CVE-2023-23454
cbq_classify in net/sched/sch_cbq.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service (slab-out-of-bounds read) because of type confusion (non-negative numbers can
02 Description
cbq_classify in net/sched/sch_cbq.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service (slab-out-of-bounds read) because of type confusion (non-negative numbers can
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.34% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 27.5% of scored records. A rank, not a probability.
- NVD base score
- 5.5 (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:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-10-14.
- Red Hat severity
- Moderate. 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
- 2023-01-12 00:00Z3 YR AGO
- Last updated
- 2026-10-14 22:23Z14 DAYS AGO
- Reserved
- 2023-01-12
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.5)
- CNA CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-843Access of Resource Using Incompatible Type ('Type Confusion')Base
- Data version
- 5.2
- Document digest
- 781b7c2e6299b08a49db196dfc50abb90657569d0c0cfbb5e23edfe53879f6f4
05 Affected products
06 References
- www.openwall.comhttps://www.openwall.com/lists/oss-security/2023/01/10/1
- www.openwall.comhttps://www.openwall.com/lists/oss-security/2023/01/10/4
- git.kernel.orghttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=caa4b35b4317d5147b3ab0fbdc9c075c7d2e9c12
- www.debian.orgDSA-5324https://www.debian.org/security/2023/dsa-5324
- lists.debian.org[debian-lts-announce] 20230302 [SECURITY] [DLA 3349-1] linux-5.10 security updatehttps://lists.debian.org/debian-lts-announce/2023/03/msg00000.html
- lists.debian.org[debian-lts-announce] 20230503 [SECURITY] [DLA 3403-1] linux security updatehttps://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-794697.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-806742.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-769027.html
07 Fixed in
AlmaLinux 8
- bpftool Fixed in 4.18.0-477.10.1.el8_8
- kernel Fixed in 4.18.0-477.10.1.el8_8
- kernel-abi-stablelists Fixed in 4.18.0-477.10.1.el8_8
- kernel-core Fixed in 4.18.0-477.10.1.el8_8
- kernel-cross-headers Fixed in 4.18.0-477.10.1.el8_8
- kernel-debug Fixed in 4.18.0-477.10.1.el8_8
- kernel-debug-core Fixed in 4.18.0-477.10.1.el8_8
- kernel-debug-devel Fixed in 4.18.0-477.10.1.el8_8
- kernel-debug-modules Fixed in 4.18.0-477.10.1.el8_8
- kernel-debug-modules-extra Fixed in 4.18.0-477.10.1.el8_8
- kernel-devel Fixed in 4.18.0-477.10.1.el8_8
- kernel-doc Fixed in 4.18.0-477.10.1.el8_8
- kernel-modules Fixed in 4.18.0-477.10.1.el8_8
- kernel-modules-extra Fixed in 4.18.0-477.10.1.el8_8
- kernel-rt Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-core Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-debug Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-debug-core Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-debug-devel Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-debug-kvm Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-debug-modules Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-debug-modules-extra Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-devel Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-kvm Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-modules Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-modules-extra Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-tools Fixed in 4.18.0-477.10.1.el8_8
