synced 8 MIN AGO
01 Record

CVE-2023-4208

Use-after-free in Linux kernel's net/sched: cls_u32 component

HighPUBLISHEDCNA: Google
CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
View raw JSON

02 Description

Use-after-free in Linux kernel's net/sched: cls_u32 component

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.31% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 23.8% of scored records. A rank, not a probability.
NVD base score
7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2023-09-06 13:53Z3 YR AGO
Last updated
2025-02-13 17:09Z1 YR AGO
Reserved
2023-08-07
Assigning CNA
Google
Record state
PUBLISHED
Severity
High (CVSS 7.8)
CNA CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
Data version
5.1
Document digest
31ae3554101f8210b3c4a4b328f3c0959b4686b4779ad65cbf8898e18feca5b3

05 Affected products

VendorProductVersionsPlatforms
LinuxKernel3.18 to < 6.5—

06 References

07 Fixed in

AlmaLinux 8

  • bpftool
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-abi-stablelists
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-core
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-cross-headers
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug-core
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug-devel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug-modules
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug-modules-extra
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-devel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-doc
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-headers
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-modules
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-modules-extra
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-tools
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-tools-libs
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-tools-libs-devel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump-core
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump-devel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump-modules
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump-modules-extra
    Fixed in 4.18.0-513.5.1.el8_9
  • perf
    Fixed in 4.18.0-513.5.1.el8_9
  • python3-perf
    Fixed in 4.18.0-513.5.1.el8_9

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • bpftool
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-abi-stablelists
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-core
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-cross-headers
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug-core
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug-devel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug-modules
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-debug-modules-extra
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-devel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-doc
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-headers
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-modules
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-modules-extra
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-tools
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-tools-libs
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-tools-libs-devel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump-core
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump-devel
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump-modules
    Fixed in 4.18.0-513.5.1.el8_9
  • kernel-zfcpdump-modules-extra
    Fixed in 4.18.0-513.5.1.el8_9
  • perf
    Fixed in 4.18.0-513.5.1.el8_9
  • python3-perf
    Fixed in 4.18.0-513.5.1.el8_9

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • linux
    Fixed in 6.1.52-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • linux
    Fixed in 6.4.11-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • linux
    Fixed in 6.4.11-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 16.04 LTS

  • linux-hwe-edge
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • linux-aws-5.0
    No fix yet
  • linux-aws-5.3
    No fix yet
  • linux-azure
    No fix yet
  • linux-azure-5.3
    No fix yet
  • linux-azure-edge
    No fix yet
  • linux-gcp
    No fix yet
  • linux-gcp-5.3
    No fix yet
  • linux-gke-4.15
    No fix yet
  • linux-gke-5.4
    No fix yet
  • linux-gkeop-5.4
    No fix yet
  • linux-hwe
    No fix yet
  • linux-hwe-edge
    No fix yet
  • linux-oem
    No fix yet
  • linux-oracle-5.0
    No fix yet
  • linux-oracle-5.3
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • linux
    Fixed in 5.4.0-163.180
  • linux-aws
    Fixed in 5.4.0-1110.119
  • linux-aws-5.11
    No fix yet
  • linux-aws-5.13
    No fix yet
  • linux-aws-5.15
    Fixed in 5.15.0-1045.50~20.04.1
  • linux-aws-5.8
    No fix yet
  • linux-azure
    Fixed in 5.4.0-1116.123
  • linux-azure-5.11
    No fix yet
  • linux-azure-5.13
    No fix yet
  • linux-azure-5.15
    Fixed in 5.15.0-1047.54~20.04.1
  • linux-azure-5.8
    No fix yet
  • linux-azure-fde
    No fix yet
  • linux-bluefield
    Fixed in 5.4.0-1071.77
  • linux-gcp
    Fixed in 5.4.0-1113.122
  • linux-gcp-5.11
    No fix yet
  • linux-gcp-5.13
    No fix yet
  • linux-gcp-5.15
    Fixed in 5.15.0-1042.50~20.04.1
  • linux-gcp-5.8
    No fix yet
  • linux-gke
    No fix yet
  • linux-gke-5.15
    No fix yet
  • linux-gkeop
    Fixed in 5.4.0-1077.81
  • linux-gkeop-5.15
    Fixed in 5.15.0-1028.33~20.04.1
  • linux-hwe-5.11
    No fix yet
  • linux-hwe-5.13
    No fix yet
  • linux-hwe-5.15
    Fixed in 5.15.0-84.93~20.04.1
  • linux-hwe-5.8
    No fix yet
  • linux-ibm
    Fixed in 5.4.0-1057.62
  • linux-ibm-5.15
    Fixed in 5.15.0-1038.41~20.04.1
  • linux-intel-5.13
    No fix yet
  • linux-intel-iotg-5.15
    Fixed in 5.15.0-1040.46~20.04.1
  • linux-iot
    Fixed in 5.4.0-1022.23
  • linux-kvm
    Fixed in 5.4.0-1099.105
  • linux-lowlatency-hwe-5.15
    Fixed in 5.15.0-84.93~20.04.1
  • linux-nvidia-tegra-5.15
    Fixed in 5.15.0-1018.18~20.04.1
  • linux-oem-5.10
    No fix yet
  • linux-oem-5.13
    No fix yet
  • linux-oem-5.14
    No fix yet
  • linux-oem-5.6
    No fix yet
  • linux-oracle
    Fixed in 5.4.0-1109.118
  • linux-oracle-5.11
    No fix yet

10 further packages in Ubuntu 20.04 LTS not shown (first 40 listed).

