CVE-2023-46838: Linux: netback processing of zero-length transmit fragment
First published: Mon Jan 22 2024(Updated: )
Transmit requests in Xen's virtual network protocol can consist of multiple parts. While not really useful, except for the initial part any of them may be of zero length, i.e. carry no data at all. Besides a certain initial portion of the to be transferred data, these parts are directly translated into what Linux calls SKB fragments. Such converted request parts can, when for a particular SKB they are all of length zero, lead to a de-reference of NULL in core networking code.
Credit: security@xen.org security@xen.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=4.14<6.7 | |
| Fedoraproject Fedora | =38 | |
| Fedoraproject Fedora | =39 | |
| ubuntu/linux | <4.15.0-223.235 | 4.15.0-223.235 |
| ubuntu/linux | <5.4.0-176.196 | 5.4.0-176.196 |
| ubuntu/linux | <5.15.0-102.112 | 5.15.0-102.112 |
| ubuntu/linux | <6.5.0-27.28 | 6.5.0-27.28 |
| ubuntu/linux | <6.8~ | 6.8~ |
| ubuntu/linux-aws | <4.15.0-1166.179 | 4.15.0-1166.179 |
| ubuntu/linux-aws | <5.4.0-1122.132 | 5.4.0-1122.132 |
| ubuntu/linux-aws | <5.15.0-1057.63 | 5.15.0-1057.63 |
| ubuntu/linux-aws | <6.5.0-1017.17 | 6.5.0-1017.17 |
| ubuntu/linux-aws | <6.8~ | 6.8~ |
| ubuntu/linux-aws-5.15 | <5.15.0-1057.63~20.04.1 | 5.15.0-1057.63~20.04.1 |
| ubuntu/linux-aws-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-aws-5.4 | <5.4.0-1122.132~18.04.1 | 5.4.0-1122.132~18.04.1 |
| ubuntu/linux-aws-5.4 | <6.8~ | 6.8~ |
| ubuntu/linux-aws-6.5 | <6.5.0-1017.17~22.04.2 | 6.5.0-1017.17~22.04.2 |
| ubuntu/linux-aws-6.5 | <6.8~ | 6.8~ |
| ubuntu/linux-aws-hwe | <6.8~ | 6.8~ |
| ubuntu/linux-aws-hwe | <4.15.0-1166.179~16.04.1 | 4.15.0-1166.179~16.04.1 |
| ubuntu/linux-azure | <5.4.0-1127.134 | 5.4.0-1127.134 |
| ubuntu/linux-azure | <5.15.0-1060.69 | 5.15.0-1060.69 |
| ubuntu/linux-azure | <6.5.0-1018.19 | 6.5.0-1018.19 |
| ubuntu/linux-azure | <4.15.0-1175.190~14.04.1 | 4.15.0-1175.190~14.04.1 |
| ubuntu/linux-azure | <6.8~ | 6.8~ |
| ubuntu/linux-azure | <4.15.0-1175.190~16.04.1 | 4.15.0-1175.190~16.04.1 |
| ubuntu/linux-azure-4.15 | <4.15.0-1175.190 | 4.15.0-1175.190 |
| ubuntu/linux-azure-4.15 | <6.8~ | 6.8~ |
| ubuntu/linux-azure-5.15 | <5.15.0-1060.69~20.04.1 | 5.15.0-1060.69~20.04.1 |
| ubuntu/linux-azure-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-azure-5.4 | <5.4.0-1127.134~18.04.1 | 5.4.0-1127.134~18.04.1 |
| ubuntu/linux-azure-5.4 | <6.8~ | 6.8~ |
| ubuntu/linux-azure-6.5 | <6.5.0-1018.19~22.04.2 | 6.5.0-1018.19~22.04.2 |
| ubuntu/linux-azure-6.5 | <6.8~ | 6.8~ |
