CVE-2023-39193: Linux Kernel Netfilter Xtables Out-Of-Bounds Read Information Disclosure Vulnerability
First published: Wed Jul 26 2023(Updated: )
A flaw was found in the Netfilter subsystem in the Linux kernel. The sctp_mt_check did not validate the flag_count field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure.
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <6.6 | |
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Linux | =9.0 | |
| Fedoraproject Fedora | =38 | |
| Linux kernel | ||
| ubuntu/linux | <4.15.0-220.231 | 4.15.0-220.231 |
| ubuntu/linux | <5.4.0-169.187 | 5.4.0-169.187 |
| ubuntu/linux | <5.15.0-91.101 | 5.15.0-91.101 |
| ubuntu/linux | <6.2.0-39.40 | 6.2.0-39.40 |
| ubuntu/linux | <6.6~ | 6.6~ |
| ubuntu/linux | <4.4.0-248.282 | 4.4.0-248.282 |
| ubuntu/linux-aws | <4.15.0-1163.176 | 4.15.0-1163.176 |
| ubuntu/linux-aws | <5.4.0-1116.126 | 5.4.0-1116.126 |
| ubuntu/linux-aws | <5.15.0-1051.56 | 5.15.0-1051.56 |
| ubuntu/linux-aws | <6.2.0-1017.17 | 6.2.0-1017.17 |
| ubuntu/linux-aws | <4.4.0-1125.131 | 4.4.0-1125.131 |
| ubuntu/linux-aws | <6.6~ | 6.6~ |
| ubuntu/linux-aws | <4.4.0-1163.178 | 4.4.0-1163.178 |
| ubuntu/linux-aws-5.15 | <5.15.0-1051.56~20.04.1 | 5.15.0-1051.56~20.04.1 |
| ubuntu/linux-aws-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-aws-5.4 | <5.4.0-1116.126~18.04.1 | 5.4.0-1116.126~18.04.1 |
| ubuntu/linux-aws-5.4 | <6.6~ | 6.6~ |
| ubuntu/linux-aws-6.2 | <6.2.0-1017.17~22.04.1 | 6.2.0-1017.17~22.04.1 |
| ubuntu/linux-aws-6.2 | <6.6~ | 6.6~ |
| ubuntu/linux-aws-hwe | <6.6~ | 6.6~ |
| ubuntu/linux-aws-hwe | <4.15.0-1163.176~16.04.1 | 4.15.0-1163.176~16.04.1 |
| ubuntu/linux-azure | <5.4.0-1121.128 | 5.4.0-1121.128 |
| ubuntu/linux-azure | <5.15.0-1053.61 | 5.15.0-1053.61 |
| ubuntu/linux-azure | <6.2.0-1018.18 | 6.2.0-1018.18 |
| ubuntu/linux-azure | <4.15.0-1172.187~14.04.1 | 4.15.0-1172.187~14.04.1 |
| ubuntu/linux-azure | <6.6~ | 6.6~ |
| ubuntu/linux-azure | <4.15.0-1172.187~16.04.1 | 4.15.0-1172.187~16.04.1 |
| ubuntu/linux-azure-4.15 | <4.15.0-1172.187 | 4.15.0-1172.187 |
| ubuntu/linux-azure-4.15 | <6.6~ | 6.6~ |
| ubuntu/linux-azure-5.15 | <5.15.0-1053.61~20.04.1 | 5.15.0-1053.61~20.04.1 |
| ubuntu/linux-azure-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-azure-5.4 | <5.4.0-1121.128~18.04.1 | 5.4.0-1121.128~18.04.1 |
| ubuntu/linux-azure-5.4 | <6.6~ | 6.6~ |
| ubuntu/linux-azure-6.2 | <6.2.0-1018.18~22.04.1 | 6.2.0-1018.18~22.04.1 |
| ubuntu/linux-azure-6.2 | <6.6~ | 6.6~ |
| ubuntu/linux-azure-fde | <5.15.0-1053.61.1 | 5.15.0-1053.61.1 |
| ubuntu/linux-azure-fde | <6.6~ | 6.6~ |
| ubuntu/linux-azure-fde-5.15 | <5.15.0-1053.61~20.04.1.1 | 5.15.0-1053.61~20.04.1.1 |
| ubuntu/linux-azure-fde-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-azure-fde-6.2 | <6.2.0-1018.18~22.04.1.1 | 6.2.0-1018.18~22.04.1.1 |
| ubuntu/linux-azure-fde-6.2 | <6.6~ | 6.6~ |
| ubuntu/linux-bluefield | <5.4.0-1076.82 | 5.4.0-1076.82 |
| ubuntu/linux-bluefield | <6.6~ | 6.6~ |
