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Fencer Vulns
high 8.2

CVE-2023-2008 json

Kernel: udmabuf: improper validation of array index leading to local privilege escalation

published 2023-04-14 3 y ago modified 2026-08-10 2 mo ago also EUVD-2023-33538

cvss
8.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits
0
none known

Summary

A flaw was found in the Linux kernel's udmabuf device driver, within a fault handler. This issue occurs due to the lack of proper validation of user-supplied data, which can result in memory access past the end of an array. This may allow an attacker to escalate privileges and execute arbitrary code in the context of the kernel.

Patch / fix

  • Linux kernel 5.4.202, 5.10.127, 5.15.51, 5.18.8, 5.19
  • Red Hat Red Hat Enterprise Linux 9 0:5.14.0-162.6.1.el9_1, 0:5.14.0-162.6.1.rt21.168.el9_1
  • Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support 0:5.14.0-70.58.1.el9_0, 0:5.14.0-70.58.1.rt21.129.el9_0
  • linux Debian 14, Debian 13, Debian 12 5.18.14-1

debian advisories DEBIAN-CVE-2023-2008

  • linux Ubuntu 20.04 LTS 5.4.0-126.142
  • linux Ubuntu 22.04 LTS 5.15.0-48.54
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1085.92
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1020.24
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1089.97
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1018.24
  • linux-gke Ubuntu 20.04 LTS 5.4.0-1083.89
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1016.19

ubuntu advisories UBUNTU-CVE-2023-2008

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 9 5.14.0-162.6.1.el9_1
  • perf RHEL 9 5.14.0-162.6.1.el9_1
  • bpftool RHEL 9 5.14.0-162.6.1.el9_1
  • kernel-core RHEL 9 5.14.0-162.6.1.el9_1
  • kernel-tools RHEL 9 5.14.0-162.6.1.el9_1
  • python3-perf RHEL 9 5.14.0-162.6.1.el9_1
  • kernel-modules RHEL 9 5.14.0-162.6.1.el9_1
  • kernel-zfcpdump RHEL 9 5.14.0-162.6.1.el9_1

red hat advisories RHSA-2022:8267RHSA-2022:7933RHSA-2023:3490RHSA-2023:3465RHSA-2023:3470

  • kernel-rt SLE Micro 5.4, SLE Micro 5.3, Real Time Module 15 SP4 +2 more 5.14.21-150400.15.28.2
  • kernel-syms-rt Real Time Module 15 SP4, openSUSE Leap 15.4 5.14.21-150400.15.28.1
  • kernel-rt_debug Real Time Module 15 SP4, openSUSE Leap 15.4 5.14.21-150400.15.28.2
  • kernel-source-rt Real Time Module 15 SP4, openSUSE Leap 15.4 5.14.21-150400.15.28.1
  • dtb-aarch64 openSUSE Leap 15.4 5.3.18-150300.59.121.1
  • kernel-64kb SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS, SLE High Performance Computing 15 SP3-ESPOS +1 more 5.3.18-150300.59.121.2
  • kernel-syms SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE Real Time 15 SP3 +3 more 5.3.18-150300.59.121.1
  • kernel-source SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE Real Time 15 SP3 +5 more 5.3.18-150300.59.121.2

suse advisories SUSE-SU-2023:2231-1SUSE-SU-2023:2148-1SUSE-SU-2023:2147-1SUSE-SU-2023:2146-1SUSE-SU-2023:2141-1SUSE-SU-2023:2140-1

  • kernel CBL-Mariner 2.0 5.15.111.1-1

azure linux advisories AZL-26280

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-2023-2008 updated cvss 8.2

kernel: udmabuf: improper validation of array index leading to local privilege escalation