| ubuntu/linux-azure-fde | <5.15.0-1060.69.1 | 5.15.0-1060.69.1 |
| ubuntu/linux-azure-fde | <6.8~ | 6.8~ |
| ubuntu/linux-azure-fde-5.15 | <5.15.0-1060.69~20.04.1.1 | 5.15.0-1060.69~20.04.1.1 |
| ubuntu/linux-azure-fde-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-bluefield | <5.4.0-1082.89 | 5.4.0-1082.89 |
| ubuntu/linux-bluefield | <6.8~ | 6.8~ |
| ubuntu/linux-fips | <6.8~ | 6.8~ |
| ubuntu/linux-gcp | <5.4.0-1126.135 | 5.4.0-1126.135 |
| ubuntu/linux-gcp | <5.15.0-1055.63 | 5.15.0-1055.63 |
| ubuntu/linux-gcp | <6.5.0-1017.17 | 6.5.0-1017.17 |
| ubuntu/linux-gcp | <6.8~ | 6.8~ |
| ubuntu/linux-gcp | <4.15.0-1160.177~16.04.1 | 4.15.0-1160.177~16.04.1 |
| ubuntu/linux-gcp-4.15 | <4.15.0-1160.177 | 4.15.0-1160.177 |
| ubuntu/linux-gcp-4.15 | <6.8~ | 6.8~ |
| ubuntu/linux-gcp-5.15 | <5.15.0-1055.63~20.04.1 | 5.15.0-1055.63~20.04.1 |
| ubuntu/linux-gcp-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-gcp-5.4 | <5.4.0-1126.135~18.04.1 | 5.4.0-1126.135~18.04.1 |
| ubuntu/linux-gcp-5.4 | <6.8~ | 6.8~ |
| ubuntu/linux-gcp-6.5 | <6.5.0-1017.17~22.04.1 | 6.5.0-1017.17~22.04.1 |
| ubuntu/linux-gcp-6.5 | <6.8~ | 6.8~ |
| ubuntu/linux-gke | <5.15.0-1054.59 | 5.15.0-1054.59 |
| ubuntu/linux-gke | <6.8~ | 6.8~ |
| ubuntu/linux-gkeop | <5.4.0-1089.93 | 5.4.0-1089.93 |
| ubuntu/linux-gkeop | <5.15.0-1040.46 | 5.15.0-1040.46 |
| ubuntu/linux-gkeop | <6.8~ | 6.8~ |
| ubuntu/linux-gkeop-5.15 | <5.15.0-1040.46~20.04.1 | 5.15.0-1040.46~20.04.1 |
| ubuntu/linux-gkeop-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-hwe | <6.8~ | 6.8~ |
| ubuntu/linux-hwe | <4.15.0-223.235~16.04.1 | 4.15.0-223.235~16.04.1 |
| ubuntu/linux-hwe-5.15 | <5.15.0-102.112~20.04.1 | 5.15.0-102.112~20.04.1 |
| ubuntu/linux-hwe-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-hwe-5.4 | <5.4.0-175.195~18.04.1 | 5.4.0-175.195~18.04.1 |
| ubuntu/linux-hwe-5.4 | <6.8~ | 6.8~ |
| ubuntu/linux-hwe-6.5 | <6.5.0-27.28~22.04.1 | 6.5.0-27.28~22.04.1 |
| ubuntu/linux-hwe-6.5 | <6.8~ | 6.8~ |
| ubuntu/linux-ibm | <5.4.0-1069.74 | 5.4.0-1069.74 |
| ubuntu/linux-ibm | <5.15.0-1050.53 | 5.15.0-1050.53 |
| ubuntu/linux-ibm | <6.8~ | 6.8~ |
| ubuntu/linux-ibm-5.15 | <5.15.0-1050.53~20.04.1 | 5.15.0-1050.53~20.04.1 |
| ubuntu/linux-ibm-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-ibm-5.4 | <5.4.0-1069.74~18.04.1 | 5.4.0-1069.74~18.04.1 |
| ubuntu/linux-ibm-5.4 | <6.8~ | 6.8~ |
| ubuntu/linux-intel-iotg | <5.15.0-1052.58 | 5.15.0-1052.58 |
| ubuntu/linux-intel-iotg | <6.8~ | 6.8~ |
| ubuntu/linux-intel-iotg-5.15 | <5.15.0-1052.58~20.04.1 | 5.15.0-1052.58~20.04.1 |