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • linux
    Fixed in 5.15.0-84.93
  • linux-allwinner-5.19
    No fix yet
  • linux-aws
    Fixed in 5.15.0-1045.50
  • linux-aws-5.19
    No fix yet
  • linux-aws-6.2
    Fixed in 6.2.0-1012.12~22.04.1
  • linux-azure
    Fixed in 5.15.0-1047.54
  • linux-azure-5.19
    No fix yet
  • linux-azure-6.2
    Fixed in 6.2.0-1012.12~22.04.1
  • linux-azure-fde
    Fixed in 5.15.0-1047.54.1
  • linux-azure-fde-5.19
    No fix yet
  • linux-gcp
    Fixed in 5.15.0-1042.50
  • linux-gcp-5.19
    No fix yet
  • linux-gcp-6.2
    Fixed in 6.2.0-1014.14~22.04.1
  • linux-gke
    Fixed in 5.15.0-1042.47
  • linux-gkeop
    Fixed in 5.15.0-1028.33
  • linux-hwe-5.19
    No fix yet
  • linux-hwe-6.2
    Fixed in 6.2.0-33.33~22.04.1
  • linux-ibm
    Fixed in 5.15.0-1038.41
  • linux-intel-iotg
    Fixed in 5.15.0-1040.46
  • linux-kvm
    Fixed in 5.15.0-1042.47
  • linux-lowlatency
    Fixed in 5.15.0-84.93
  • linux-lowlatency-hwe-5.19
    No fix yet
  • linux-lowlatency-hwe-6.2
    Fixed in 6.2.0-1013.13~22.04.1
  • linux-nvidia
    Fixed in 5.15.0-1033.33
  • linux-nvidia-6.2
    No fix yet
  • linux-nvidia-tegra
    Fixed in 5.15.0-1018.18
  • linux-nvidia-tegra-igx
    Fixed in 5.15.0-1005.5
  • linux-oem-5.17
    No fix yet
  • linux-oem-6.0
    No fix yet
  • linux-oem-6.1
    Fixed in 6.1.0-1021.21
  • linux-oracle
    Fixed in 5.15.0-1044.50
  • linux-raspi
    Fixed in 5.15.0-1038.41
  • linux-realtime
    No fix yet
  • linux-riscv
    No fix yet
  • linux-riscv-5.19
    No fix yet
  • linux-starfive-5.19
    No fix yet
  • linux-xilinx-zynqmp
    Fixed in 5.15.0-1025.29

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • linux-raspi-realtime
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Nvidia-BlueField 22.04 LTS

  • linux-bluefield
    Fixed in 5.15.0-1024.26

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • linux-aws
    Fixed in 4.4.0-1123.129
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-azure
    Fixed in 4.15.0-1170.185~14.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-lts-xenial
    Fixed in 4.4.0-245.279~14.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • linux
    Fixed in 4.4.0-245.279
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-aws
    Fixed in 4.4.0-1161.176
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-aws-hwe
    Fixed in 4.15.0-1161.174~16.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-azure
    Fixed in 4.15.0-1170.185~16.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-gcp
    Fixed in 4.15.0-1155.172~16.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-hwe
    Fixed in 4.15.0-218.229~16.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-kvm
    Fixed in 4.4.0-1124.134
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-oracle
    Fixed in 4.15.0-1124.135~16.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • linux
    Fixed in 4.15.0-218.229
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-aws
    Fixed in 4.15.0-1161.174
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-aws-5.4
    Fixed in 5.4.0-1110.119~18.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-azure-4.15
    Fixed in 4.15.0-1170.185
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-azure-5.4
    Fixed in 5.4.0-1116.123~18.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-gcp-4.15
    Fixed in 4.15.0-1155.172
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-gcp-5.4
    Fixed in 5.4.0-1113.122~18.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-hwe-5.4
    Fixed in 5.4.0-163.180~18.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-ibm-5.4
    Fixed in 5.4.0-1057.62~18.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-kvm
    Fixed in 4.15.0-1145.150
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-oracle
    Fixed in 4.15.0-1124.135
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-oracle-5.4
    Fixed in 5.4.0-1109.118~18.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • linux-raspi-5.4
    Fixed in 5.4.0-1094.105~18.04.1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro FIPS-preview 22.04 LTS

  • linux-fips
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro FIPS-updates 16.04 LTS

  • linux-fips
    Fixed in 4.4.0-1093.100
    Available with Ubuntu Pro: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro FIPS-updates 18.04 LTS

  • linux-aws-fips
    Fixed in 4.15.0-2100.106
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • linux-azure-fips
    Fixed in 4.15.0-2079.85
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • linux-fips
    Fixed in 4.15.0-1116.127
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • linux-gcp-fips
    Fixed in 4.15.0-2063.68
    Available with Ubuntu Pro: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro FIPS-updates 20.04 LTS

  • linux-aws-fips
    Fixed in 5.4.0-1110.119+fips1
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • linux-azure-fips
    Fixed in 5.4.0-1116.123+fips1
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • linux-fips
    Fixed in 5.4.0-1085.94
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • linux-gcp-fips
    Fixed in 5.4.0-1113.122+fips1
    Available with Ubuntu Pro: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro FIPS 16.04 LTS

  • linux-fips
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro FIPS 18.04 LTS

  • linux-aws-fips
    No fix yet
  • linux-azure-fips
    No fix yet
  • linux-fips
    No fix yet
  • linux-gcp-fips
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro FIPS 20.04 LTS

  • linux-aws-fips
    No fix yet
  • linux-azure-fips
    No fix yet
  • linux-fips
    No fix yet
  • linux-gcp-fips
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro Realtime 22.04 LTS

  • linux-intel-iot-realtime
    Fixed in 5.15.0-1039.41
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • linux-realtime
    Fixed in 5.15.0-1046.52
    Available with Ubuntu Pro: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.