitation in the next 30 days, higher than 90.8% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 4% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 38 · Related 18Timeline
- 12-12-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
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).
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · Red hatEcosystem advisory · calculated6.7MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HDiffers
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
4.15%
Chance of exploitation in the next 30 days
Percentile
91%
Versus all other CVEs
30-day change
No change 0.00 pp
From 4.15% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu36 products
- linuxAll versions (No fix recorded) | < 4.4.0-178.208 | < 4.15.0-99.100
- linux-aws< 4.4.0-1066.70 | < 4.4.0-1106.117 | < 4.15.0-1066.70
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.3< 5.3.0-1017.18~18.04.1
- linux-aws-fips< 4.15.0-2018.18 | All versions (No fix recorded)
Redhat25 products
- bpftool< 0:4.18.0-80.18.1.el8_0
- bpftool-debuginfo< 0:4.18.0-80.18.1.el8_0
- kernel< 0:4.18.0-80.18.1.el8_0
- kernel-abi-whitelists< 0:4.18.0-80.18.1.el8_0
- kernel-core< 0:4.18.0-80.18.1.el8_0
Debian1 product
- linux< 5.5.13-1
Linux1 product
- linux_kernelEOL5.4.0 | 5.4.0:rc1 | 5.4.0:rc2
4 vendors · 63 products
References
25 links- security.netapp.com/advisory/ntap-20200103-0001/X Refsource CONFIRM
