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Fencer Vulns
high 7.5

CVE-2019-19768 json

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 t…

published 2019-12-12 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-9368

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.2%
EPSS 4.2% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

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).

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 5.5.13-1

debian advisories DEBIAN-CVE-2019-19768

  • linux Ubuntu 16.04 LTS 4.4.0-178.208
  • linux Ubuntu 18.04 LTS 4.15.0-99.100
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1106.117
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1066.70
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1061.65
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-99.100~16.04.1
  • linux-hwe Ubuntu 18.04 LTS 5.3.0-51.44~18.04.2
  • linux-kvm Ubuntu 16.04 LTS 4.4.0-1070.77

ubuntu advisories UBUNTU-CVE-2019-19768

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-alt RHEL 7 4.14.0-115.21.2.el7a
  • perf RHEL 7 4.14.0-115.21.2.el7a
  • kernel RHEL 7 4.14.0-115.21.2.el7a
  • python-perf RHEL 7 4.14.0-115.21.2.el7a
  • kernel-tools RHEL 7 4.14.0-115.21.2.el7a
  • kernel-tools-libs RHEL 7 4.14.0-115.21.2.el7a
  • kernel-bootwrapper RHEL 7 4.14.0-115.21.2.el7a
  • kernel-abi-whitelists RHEL 7 4.14.0-115.21.2.el7a

red hat advisories RHSA-2020:2104RHSA-2020:2199RHSA-2020:1567RHSA-2020:1769RHSA-2020:2519RHSA-2020:2522

  • kernel-syms SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.12.14-150.52.1
  • kernel-source SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.12.14-150.52.1
  • kernel-default SLES for SAP 15, SLES 15-LTSS, SLE Live Patching 15 +3 more 4.12.14-150.52.1
  • kernel-vanilla SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.12.14-150.52.1
  • kernel-obs-build SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.12.14-150.52.1
  • kernel-syms SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +1 more 4.4.121-92.129.1
  • kernel-source SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +1 more 4.4.121-92.129.1
  • kernel-default SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 4.4.121-92.129.1

suse advisories SUSE-SU-2020:1663-1SUSE-SU-2020:1255-1SUSE-SU-2020:1275-1SUSE-SU-2020:14354-1SUSE-SU-2020:1142-1SUSE-SU-2020:1141-1

  • kernel-syms openSUSE Leap 15.1 4.12.14-lp151.28.44.1
  • kernel-obs-qa openSUSE Leap 15.1 4.12.14-lp151.28.44.1
  • kernel-source openSUSE Leap 15.1 4.12.14-lp151.28.44.1
  • kernel-default openSUSE Leap 15.1 4.12.14-lp151.28.44.1
  • kernel-vanilla openSUSE Leap 15.1 4.12.14-lp151.28.44.1
  • kernel-kvmsmall openSUSE Leap 15.1 4.12.14-lp151.28.44.1
  • kernel-obs-build openSUSE Leap 15.1 4.12.14-lp151.28.44.1

opensuse advisories openSUSE-SU-2020:0388-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-19768 updated cvss 6.7