| ubuntu/linux-fips | <6.6~ | 6.6~ |
| ubuntu/linux-gcp | <5.4.0-1120.129 | 5.4.0-1120.129 |
| ubuntu/linux-gcp | <5.15.0-1048.56 | 5.15.0-1048.56 |
| ubuntu/linux-gcp | <6.2.0-1020.22 | 6.2.0-1020.22 |
| ubuntu/linux-gcp | <6.6~ | 6.6~ |
| ubuntu/linux-gcp | <4.15.0-1157.174~16.04.1 | 4.15.0-1157.174~16.04.1 |
| ubuntu/linux-gcp-4.15 | <4.15.0-1157.174 | 4.15.0-1157.174 |
| ubuntu/linux-gcp-4.15 | <6.6~ | 6.6~ |
| ubuntu/linux-gcp-5.15 | <5.15.0-1048.56~20.04.1 | 5.15.0-1048.56~20.04.1 |
| ubuntu/linux-gcp-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-gcp-5.19 | <6.6~ | 6.6~ |
| ubuntu/linux-gcp-5.4 | <5.4.0-1120.129~18.04.1 | 5.4.0-1120.129~18.04.1 |
| ubuntu/linux-gcp-5.4 | <6.6~ | 6.6~ |
| ubuntu/linux-gcp-6.2 | <6.2.0-1021.23~22.04.1 | 6.2.0-1021.23~22.04.1 |
| ubuntu/linux-gke | <5.15.0-1048.53 | 5.15.0-1048.53 |
| ubuntu/linux-gke | <6.6~ | 6.6~ |
| ubuntu/linux-gkeop | <5.4.0-1083.87 | 5.4.0-1083.87 |
| ubuntu/linux-gkeop | <5.15.0-1034.40 | 5.15.0-1034.40 |
| ubuntu/linux-gkeop | <6.6~ | 6.6~ |
| ubuntu/linux-gkeop-5.15 | <5.15.0-1034.40~20.04.1 | 5.15.0-1034.40~20.04.1 |
| ubuntu/linux-gkeop-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-hwe | <6.6~ | 6.6~ |
| ubuntu/linux-hwe | <4.15.0-220.231~16.04.1 | 4.15.0-220.231~16.04.1 |
| ubuntu/linux-hwe-5.15 | <5.15.0-91.101~20.04.1 | 5.15.0-91.101~20.04.1 |
| ubuntu/linux-hwe-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-hwe-5.4 | <5.4.0-169.187~18.04.1 | 5.4.0-169.187~18.04.1 |
| ubuntu/linux-hwe-5.4 | <6.6~ | 6.6~ |
| ubuntu/linux-hwe-6.2 | <6.2.0-39.40~22.04.1 | 6.2.0-39.40~22.04.1 |
| ubuntu/linux-hwe-6.2 | <6.6~ | 6.6~ |
| ubuntu/linux-ibm | <5.4.0-1063.68 | 5.4.0-1063.68 |
| ubuntu/linux-ibm | <5.15.0-1044.47 | 5.15.0-1044.47 |
| ubuntu/linux-ibm | <6.6~ | 6.6~ |
| ubuntu/linux-ibm-5.15 | <5.15.0-1044.47~20.04.1 | 5.15.0-1044.47~20.04.1 |
| ubuntu/linux-ibm-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-ibm-5.4 | <5.4.0-1063.68~18.04.1 | 5.4.0-1063.68~18.04.1 |
| ubuntu/linux-ibm-5.4 | <6.6~ | 6.6~ |
| ubuntu/linux-intel-iotg | <5.15.0-1046.52 | 5.15.0-1046.52 |
| ubuntu/linux-intel-iotg | <6.6~ | 6.6~ |
| ubuntu/linux-intel-iotg-5.15 | <5.15.0-1046.52~20.04.1 | 5.15.0-1046.52~20.04.1 |
| ubuntu/linux-intel-iotg-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-iot | <5.4.0-1028.29 | 5.4.0-1028.29 |
| ubuntu/linux-iot | <6.6~ | 6.6~ |
| ubuntu/linux-kvm | <4.15.0-1147.152 | 4.15.0-1147.152 |
| ubuntu/linux-kvm | <5.4.0-1104.111 | 5.4.0-1104.111 |
| ubuntu/linux-kvm | <5.15.0-1048.53 | 5.15.0-1048.53 |
| ubuntu/linux-kvm | <6.2.0-1018.18 | 6.2.0-1018.18 |
| ubuntu/linux-kvm | <6.6~ | 6.6~ |
| ubuntu/linux-kvm | <4.4.0-1126.136 | 4.4.0-1126.136 |
| ubuntu/linux-lowlatency | <5.15.0-91.101 | 5.15.0-91.101 |
| ubuntu/linux-lowlatency | <6.2.0-1018.18 | 6.2.0-1018.18 |
| ubuntu/linux-lowlatency | <6.6~ | 6.6~ |
| ubuntu/linux-lowlatency-hwe-5.15 | <5.15.0-91.101~20.04.1 | 5.15.0-91.101~20.04.1 |
