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Fencer Vulns
high 7.8

CVE-2020-0444 json

In audit_free_lsm_field of auditfilter.c, there is a possible bad kfree due to a logic error in audit_data_to_entry.

published 2020-12-14 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-1945

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits
0
none known

Summary

In audit_free_lsm_field of auditfilter.c, there is a possible bad kfree due to a logic error in audit_data_to_entry. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-150693166References: Upstream kernel

Patch / fix

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

debian advisories DEBIAN-CVE-2020-0444

  • 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-kvm Ubuntu 16.04 LTS 4.4.0-1070.77
  • linux-kvm Ubuntu 18.04 LTS 4.15.0-1059.60

ubuntu advisories UBUNTU-CVE-2020-0444

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 8 4.18.0-240.el8
  • perf RHEL 8 4.18.0-240.el8
  • bpftool RHEL 8 4.18.0-240.el8
  • kernel-core RHEL 8 4.18.0-240.el8
  • kernel-tools RHEL 8 4.18.0-240.el8
  • python3-perf RHEL 8 4.18.0-240.el8
  • kernel-modules RHEL 8 4.18.0-240.el8
  • kernel-zfcpdump RHEL 8 4.18.0-240.el8

red hat advisories RHSA-2021:0763RHSA-2021:0765RHSA-2021:0774RHSA-2021:0689RHSA-2021:0686RHSA-2020:4431

  • kernel-syms SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +4 more 4.4.180-94.138.1
  • kernel-source SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +4 more 4.4.180-94.138.1
  • kernel-default SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +5 more 4.4.180-94.138.1
  • kgraft-patch-SLE12-SP3_Update_37 SLES for SAP 12 SP3, SLES 12 SP3-LTSS, OpenStack Cloud Crowbar 8 +3 more 1-4.3.1
  • kernel-syms SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.12.14-150.66.1
  • kernel-source SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.12.14-150.66.1
  • kernel-default SLES for SAP 15, SLES 15-LTSS, SLE Live Patching 15 +3 more 4.12.14-150.66.1
  • kernel-vanilla SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 4.12.14-150.66.1

suse advisories SUSE-SU-2021:0452-1SUSE-SU-2021:0438-1SUSE-SU-2021:0437-1SUSE-SU-2021:0434-1SUSE-SU-2021:0133-1SUSE-SU-2021:0118-1

  • kernel-rt openSUSE Leap 15.2 5.3.18-lp152.3.5.1
  • kernel-syms-rt openSUSE Leap 15.2 5.3.18-lp152.3.5.1
  • kernel-rt_debug openSUSE Leap 15.2 5.3.18-lp152.3.5.1
  • kernel-source-rt openSUSE Leap 15.2 5.3.18-lp152.3.5.1
  • kernel-syms openSUSE Leap 15.1 4.12.14-lp151.28.91.1
  • kernel-obs-qa openSUSE Leap 15.1 4.12.14-lp151.28.91.1
  • kernel-source openSUSE Leap 15.1 4.12.14-lp151.28.91.1
  • kernel-default openSUSE Leap 15.1 4.12.14-lp151.28.91.1

opensuse advisories openSUSE-SU-2021:0242-1openSUSE-SU-2021:0075-1openSUSE-SU-2021:0060-1

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-2020-0444 updated cvss 7.8

kernel: bad kfree in auditfilter.c may lead to escalation of privilege

  • Red Hat Enterprise Linux 5 kernel
    affected: workaround, no fix planned “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.”
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 8 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +6 more
    affected: workaround, no fix available “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.”
  • Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-240.el8, kernel-debuginfo-common-aarch64 4.18.0-240.el8, kernel-debuginfo-common-ppc64le 4.18.0-240.el8
    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-2020:4431
  • Red Hat CodeReady Linux Builder EUS (v. 8.1) kernel-debuginfo-common-x86_64 4.18.0-147.43.1.el8_1, kernel-debuginfo-common-aarch64 4.18.0-147.43.1.el8_1, kernel-debuginfo-common-ppc64le 4.18.0-147.43.1.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-2021:0686
  • Red Hat CodeReady Linux Builder EUS (v. 8.2) kernel-debuginfo-common-x86_64 4.18.0-193.46.1.el8_2, kernel-debuginfo-common-aarch64 4.18.0-193.46.1.el8_2, kernel-debuginfo-common-ppc64le 4.18.0-193.46.1.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-2021:0765
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-240.el8, kernel 4.18.0-240.el8, bpftool 4.18.0-240.el8, kernel-core 4.18.0-240.el8, kernel-tools 4.18.0-240.el8, python3-perf 4.18.0-240.el8, +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-2020:4431
  • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) kernel 4.18.0-147.43.1.el8_1, kernel-core 4.18.0-147.43.1.el8_1, kernel-modules 4.18.0-147.43.1.el8_1, kernel-zfcpdump 4.18.0-147.43.1.el8_1, kpatch-patch-4_18_0-147_13_2 1-8.el8_1, kpatch-patch-4_18_0-147_20_1 1-7.el8_1, +17 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-2021:0686
  • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) perf 4.18.0-193.46.1.el8_2, kernel 4.18.0-193.46.1.el8_2, bpftool 4.18.0-193.46.1.el8_2, kpatch-patch-4_18_0-193 1-10.el8, kernel-core 4.18.0-193.46.1.el8_2, kernel-tools 4.18.0-193.46.1.el8_2, +26 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-2021:0765
show 2 more
  • Red Hat Enterprise Linux Real Time EUS (v. 8.2) kernel-rt 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-core 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-modules 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-debug-core 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-debug-modules 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-modules-extra 4.18.0-193.46.1.rt13.96.el8_2, +2 more Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2) kernel-rt 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-kvm 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-core 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-modules 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-debug-kvm 4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-debug-core 4.18.0-193.46.1.rt13.96.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-2021:0774
  • Red Hat CodeReady Linux Builder EUS (v. 8.1) perf-debuginfo 4.18.0-147.43.1.el8_1, bpftool-debuginfo 4.18.0-147.43.1.el8_1, kernel-tools-debuginfo 4.18.0-147.43.1.el8_1, python3-perf-debuginfo 4.18.0-147.43.1.el8_1, kernel-tools-libs-devel 4.18.0-147.43.1.el8_1 Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, kernel-alt, python-perf, +9 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +82 more Red Hat Enterprise Linux BaseOS EUS (v. 8.1) perf 4.18.0-147.43.1.el8_1, bpftool 4.18.0-147.43.1.el8_1, kernel-tools 4.18.0-147.43.1.el8_1, python3-perf 4.18.0-147.43.1.el8_1, kernel-tools-libs 4.18.0-147.43.1.el8_1, kernel-abi-whitelists 4.18.0-147.43.1.el8_1 Red Hat Enterprise MRG 2 kernel
    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

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-08).

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

Affected products

  • n/a Android

Classification

Weakness
  • CWE-763 Release of Invalid Pointer or Reference

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.