kernel: use-after-free in __blk_add_trace in kernel/trace/blktrace.c

  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    affected: no fix available
  • Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-193.el8, kernel-debuginfo-common-aarch64 4.18.0-193.el8, kernel-debuginfo-common-ppc64le 4.18.0-193.el8
    fixed: vendor fix RHSA-2020:1769
  • Red Hat CodeReady Linux Builder EUS (v. 8.1) kernel-debuginfo-common-x86_64 4.18.0-147.13.2.el8_1, kernel-debuginfo-common-aarch64 4.18.0-147.13.2.el8_1, kernel-debuginfo-common-ppc64le 4.18.0-147.13.2.el8_1
    fixed: vendor fix RHSA-2020:2199
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-193.el8, kernel 4.18.0-193.el8, bpftool 4.18.0-193.el8, kernel-core 4.18.0-193.el8, kernel-tools 4.18.0-193.el8, python3-perf 4.18.0-193.el8, +15 more
    fixed: vendor fix RHSA-2020:1769
  • Red Hat Enterprise Linux BaseOS E4S (v. 8.0) perf 4.18.0-80.18.1.el8_0, kernel 4.18.0-80.18.1.el8_0, bpftool 4.18.0-80.18.1.el8_0, kernel-core 4.18.0-80.18.1.el8_0, kernel-tools 4.18.0-80.18.1.el8_0, python3-perf 4.18.0-80.18.1.el8_0, +9 more
    fixed: vendor fix RHSA-2020:1966
  • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) perf 4.18.0-147.13.2.el8_1, kernel 4.18.0-147.13.2.el8_1, bpftool 4.18.0-147.13.2.el8_1, kpatch-patch-4_18_0-147 1-13.el8, kernel-core 4.18.0-147.13.2.el8_1, kernel-tools 4.18.0-147.13.2.el8_1, +21 more
    fixed: vendor fix RHSA-2020:2199
  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-1127.8.2.el7, kernel 3.10.0-1127.8.2.el7, bpftool 3.10.0-1127.8.2.el7, python-perf 3.10.0-1127.8.2.el7, kernel-tools 3.10.0-1127.8.2.el7, kernel-tools-libs 3.10.0-1127.8.2.el7, +2 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1127.8.2.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-1127.8.2.el7, kernel 3.10.0-1127.8.2.el7, bpftool 3.10.0-1127.8.2.el7, python-perf 3.10.0-1127.8.2.el7, kernel-tools 3.10.0-1127.8.2.el7, kernel-tools-libs 3.10.0-1127.8.2.el7, +2 more
    fixed: vendor fix RHSA-2020:2082
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) perf 3.10.0-957.54.1.el7, kernel 3.10.0-957.54.1.el7, bpftool 3.10.0-957.54.1.el7, python-perf 3.10.0-957.54.1.el7, kernel-tools 3.10.0-957.54.1.el7, kernel-tools-libs 3.10.0-957.54.1.el7, +2 more
    fixed: vendor fix RHSA-2020:2289
show 27 more
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) perf 3.10.0-1062.26.1.el7, kernel 3.10.0-1062.26.1.el7, bpftool 3.10.0-1062.26.1.el7, python-perf 3.10.0-1062.26.1.el7, kernel-tools 3.10.0-1062.26.1.el7, kernel-tools-libs 3.10.0-1062.26.1.el7, +2 more
    fixed: vendor fix RHSA-2020:2522
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1127.8.2.el7
    fixed: vendor fix RHSA-2020:2082
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) kernel-debuginfo-common-x86_64 3.10.0-957.54.1.el7
    fixed: vendor fix RHSA-2020:2289
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) kernel-debuginfo-common-x86_64 3.10.0-1062.26.1.el7
    fixed: vendor fix RHSA-2020:2522
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) perf 4.14.0-115.21.2.el7a, kernel 4.14.0-115.21.2.el7a, kernel-alt 4.14.0-115.21.2.el7a, python-perf 4.14.0-115.21.2.el7a, kernel-tools 4.14.0-115.21.2.el7a, kernel-tools-libs 4.14.0-115.21.2.el7a, +3 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) kernel-debuginfo-common-ppc64le 4.14.0-115.21.2.el7a
    fixed: vendor fix RHSA-2020:2104
  • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-1127.8.2.rt56.1103.el7, kernel-rt-kvm 3.10.0-1127.8.2.rt56.1103.el7, kernel-rt-trace 3.10.0-1127.8.2.rt56.1103.el7, kernel-rt-debug-kvm 3.10.0-1127.8.2.rt56.1103.el7, kernel-rt-trace-kvm 3.10.0-1127.8.2.rt56.1103.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1127.8.2.rt56.1103.el7
    fixed: vendor fix RHSA-2020:2085
  • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt 4.18.0-193.rt13.51.el8, kernel-rt-core 4.18.0-193.rt13.51.el8, kernel-rt-modules 4.18.0-193.rt13.51.el8, kernel-rt-debug-core 4.18.0-193.rt13.51.el8, kernel-rt-debug-modules 4.18.0-193.rt13.51.el8, kernel-rt-modules-extra 4.18.0-193.rt13.51.el8, +2 more Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-193.rt13.51.el8, kernel-rt-kvm 4.18.0-193.rt13.51.el8, kernel-rt-core 4.18.0-193.rt13.51.el8, kernel-rt-modules 4.18.0-193.rt13.51.el8, kernel-rt-debug-kvm 4.18.0-193.rt13.51.el8, kernel-rt-debug-core 4.18.0-193.rt13.51.el8, +4 more
    fixed: vendor fix RHSA-2020:1567
  • Red Hat Enterprise Linux Realtime (v. 7) kernel-rt 3.10.0-1127.8.2.rt56.1103.el7, kernel-rt-trace 3.10.0-1127.8.2.rt56.1103.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1127.8.2.rt56.1103.el7