  • Red Hat CodeReady Linux Builder (v. 9) kernel-debuginfo-common-s390x 5.14.0-162.6.1.el9_1, kernel-debuginfo-common-x86_64 5.14.0-162.6.1.el9_1, kernel-debuginfo-common-aarch64 5.14.0-162.6.1.el9_1, kernel-debuginfo-common-ppc64le 5.14.0-162.6.1.el9_1
    fixed: vendor fix RHSA-2022:8267
  • Red Hat CodeReady Linux Builder EUS (v.9.0) kernel-debuginfo-common-s390x 5.14.0-70.58.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.58.1.el9_0, kernel-debuginfo-common-aarch64 5.14.0-70.58.1.el9_0, kernel-debuginfo-common-ppc64le 5.14.0-70.58.1.el9_0
    fixed: vendor fix RHSA-2023:3465
  • Red Hat Enterprise Linux AppStream (v. 9) perf 5.14.0-162.6.1.el9_1, kernel-devel-matched 5.14.0-162.6.1.el9_1, kernel-debug-devel-matched 5.14.0-162.6.1.el9_1, kernel-debuginfo-common-s390x 5.14.0-162.6.1.el9_1, kernel-zfcpdump-devel-matched 5.14.0-162.6.1.el9_1, kernel-debuginfo-common-x86_64 5.14.0-162.6.1.el9_1, +2 more
    fixed: vendor fix RHSA-2022:8267
  • Red Hat Enterprise Linux AppStream EUS (v.9.0) perf 5.14.0-70.58.1.el9_0, kernel-devel-matched 5.14.0-70.58.1.el9_0, kernel-debug-devel-matched 5.14.0-70.58.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.58.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.58.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.58.1.el9_0, +2 more
    fixed: vendor fix RHSA-2023:3465
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-162.6.1.el9_1, bpftool 5.14.0-162.6.1.el9_1, kernel-core 5.14.0-162.6.1.el9_1, kernel-tools 5.14.0-162.6.1.el9_1, python3-perf 5.14.0-162.6.1.el9_1, kernel-modules 5.14.0-162.6.1.el9_1, +14 more
    fixed: vendor fix RHSA-2022:8267
  • Red Hat Enterprise Linux BaseOS EUS (v.9.0) kernel 5.14.0-70.58.1.el9_0, bpftool 5.14.0-70.58.1.el9_0, kernel-core 5.14.0-70.58.1.el9_0, kernel-tools 5.14.0-70.58.1.el9_0, python3-perf 5.14.0-70.58.1.el9_0, kernel-modules 5.14.0-70.58.1.el9_0, +20 more
    fixed: vendor fix RHSA-2023:3465
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-core 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-modules 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-debug-core 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-debug-modules 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-modules-extra 5.14.0-162.6.1.rt21.168.el9_1, +2 more
    fixed: vendor fix RHSA-2022:7933
  • Red Hat Enterprise Linux Real Time EUS (v.9.0) kernel-rt 5.14.0-70.58.1.rt21.129.el9_0, kernel-rt-core 5.14.0-70.58.1.rt21.129.el9_0, kernel-rt-modules 5.14.0-70.58.1.rt21.129.el9_0, kernel-rt-debug-core 5.14.0-70.58.1.rt21.129.el9_0, kernel-rt-debug-modules 5.14.0-70.58.1.rt21.129.el9_0, kernel-rt-modules-extra 5.14.0-70.58.1.rt21.129.el9_0, +2 more
    fixed: vendor fix RHSA-2023:3470
show 3 more
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-kvm 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-core 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-modules 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-debug-kvm 5.14.0-162.6.1.rt21.168.el9_1, kernel-rt-debug-core 5.14.0-162.6.1.rt21.168.el9_1, +4 more
    fixed: vendor fix RHSA-2022:7933
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0) kernel-rt 5.14.0-70.58.1.rt21.129.el9_0, kernel-rt-kvm 5.14.0-70.58.1.rt21.129.el9_0, kernel-rt-core 5.14.0-70.58.1.rt21.129.el9_0, kernel-rt-modules 5.14.0-70.58.1.rt21.129.el9_0, kernel-rt-debug-kvm 5.14.0-70.58.1.rt21.129.el9_0, kernel-rt-debug-core 5.14.0-70.58.1.rt21.129.el9_0, +4 more
    fixed: vendor fix RHSA-2023:3470
  • 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 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more
    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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
18 mo ago

Exploit prediction

1.01% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.2 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CISA ADP 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.2 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux kernel
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8

Classification

Weakness
  • CWE-129 Improper Validation of Array Index
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.