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Fencer Vulns
high 7.8

CVE-2019-19807 json

In the Linux kernel before 5.3.11, sound/core/timer.c has a use-after-free caused by erroneous code refactoring, aka CID-e7af6307a8a5.

published 2019-12-15 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-9405

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 46%
public exploits
0
none known

Summary

In the Linux kernel before 5.3.11, sound/core/timer.c has a use-after-free caused by erroneous code refactoring, aka CID-e7af6307a8a5. This is related to snd_timer_open and snd_timer_close_locked. The timeri variable was originally intended to be for a newly created timer instance, but was used for a different purpose after refactoring.

Patch / fix

  • linux linux_kernel 4.9.201, 4.14.154, 4.19.84, 5.3.11
  • linux Debian 14, Debian 13, Debian 12 5.3.15-1

debian advisories DEBIAN-CVE-2019-19807

  • linux Ubuntu 18.04 LTS 4.15.0-74.84
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1057.59
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1052.56
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-74.83~16.04.1
  • linux-kvm Ubuntu 18.04 LTS 4.15.0-1052.52
  • linux-oem Ubuntu 18.04 LTS 4.15.0-1066.76
  • linux-azure Ubuntu 16.04 LTS 4.15.0-1066.71
  • linux-oracle Ubuntu 16.04 LTS 4.15.0-1031.34~16.04.1

ubuntu advisories UBUNTU-CVE-2019-19807

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 RHEL 7 3.10.0-1160.el7
  • perf RHEL 7 3.10.0-1160.el7
  • bpftool RHEL 7 3.10.0-1160.el7
  • python-perf RHEL 7 3.10.0-1160.el7
  • kernel-kdump RHEL 7 3.10.0-1160.el7
  • kernel-tools RHEL 7 3.10.0-1160.el7
  • kernel-tools-libs RHEL 7 3.10.0-1160.el7
  • kernel-bootwrapper RHEL 7 3.10.0-1160.el7

red hat advisories RHSA-2020:4060RHSA-2020:4062RHSA-2020:3222RHSA-2020:3016RHSA-2020:3010

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-2019-19807 updated cvss 7.8

kernel: use-after-free in sound/core/timer.c

  • Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-193.13.2.el8_2, kernel-debuginfo-common-aarch64 4.18.0-193.13.2.el8_2, kernel-debuginfo-common-ppc64le 4.18.0-193.13.2.el8_2
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2020:3010
  • Red Hat CodeReady Linux Builder EUS (v. 8.1) kernel-debuginfo-common-x86_64 4.18.0-147.24.2.el8_1, kernel-debuginfo-common-aarch64 4.18.0-147.24.2.el8_1, kernel-debuginfo-common-ppc64le 4.18.0-147.24.2.el8_1
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2020:3222
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-193.13.2.el8_2, kernel 4.18.0-193.13.2.el8_2, bpftool 4.18.0-193.13.2.el8_2, kernel-core 4.18.0-193.13.2.el8_2, kernel-tools 4.18.0-193.13.2.el8_2, python3-perf 4.18.0-193.13.2.el8_2, +15 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2020:3010
  • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) perf 4.18.0-147.24.2.el8_1, kernel 4.18.0-147.24.2.el8_1, bpftool 4.18.0-147.24.2.el8_1, kernel-core 4.18.0-147.24.2.el8_1, kernel-tools 4.18.0-147.24.2.el8_1, python3-perf 4.18.0-147.24.2.el8_1, +15 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2020:3222
  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-1160.el7, kernel 3.10.0-1160.el7, bpftool 3.10.0-1160.el7, python-perf 3.10.0-1160.el7, kernel-tools 3.10.0-1160.el7, kernel-tools-libs 3.10.0-1160.el7, +2 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-1160.el7, kernel 3.10.0-1160.el7, bpftool 3.10.0-1160.el7, python-perf 3.10.0-1160.el7, kernel-tools 3.10.0-1160.el7, kernel-tools-libs 3.10.0-1160.el7, +2 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.el7
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2020:4060
  • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt 3.10.0-1160.rt56.1131.el7, kernel-rt-trace 3.10.0-1160.rt56.1131.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.rt56.1131.el7 Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-1160.rt56.1131.el7, kernel-rt-kvm 3.10.0-1160.rt56.1131.el7, kernel-rt-trace 3.10.0-1160.rt56.1131.el7, kernel-rt-debug-kvm 3.10.0-1160.rt56.1131.el7, kernel-rt-trace-kvm 3.10.0-1160.rt56.1131.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.rt56.1131.el7
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2020:4062
  • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-core 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-modules 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-debug-core 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-debug-modules 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-modules-extra 4.18.0-193.13.2.rt13.65.el8_2, +2 more Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-kvm 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-core 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-modules 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-debug-kvm 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-debug-core 4.18.0-193.13.2.rt13.65.el8_2, +4 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2020:3016
  • Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-1160.el7, kernel 3.10.0-1160.el7, bpftool 3.10.0-1160.el7, python-perf 3.10.0-1160.el7, kernel-kdump 3.10.0-1160.el7, kernel-tools 3.10.0-1160.el7, +7 more Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-1160.el7, kernel-debuginfo-common-x86_64 3.10.0-1160.el7, kernel-debuginfo-common-ppc64le 3.10.0-1160.el7 Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-1160.el7, kernel 3.10.0-1160.el7, bpftool 3.10.0-1160.el7, python-perf 3.10.0-1160.el7, kernel-tools 3.10.0-1160.el7, kernel-tools-libs 3.10.0-1160.el7, +2 more Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1160.el7
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.” RHSA-2020:4060
show 1 more
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, kernel-alt, python-perf, kernel-kdump, kernel-tools, +3 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    not affected: vulnerable code not present

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

0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • git.kernel.org https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e7af6307a8a54f0b873960b32b6a644f2d0fbd97 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

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.