    fixed: vendor fix RHSA-2020:2085
  • Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-1127.8.2.el7, kernel 3.10.0-1127.8.2.el7, bpftool 3.10.0-1127.8.2.el7, python-perf 3.10.0-1127.8.2.el7, kernel-kdump 3.10.0-1127.8.2.el7, kernel-tools 3.10.0-1127.8.2.el7, +7 more
    fixed: vendor fix RHSA-2020:2082
  • Red Hat Enterprise Linux Server AUS (v. 7.2) perf 3.10.0-327.88.1.el7, kernel 3.10.0-327.88.1.el7, python-perf 3.10.0-327.88.1.el7, kernel-tools 3.10.0-327.88.1.el7, kernel-tools-libs 3.10.0-327.88.1.el7, kernel-abi-whitelists 3.10.0-327.88.1.el7, +1 more
    fixed: vendor fix RHSA-2020:2285
  • Red Hat Enterprise Linux Server AUS (v. 7.3) perf 3.10.0-514.76.1.el7, kernel 3.10.0-514.76.1.el7, python-perf 3.10.0-514.76.1.el7, kernel-tools 3.10.0-514.76.1.el7, kernel-tools-libs 3.10.0-514.76.1.el7, kernel-abi-whitelists 3.10.0-514.76.1.el7, +1 more
    fixed: vendor fix RHSA-2020:2277
  • Red Hat Enterprise Linux Server AUS (v. 7.4) perf 3.10.0-693.67.1.el7, kernel 3.10.0-693.67.1.el7, python-perf 3.10.0-693.67.1.el7, kernel-tools 3.10.0-693.67.1.el7, kernel-tools-libs 3.10.0-693.67.1.el7, kernel-abi-whitelists 3.10.0-693.67.1.el7, +1 more
    fixed: vendor fix RHSA-2020:2214
  • Red Hat Enterprise Linux Server E4S (v. 7.3) perf 3.10.0-514.76.1.el7, kernel 3.10.0-514.76.1.el7, python-perf 3.10.0-514.76.1.el7, kernel-tools 3.10.0-514.76.1.el7, kernel-tools-libs 3.10.0-514.76.1.el7, kernel-bootwrapper 3.10.0-514.76.1.el7, +3 more
    fixed: vendor fix RHSA-2020:2277
  • Red Hat Enterprise Linux Server E4S (v. 7.4) perf 3.10.0-693.67.1.el7, kernel 3.10.0-693.67.1.el7, python-perf 3.10.0-693.67.1.el7, kernel-tools 3.10.0-693.67.1.el7, kernel-tools-libs 3.10.0-693.67.1.el7, kernel-bootwrapper 3.10.0-693.67.1.el7, +3 more
    fixed: vendor fix RHSA-2020:2214
  • Red Hat Enterprise Linux Server EUS (v. 7.6) perf 3.10.0-957.54.1.el7, kernel 3.10.0-957.54.1.el7, bpftool 3.10.0-957.54.1.el7, python-perf 3.10.0-957.54.1.el7, kernel-kdump 3.10.0-957.54.1.el7, kernel-tools 3.10.0-957.54.1.el7, +16 more
    fixed: vendor fix RHSA-2020:2289
  • Red Hat Enterprise Linux Server EUS (v. 7.7) perf 3.10.0-1062.26.1.el7, kernel 3.10.0-1062.26.1.el7, bpftool 3.10.0-1062.26.1.el7, python-perf 3.10.0-1062.26.1.el7, kernel-kdump 3.10.0-1062.26.1.el7, kernel-tools 3.10.0-1062.26.1.el7, +18 more
    fixed: vendor fix RHSA-2020:2522
  • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-1127.8.2.el7, kernel-debuginfo-common-x86_64 3.10.0-1127.8.2.el7, kernel-debuginfo-common-ppc64le 3.10.0-1127.8.2.el7
    fixed: vendor fix RHSA-2020:2082
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.2) kernel-debuginfo-common-x86_64 3.10.0-327.88.1.el7
    fixed: vendor fix RHSA-2020:2285
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.3) kernel-debuginfo-common-x86_64 3.10.0-514.76.1.el7
    fixed: vendor fix RHSA-2020:2277
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.67.1.el7
    fixed: vendor fix RHSA-2020:2214
  • Red Hat Enterprise Linux Server Optional E4S (v. 7.3) kernel-debuginfo-common-x86_64 3.10.0-514.76.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-514.76.1.el7
    fixed: vendor fix RHSA-2020:2277
  • Red Hat Enterprise Linux Server Optional E4S (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.67.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-693.67.1.el7
    fixed: vendor fix RHSA-2020:2214
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.6) kernel-debuginfo-common-ppc64 3.10.0-957.54.1.el7, kernel-debuginfo-common-x86_64 3.10.0-957.54.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-957.54.1.el7
    fixed: vendor fix RHSA-2020:2289
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.7) kernel-debuginfo-common-ppc64 3.10.0-1062.26.1.el7, kernel-debuginfo-common-x86_64 3.10.0-1062.26.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-1062.26.1.el7
    fixed: vendor fix RHSA-2020:2522
  • Red Hat Enterprise Linux Server Optional TUS (v. 7.3) kernel-debuginfo-common-x86_64 3.10.0-514.76.1.el7
    fixed: vendor fix RHSA-2020:2277
  • Red Hat Enterprise Linux Server Optional TUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.67.1.el7
    fixed: vendor fix RHSA-2020:2214
  • Red Hat Enterprise Linux Server TUS (v. 7.3) perf 3.10.0-514.76.1.el7, kernel 3.10.0-514.76.1.el7, python-perf 3.10.0-514.76.1.el7, kernel-tools 3.10.0-514.76.1.el7, kernel-tools-libs 3.10.0-514.76.1.el7, kernel-abi-whitelists 3.10.0-514.76.1.el7, +1 more
    fixed: vendor fix RHSA-2020:2277

5 more fixed in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.15% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.