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Fencer Vulns
high 8.4

CVE-2022-0185 kev in the critical feed json

A heap-based buffer overflow flaw was found in the way the legacy_parse_param function in the Filesystem Context functionality of the Linux…

published 2022-02-11 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-15389

cvss
8.4
version 3.1, CNA
cisa kev
Exploited
added 2024-08-21
epss
25.2%
EPSS 25.2% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

A heap-based buffer overflow flaw was found in the way the legacy_parse_param function in the Filesystem Context functionality of the Linux kernel verified the supplied parameters length. An unprivileged (in case of unprivileged user namespaces enabled, otherwise needs namespaced CAP_SYS_ADMIN privilege) local user able to open a filesystem that does not support the Filesystem Context API (and thus fallbacks to legacy handling) could use this flaw to escalate their privileges on the system.

Patch / fix

cisa required action Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

  • linux linux_kernel 5.4.173, 5.10.93, 5.15.16, 5.16.2
  • linux Debian 14, Debian 13, Debian 12 5.15.15-1

debian advisories DEBIAN-CVE-2022-0185

  • linux Ubuntu 20.04 LTS 5.4.0-96.109
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1063.66
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1062.66
  • linux-gke Ubuntu 20.04 LTS 5.4.0-1059.62
  • linux-ibm Ubuntu 20.04 LTS 5.4.0-1012.13
  • linux-kvm Ubuntu 20.04 LTS 5.4.0-1053.55
  • linux-azure Ubuntu 20.04 LTS 5.4.0-1067.70
  • linux-gkeop Ubuntu 20.04 LTS 5.4.0-1031.32

ubuntu advisories UBUNTU-CVE-2022-0185

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

  • redhat-virtualization-host rhev hypervisor 4.4 4.4.10-202202081536_8.5
  • redhat-virtualization-host-image-update rhev hypervisor 4.4 4.4.10-202202081536_8.5
  • kernel-rt RHEL 8 4.18.0-348.12.2.rt7.143.el8_5
  • kernel-rt-kvm RHEL 8 4.18.0-348.12.2.rt7.143.el8_5
  • kernel-rt-core RHEL 8 4.18.0-348.12.2.rt7.143.el8_5
  • kernel-rt-modules RHEL 8 4.18.0-348.12.2.rt7.143.el8_5
  • kernel-rt-debug-kvm RHEL 8 4.18.0-348.12.2.rt7.143.el8_5
  • kernel-rt-debug-core RHEL 8 4.18.0-348.12.2.rt7.143.el8_5

red hat advisories RHSA-2022:0540RHSA-2022:0176RHSA-2022:0232RHSA-2022:0231RHSA-2022:0188RHSA-2022:0186

  • kernel-rt SLE Micro 5.0, Real Time Module 15 SP2 5.3.18-68.1
  • kernel-syms-rt Real Time Module 15 SP2 5.3.18-68.1
  • kernel-rt_debug Real Time Module 15 SP2 5.3.18-68.1
  • kernel-source-rt Real Time Module 15 SP2 5.3.18-68.1
  • kernel-rt SLE Micro 5.1, Real Time Module 15 SP3 5.3.18-150300.71.1
  • kernel-syms-rt Real Time Module 15 SP3 5.3.18-150300.71.1
  • kernel-rt_debug Real Time Module 15 SP3 5.3.18-150300.71.1
  • kernel-source-rt Real Time Module 15 SP3 5.3.18-150300.71.1

suse advisories SUSE-SU-2022:0295-1SUSE-SU-2022:0293-1SUSE-SU-2022:0292-1SUSE-SU-2022:0291-1SUSE-SU-2022:0289-1SUSE-SU-2022:0288-1

  • kernel-source openSUSE Tumbleweed 5.16.2-1.1
  • kernel-source openSUSE Tumbleweed 6.6.17-1.1
  • dtb-aarch64 openSUSE Leap 15.3 5.3.18-150300.59.43.1
  • kernel-64kb openSUSE Leap 15.3 5.3.18-150300.59.43.1
  • kernel-syms openSUSE Leap 15.3 5.3.18-150300.59.43.1
  • kernel-obs-qa openSUSE Leap 15.3 5.3.18-150300.59.43.1
  • kernel-source openSUSE Leap 15.3 5.3.18-150300.59.43.1
  • kernel-default openSUSE Leap 15.3 5.3.18-150300.59.43.1

opensuse advisories openSUSE-SU-2024:11775-1openSUSE-SU-2024:13704-1openSUSE-SU-2022:0198-1openSUSE-SU-2022:0169-1