| ubuntu/linux-intel-iotg-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-iot | <5.4.0-1034.35 | 5.4.0-1034.35 |
| ubuntu/linux-iot | <6.8~ | 6.8~ |
| ubuntu/linux-kvm | <4.15.0-1150.155 | 4.15.0-1150.155 |
| ubuntu/linux-kvm | <5.4.0-1110.117 | 5.4.0-1110.117 |
| ubuntu/linux-kvm | <5.15.0-1054.59 | 5.15.0-1054.59 |
| ubuntu/linux-kvm | <6.8~ | 6.8~ |
| ubuntu/linux-laptop | <6.5.0-1013.16 | 6.5.0-1013.16 |
| ubuntu/linux-laptop | <6.8~ | 6.8~ |
| ubuntu/linux-lowlatency | <5.15.0-102.112 | 5.15.0-102.112 |
| ubuntu/linux-lowlatency | <6.5.0-27.28.1 | 6.5.0-27.28.1 |
| ubuntu/linux-lowlatency | <6.8~ | 6.8~ |
| ubuntu/linux-lowlatency-hwe-5.15 | <5.15.0-102.112~20.04.1 | 5.15.0-102.112~20.04.1 |
| ubuntu/linux-lowlatency-hwe-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-lowlatency-hwe-6.5 | <6.5.0-27.28.1~22.04.1 | 6.5.0-27.28.1~22.04.1 |
| ubuntu/linux-lowlatency-hwe-6.5 | <6.8~ | 6.8~ |
| ubuntu/linux-lts-xenial | <6.8~ | 6.8~ |
| ubuntu/linux-nvidia | <5.15.0-1048.48 | 5.15.0-1048.48 |
| ubuntu/linux-nvidia | <6.8~ | 6.8~ |
| ubuntu/linux-oem-6.1 | <6.1.0-1035.35 | 6.1.0-1035.35 |
| ubuntu/linux-oem-6.1 | <6.8~ | 6.8~ |
| ubuntu/linux-oem-6.5 | <6.5.0-1019.20 | 6.5.0-1019.20 |
| ubuntu/linux-oem-6.5 | <6.8~ | 6.8~ |
| ubuntu/linux-oracle | <4.15.0-1129.140 | 4.15.0-1129.140 |
| ubuntu/linux-oracle | <5.4.0-1121.130 | 5.4.0-1121.130 |
| ubuntu/linux-oracle | <5.15.0-1055.61 | 5.15.0-1055.61 |
| ubuntu/linux-oracle | <6.5.0-1020.20 | 6.5.0-1020.20 |
| ubuntu/linux-oracle | <6.8~ | 6.8~ |
| ubuntu/linux-oracle | <4.15.0-1129.140~16.04.1 | 4.15.0-1129.140~16.04.1 |
| ubuntu/linux-oracle-5.15 | <5.15.0-1055.61~20.04.1 | 5.15.0-1055.61~20.04.1 |
| ubuntu/linux-oracle-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-oracle-5.4 | <5.4.0-1121.130~18.04.1 | 5.4.0-1121.130~18.04.1 |
| ubuntu/linux-oracle-5.4 | <6.8~ | 6.8~ |
| ubuntu/linux-oracle-6.5 | <6.5.0-1020.20~22.04.1 | 6.5.0-1020.20~22.04.1 |
| ubuntu/linux-raspi | <5.4.0-1106.118 | 5.4.0-1106.118 |
| ubuntu/linux-raspi | <5.15.0-1050.53 | 5.15.0-1050.53 |
| ubuntu/linux-raspi | <6.5.0-1014.17 | 6.5.0-1014.17 |
| ubuntu/linux-raspi | <6.8~ | 6.8~ |
| ubuntu/linux-raspi-5.4 | <5.4.0-1106.118~18.04.1 | 5.4.0-1106.118~18.04.1 |
| ubuntu/linux-raspi-5.4 | <6.8~ | 6.8~ |
| ubuntu/linux-riscv | <6.5.0-27.28.1 | 6.5.0-27.28.1 |
| ubuntu/linux-riscv | <6.8~ | 6.8~ |
| ubuntu/linux-riscv-5.15 | <5.15.0-1053.57~20.04.1 | 5.15.0-1053.57~20.04.1 |
| ubuntu/linux-riscv-5.15 | <6.8~ | 6.8~ |
| ubuntu/linux-riscv-6.5 | <6.5.0-27.28.1~22.04.1 | 6.5.0-27.28.1~22.04.1 |
| ubuntu/linux-riscv-6.5 | <6.8~ | 6.8~ |