- kernel-tools-libs Fixed in 4.18.0-477.10.1.el8_8
- kernel-tools-libs-devel Fixed in 4.18.0-477.10.1.el8_8
- kernel-zfcpdump Fixed in 4.18.0-477.10.1.el8_8
- kernel-zfcpdump-core Fixed in 4.18.0-477.10.1.el8_8
- kernel-zfcpdump-devel Fixed in 4.18.0-477.10.1.el8_8
- kernel-zfcpdump-modules Fixed in 4.18.0-477.10.1.el8_8
- kernel-zfcpdump-modules-extra Fixed in 4.18.0-477.10.1.el8_8
- perf Fixed in 4.18.0-477.10.1.el8_8
- python3-perf Fixed in 4.18.0-477.10.1.el8_8
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Arch Linux
- linux Fixed in 6.2-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
CloudLinux 8
- bpftool Fixed in 4.18.0-477.10.1.el8_8
- kernel Fixed in 4.18.0-477.10.1.el8_8
- kernel-abi-stablelists Fixed in 4.18.0-477.10.1.el8_8
- kernel-core Fixed in 4.18.0-477.10.1.el8_8
- kernel-cross-headers Fixed in 4.18.0-477.10.1.el8_8
- kernel-debug Fixed in 4.18.0-477.10.1.el8_8
- kernel-debug-core Fixed in 4.18.0-477.10.1.el8_8
- kernel-debug-devel Fixed in 4.18.0-477.10.1.el8_8
- kernel-debug-modules Fixed in 4.18.0-477.10.1.el8_8
- kernel-debug-modules-extra Fixed in 4.18.0-477.10.1.el8_8
- kernel-devel Fixed in 4.18.0-477.10.1.el8_8
- kernel-doc Fixed in 4.18.0-477.10.1.el8_8
- kernel-modules Fixed in 4.18.0-477.10.1.el8_8
- kernel-modules-extra Fixed in 4.18.0-477.10.1.el8_8
- kernel-rt Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-core Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-debug Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-debug-core Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-debug-devel Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-debug-kvm Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-debug-modules Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-debug-modules-extra Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-devel Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-kvm Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-modules Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-rt-modules-extra Fixed in 4.18.0-477.10.1.rt7.274.el8_8
- kernel-tools Fixed in 4.18.0-477.10.1.el8_8
- kernel-tools-libs Fixed in 4.18.0-477.10.1.el8_8
- kernel-tools-libs-devel Fixed in 4.18.0-477.10.1.el8_8
- kernel-zfcpdump Fixed in 4.18.0-477.10.1.el8_8
- kernel-zfcpdump-core Fixed in 4.18.0-477.10.1.el8_8
- kernel-zfcpdump-devel Fixed in 4.18.0-477.10.1.el8_8
- kernel-zfcpdump-modules Fixed in 4.18.0-477.10.1.el8_8
- kernel-zfcpdump-modules-extra Fixed in 4.18.0-477.10.1.el8_8
- perf Fixed in 4.18.0-477.10.1.el8_8
- python3-perf Fixed in 4.18.0-477.10.1.el8_8
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 6.1.7-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 6.1.7-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 6.1.7-1
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-aws-5.4 Fixed in 5.4.0-1097.105~18.04.1
- linux-azure No fix yet
- linux-azure-5.3 No fix yet
- linux-azure-5.4 Fixed in 5.4.0-1104.110~18.04.1
- linux-azure-edge No fix yet
- linux-gcp No fix yet
- linux-gcp-5.3 No fix yet
- linux-gcp-5.4 Fixed in 5.4.0-1101.110~18.04.1
- 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-5.4 Fixed in 5.4.0-144.161~18.04.1
- linux-hwe-edge No fix yet
- linux-ibm-5.4 Fixed in 5.4.0-1045.50~18.04.1
- linux-oem No fix yet
- linux-oracle-5.0 No fix yet
- linux-oracle-5.3 No fix yet
- linux-oracle-5.4 Fixed in 5.4.0-1094.103~18.04.1
- linux-raspi-5.4 Fixed in 5.4.0-1081.92~18.04.1
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 5.4.0-144.161
- linux-aws Fixed in 5.4.0-1097.105