  • kernel Rocky Linux 8 4.18.0-348.12.2.el8_5
  • kernel-rt Rocky Linux 8 4.18.0-348.12.2.rt7.143.el8_5

rocky linux advisories RLSA-2022:0188RLSA-2022:0176

  • kernel CBL-Mariner 2.0 5.15.26.1-1

azure linux advisories AZL-8578

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2022-0185 updated cvss 7.8

kernel: fs_context: heap overflow in legacy parameter handling

  • Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-348.12.2.el8_5, kernel-debuginfo-common-aarch64 4.18.0-348.12.2.el8_5, kernel-debuginfo-common-ppc64le 4.18.0-348.12.2.el8_5 Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-348.12.2.el8_5, kernel 4.18.0-348.12.2.el8_5, bpftool 4.18.0-348.12.2.el8_5, kpatch-patch-4_18_0-348 1-2.el8, kernel-core 4.18.0-348.12.2.el8_5, kernel-tools 4.18.0-348.12.2.el8_5, +18 more
    fixed: vendor fix RHSA-2022:0188
  • Red Hat Enterprise Linux BaseOS EUS (v.8.4) perf 4.18.0-305.34.2.el8_4, kernel 4.18.0-305.34.2.el8_4, bpftool 4.18.0-305.34.2.el8_4, kpatch-patch-4_18_0-305 1-10.el8, kernel-core 4.18.0-305.34.2.el8_4, kernel-tools 4.18.0-305.34.2.el8_4, +25 more Red Hat Enterprise Linux CRB EUS (v.8.4) kernel-debuginfo-common-x86_64 4.18.0-305.34.2.el8_4, kernel-debuginfo-common-aarch64 4.18.0-305.34.2.el8_4, kernel-debuginfo-common-ppc64le 4.18.0-305.34.2.el8_4
    fixed: vendor fix RHSA-2022:0186
  • Red Hat Enterprise Linux for Real Time (v. 8) kernel-rt 4.18.0-348.12.2.rt7.143.el8_5, kernel-rt-core 4.18.0-348.12.2.rt7.143.el8_5, kernel-rt-modules 4.18.0-348.12.2.rt7.143.el8_5, kernel-rt-debug-core 4.18.0-348.12.2.rt7.143.el8_5, kernel-rt-debug-modules 4.18.0-348.12.2.rt7.143.el8_5, kernel-rt-modules-extra 4.18.0-348.12.2.rt7.143.el8_5, +2 more
    fixed: vendor fix RHSA-2022:0176
  • Red Hat Enterprise Linux NFV EUS (v.8.4) kernel-rt 4.18.0-305.34.2.rt7.107.el8_4, kernel-rt-kvm 4.18.0-305.34.2.rt7.107.el8_4, kernel-rt-core 4.18.0-305.34.2.rt7.107.el8_4, kernel-rt-modules 4.18.0-305.34.2.rt7.107.el8_4, kernel-rt-debug-kvm 4.18.0-305.34.2.rt7.107.el8_4, kernel-rt-debug-core 4.18.0-305.34.2.rt7.107.el8_4, +4 more
    fixed: vendor fix RHSA-2022:0187
  • Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-348.12.2.rt7.143.el8_5, kernel-rt-kvm 4.18.0-348.12.2.rt7.143.el8_5, kernel-rt-core 4.18.0-348.12.2.rt7.143.el8_5, kernel-rt-modules 4.18.0-348.12.2.rt7.143.el8_5, kernel-rt-debug-kvm 4.18.0-348.12.2.rt7.143.el8_5, kernel-rt-debug-core 4.18.0-348.12.2.rt7.143.el8_5, +4 more
    fixed: vendor fix RHSA-2022:0176
  • Red Hat Enterprise Linux RT EUS (v.8.4) kernel-rt 4.18.0-305.34.2.rt7.107.el8_4, kernel-rt-core 4.18.0-305.34.2.rt7.107.el8_4, kernel-rt-modules 4.18.0-305.34.2.rt7.107.el8_4, kernel-rt-debug-core 4.18.0-305.34.2.rt7.107.el8_4, kernel-rt-debug-modules 4.18.0-305.34.2.rt7.107.el8_4, kernel-rt-modules-extra 4.18.0-305.34.2.rt7.107.el8_4, +2 more
    fixed: vendor fix RHSA-2022:0187
  • Red Hat Virtualization 4 Hypervisor for RHEL 8 redhat-virtualization-host 4.4.10-202202081536_8.5, redhat-virtualization-host-image-update 4.4.10-202202081536_8.5
    fixed: vendor fix RHSA-2022:0540
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux BaseOS (v. 8) kernel-doc 4.18.0-348.12.2.el8_5 Red Hat Virtualization 4 Hypervisor for RHEL 8 wget 1.19.5-10.el8, libmetalink 0.1.3-7.el8 Red Hat RHEL 8-based RHEV-H for RHEV 4 (build requirements) redhat-release-virtualization-host 4.4.10-1.el8ev, redhat-release-virtualization-host-content 4.4.10-1.el8ev, redhat-virtualization-host-image-update-placeholder 4.4.10-1.el8ev
    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

Timeline

  1. Published
  2. Added to CISA KEV
  3. CISA SSVC: exploitation active
  4. CISA patch deadline

Known exploited

Added
2 y ago
Patch by
2024-09-11 (2 y ago)
Ransomware
Not known
Required action
Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.
Vendor, product
Linux, Kernel
CISA name
Linux Kernel Heap-Based Buffer Overflow Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

25.15% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/Crusaders-of-Rust/CVE-2022-0185 referenced PoC, tagged "exploit" by a source, unverified
  • willsroot.io https://www.willsroot.io/2022/01/cve-2022-0185.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 8.4 CVSS:3.1/AV:L/AC:L/PR:N/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 kernel
  • linux linux_kernel

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound
  • CWE-191 Integer Underflow (Wrap or Wraparound)
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.