| ubuntu/linux-starfive | <6.5.0-1011.12 | 6.5.0-1011.12 |
| ubuntu/linux-starfive | <6.8~ | 6.8~ |
| ubuntu/linux-starfive-6.5 | <6.5.0-1011.12~22.04.1 | 6.5.0-1011.12~22.04.1 |
| ubuntu/linux-starfive-6.5 | <6.8~ | 6.8~ |
| ubuntu/linux-xilinx-zynqmp | <5.4.0-1041.45 | 5.4.0-1041.45 |
| ubuntu/linux-xilinx-zynqmp | <6.8~ | 6.8~ |
| debian/linux | <=4.19.249-2<=4.19.304-1<=5.10.205-2 | 5.10.209-2 6.1.76-1 6.1.85-1 6.6.15-2 6.7.12-1 |
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Reference Links
- https://xenbits.xenproject.org/xsa/advisory-448.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZFYW6R64GPLUOXSQBJI3JBUX3HGLAYPP/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RGEKT4DKSDXDS34EL7M4UVJMMPH7Z3ZZ/
- https://launchpad.net/bugs/cve/CVE-2023-46838
- https://xenbits.xen.org/xsa/advisory-448.html
- https://git.kernel.org/linus/c7ec4f2d684e17d69bbdd7c4324db0ef5daac26a
- https://security-tracker.debian.org/tracker/CVE-2023-46838
- https://www.openwall.com/lists/oss-security/2024/01/22/2
- https://ubuntu.com/security/notices/USN-6688-1
- https://ubuntu.com/security/notices/USN-6701-1
- https://ubuntu.com/security/notices/USN-6701-2
- https://ubuntu.com/security/notices/USN-6701-3
- https://ubuntu.com/security/notices/USN-6701-4
- https://ubuntu.com/security/notices/USN-6724-1
- https://ubuntu.com/security/notices/USN-6725-1
- https://ubuntu.com/security/notices/USN-6726-1
- https://www.cve.org/CVERecord?id=CVE-2023-46838
- https://ubuntu.com/security/notices/USN-6724-2
- https://ubuntu.com/security/notices/USN-6725-2
- https://ubuntu.com/security/notices/USN-6726-2
- https://ubuntu.com/security/notices/USN-6726-3
- https://nvd.nist.gov/vuln/detail/CVE-2023-46838
- https://git.kernel.org/linus/3ece782693c4b64d588dd217868558ab9a19bfe7
- https://ubuntu.com/security/CVE-2023-46838
Parent vulnerabilities
(Appears in the following advisories)
- collector/oss-sec
- source/oss-sec
- alias/CVE-2023-46838
- agent/first-publish-date
- agent/title
- agent/type
- agent/weakness
- agent/severity
- collector/mitre-cve
- source/MITRE
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/last-modified-date
- collector/nvd-cve
- collector/launchpad-cve
- source/Launchpad
- agent/remedy
- agent/author
- agent/description
- agent/event
- collector/epss-latest
- source/FIRST
- agent/epss
- agent/references
- agent/tags
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/usn-cve
- source/Ubuntu
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/4.14
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/38
- version/fedoraproject fedora/39
- package-manager/debian
- package-manager/ubuntu