- linux-aws-5.11 No fix yet
- linux-aws-5.13 No fix yet
- linux-aws-5.15 Fixed in 5.15.0-1033.37~20.04.1
- linux-aws-5.8 No fix yet
- linux-azure Fixed in 5.4.0-1104.110
- linux-azure-5.11 No fix yet
- linux-azure-5.13 No fix yet
- linux-azure-5.15 Fixed in 5.15.0-1035.42~20.04.1
- linux-azure-5.8 No fix yet
- linux-bluefield Fixed in 5.4.0-1059.65
- linux-gcp Fixed in 5.4.0-1101.110
- linux-gcp-5.11 No fix yet
- linux-gcp-5.13 No fix yet
- linux-gcp-5.15 Fixed in 5.15.0-1031.38~20.04.1
- linux-gcp-5.8 No fix yet
- linux-gke Fixed in 5.4.0-1095.102
- linux-gke-5.15 Fixed in 5.15.0-1029.34~20.04.1
- linux-gkeop Fixed in 5.4.0-1065.69
- linux-gkeop-5.15 Fixed in 5.15.0-1017.22~20.04.1
- linux-hwe-5.11 No fix yet
- linux-hwe-5.13 No fix yet
- linux-hwe-5.15 Fixed in 5.15.0-69.76~20.04.1
- linux-hwe-5.8 No fix yet
- linux-ibm Fixed in 5.4.0-1045.50
- linux-intel-5.13 No fix yet
- linux-intel-iotg-5.15 Fixed in 5.15.0-1027.32~20.04.1
- linux-iot Fixed in 5.4.0-1013.15
- linux-kvm Fixed in 5.4.0-1087.93
- linux-lowlatency-hwe-5.15 Fixed in 5.15.0-69.76~20.04.1
- linux-nvidia-tegra-5.15 Fixed in 5.15.0-1014.14~20.04.1
- 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 5.4.0-1094.103
- linux-oracle-5.11 No fix yet
- linux-oracle-5.13 No fix yet
- linux-oracle-5.15 Fixed in 5.15.0-1032.38~20.04.1
8 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 5.15.0-69.76
- linux-aws Fixed in 5.15.0-1033.37
- linux-azure Fixed in 5.15.0-1035.42
- linux-azure-5.19 Fixed in 5.19.0-1026.29~22.04.1
- linux-azure-fde Fixed in 5.15.0-1035.42.1
- linux-gcp Fixed in 5.15.0-1031.38
- linux-gke Fixed in 5.15.0-1030.35
- linux-gkeop Fixed in 5.15.0-1017.22
- linux-hwe-5.19 Fixed in 5.19.0-42.43~22.04.1
- linux-ibm Fixed in 5.15.0-1027.30
- linux-intel-iotg Fixed in 5.15.0-1027.32
- linux-kvm Fixed in 5.15.0-1030.35
- linux-lowlatency Fixed in 5.15.0-69.76
- linux-lowlatency-hwe-5.19 Fixed in 5.19.0-1024.25~22.04.1
- linux-nvidia Fixed in 5.15.0-1023.23
- linux-oem-5.17 No fix yet
- linux-oem-6.0 No fix yet
- linux-oem-6.1 Fixed in 6.1.0-1007.7
- linux-oracle Fixed in 5.15.0-1032.38
- linux-raspi Fixed in 5.15.0-1026.28
- linux-realtime No fix yet
- linux-riscv No fix yet
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 5.15.0-1015.17
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 No fix yet
- linux-aws No fix yet
- linux-azure No fix yet
- linux-lts-xenial No fix yet
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 No fix yet
- linux-aws No fix yet
- linux-aws-hwe No fix yet
- linux-azure No fix yet
- linux-gcp No fix yet
- linux-hwe No fix yet
- linux-kvm No fix yet
- linux-oracle No fix yet
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 No fix yet
- linux-aws No fix yet
- linux-azure-4.15 No fix yet
- linux-gcp-4.15 No fix yet
- linux-kvm No fix yet
- linux-oracle 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 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 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-updates 20.04 LTS
- linux-aws-fips Fixed in 5.4.0-1099.107+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 5.4.0-1104.110+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-fips Fixed in 5.4.0-1073.82Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-gcp-fips Fixed in 5.4.0-1101.110+fips1Available 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 5.15.0-1023.28Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-realtime Fixed in 5.15.0-1034.37Available 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.