| ubuntu/linux-lowlatency-hwe-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-lowlatency-hwe-6.2 | <6.2.0-1018.18~22.04.1 | 6.2.0-1018.18~22.04.1 |
| ubuntu/linux-lowlatency-hwe-6.2 | <6.6~ | 6.6~ |
| ubuntu/linux-lts-xenial | <4.4.0-248.282~14.04.1 | 4.4.0-248.282~14.04.1 |
| ubuntu/linux-lts-xenial | <6.6~ | 6.6~ |
| ubuntu/linux-nvidia | <5.15.0-1042.42 | 5.15.0-1042.42 |
| ubuntu/linux-nvidia | <6.6~ | 6.6~ |
| ubuntu/linux-nvidia-6.2 | <6.2.0-1013.13 | 6.2.0-1013.13 |
| ubuntu/linux-nvidia-6.2 | <6.6~ | 6.6~ |
| ubuntu/linux-oem-6.1 | <6.1.0-1023.23 | 6.1.0-1023.23 |
| ubuntu/linux-oem-6.1 | <6.6~ | 6.6~ |
| ubuntu/linux-oracle | <4.15.0-1126.137 | 4.15.0-1126.137 |
| ubuntu/linux-oracle | <5.4.0-1115.124 | 5.4.0-1115.124 |
| ubuntu/linux-oracle | <5.15.0-1049.55 | 5.15.0-1049.55 |
| ubuntu/linux-oracle | <6.2.0-1017.18 | 6.2.0-1017.18 |
| ubuntu/linux-oracle | <6.6~ | 6.6~ |
| ubuntu/linux-oracle | <4.15.0-1126.137~16.04.1 | 4.15.0-1126.137~16.04.1 |
| ubuntu/linux-oracle-5.15 | <5.15.0-1049.55~20.04.1 | 5.15.0-1049.55~20.04.1 |
| ubuntu/linux-oracle-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-oracle-5.4 | <5.4.0-1115.124~18.04.1 | 5.4.0-1115.124~18.04.1 |
| ubuntu/linux-oracle-5.4 | <6.6~ | 6.6~ |
| ubuntu/linux-raspi | <5.4.0-1100.112 | 5.4.0-1100.112 |
| ubuntu/linux-raspi | <5.15.0-1044.47 | 5.15.0-1044.47 |
| ubuntu/linux-raspi | <6.2.0-1018.20 | 6.2.0-1018.20 |
| ubuntu/linux-raspi | <6.6~ | 6.6~ |
| ubuntu/linux-raspi-5.4 | <5.4.0-1100.112~18.04.1 | 5.4.0-1100.112~18.04.1 |
| ubuntu/linux-raspi-5.4 | <6.6~ | 6.6~ |
| ubuntu/linux-riscv | <6.2.0-39.40.1 | 6.2.0-39.40.1 |
| ubuntu/linux-riscv | <6.6~ | 6.6~ |
| ubuntu/linux-riscv-5.15 | <5.15.0-1047.51~20.04.1 | 5.15.0-1047.51~20.04.1 |
| ubuntu/linux-riscv-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-starfive | <6.2.0-1010.11 | 6.2.0-1010.11 |
| ubuntu/linux-starfive | <6.6~ | 6.6~ |
| ubuntu/linux-starfive-6.2 | <6.6~ | 6.6~ |
| ubuntu/linux-xilinx-zynqmp | <5.4.0-1035.39 | 5.4.0-1035.39 |
| ubuntu/linux-xilinx-zynqmp | <5.15.0-1027.31 | 5.15.0-1027.31 |
| ubuntu/linux-xilinx-zynqmp | <6.6~ | 6.6~ |
| redhat/kernel | <6.6 | 6.6 |
| debian/linux | <=4.19.249-2 | 4.19.304-1 5.10.209-2 5.10.216-1 6.1.76-1 6.1.90-1 6.7.12-1 6.8.9-1 |
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Reference Links
- https://access.redhat.com/security/cve/CVE-2023-39193
- https://bugzilla.redhat.com/show_bug.cgi?id=2226787
- https://www.zerodayinitiative.com/advisories/ZDI-CAN-18866/
- https://lore.kernel.org/all/20230828221255.124812-1-wander@redhat.com/
- https://www.zerodayinitiative.com/advisories/ZDI-23-1491/
- https://github.com/torvalds/linux/commit/e99476497687ef9e850748fe6d232264f30bc8f9
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2242879
- https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
- https://launchpad.net/bugs/cve/CVE-2023-39193
- https://git.kernel.org/linus/e99476497687ef9e850748fe6d232264f30bc8f9 (6.6-rc1)
- https://ubuntu.com/security/notices/USN-6494-1
- https://ubuntu.com/security/notices/USN-6494-2
- https://ubuntu.com/security/notices/USN-6532-1
- https://ubuntu.com/security/notices/USN-6534-1
- https://ubuntu.com/security/notices/USN-6548-1
- https://ubuntu.com/security/notices/USN-6549-1
- https://ubuntu.com/security/notices/USN-6534-2
- https://ubuntu.com/security/notices/USN-6549-2
- https://ubuntu.com/security/notices/USN-6548-2
- https://ubuntu.com/security/notices/USN-6534-3
- https://ubuntu.com/security/notices/USN-6548-3
- https://ubuntu.com/security/notices/USN-6549-3
- https://ubuntu.com/security/notices/USN-6549-4
- https://ubuntu.com/security/notices/USN-6548-4
- https://ubuntu.com/security/notices/USN-6548-5
- https://ubuntu.com/security/notices/USN-6549-5
- https://ubuntu.com/security/notices/USN-6635-1
- https://www.cve.org/CVERecord?id=CVE-2023-39193
- https://nvd.nist.gov/vuln/detail/CVE-2023-39193
- https://security-tracker.debian.org/tracker/CVE-2023-39193
- https://git.kernel.org/linus/2e4e6a17af35be359cc8f1c924f8f198fbd478cc
- https://git.kernel.org/linus/e99476497687ef9e850748fe6d232264f30bc8f9
- https://ubuntu.com/security/CVE-2023-39193
- https://access.redhat.com/errata/RHSA-2024:2394
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the severity of CVE-2023-39193?
The severity of CVE-2023-39193 is medium.
How can a local attacker exploit CVE-2023-39193?
A local attacker can exploit CVE-2023-39193 by executing high-privileged code on the target system.
What is the affected software for CVE-2023-39193?
The affected software for CVE-2023-39193 includes Linux Kernel, Redhat Enterprise Linux, and Fedora.
What is the remedy for CVE-2023-39193?
The remedy for CVE-2023-39193 is to update the kernel package to version 6.6.
Where can I find more information about CVE-2023-39193?
More information about CVE-2023-39193 can be found at the following references: [Reference 1](https://access.redhat.com/security/cve/CVE-2023-39193), [Reference 2](https://bugzilla.redhat.com/show_bug.cgi?id=2226787), [Reference 3](https://www.zerodayinitiative.com/advisories/ZDI-CAN-18866/).
- collector/nvd-index
- agent/type
- agent/remedy
- agent/first-publish-date
- agent/author
- agent/title
- agent/severity
- agent/weakness
- collector/zdi-advisory
- source/ZDI
- alias/ZDI-23-1491
- alias/ZDI-CAN-18866
- alias/CVE-2023-39193
- agent/software-canonical-lookup
- collector/redhat-bugzilla
- source/Red Hat
- collector/nvd-cve
- source/NVD
- collector/launchpad-cve
- source/Launchpad
- agent/description
- agent/event
- collector/usn-cve
- source/Ubuntu
- agent/references
- agent/tags
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- collector/nvd-api
- vendor/linux
- canonical/linux linux kernel
- vendor/redhat
- canonical/redhat enterprise linux
- version/redhat enterprise linux/8.0
- version/redhat enterprise linux/9.0
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/38
- canonical/linux kernel
- package-manager/redhat
- package-manager/ubuntu
- package-manager/debian