Log in Start free

Vulnerability · Published Jan 29, 2024 · Assigned by XEN

CVE-2023-46838Linux: netback processing of zero-length transmit fragment

High 7.5

In plain English

A high-severity null pointer dereference in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 68% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.2%top 32.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.21linux-lts6.6.13-r1ALPINE-CVE-2023-46838
Alpine:v3.22linux-lts6.6.13-r1ALPINE-CVE-2023-46838
Alpine:v3.23linux-lts6.6.13-r1ALPINE-CVE-2023-46838
Debian:12linux6.1.76-1DEBIAN-CVE-2023-46838
Debian:13linux6.6.15-1DEBIAN-CVE-2023-46838
Debian:14linux6.6.15-1DEBIAN-CVE-2023-46838
Ubuntu:22.04:LTSlinux5.15.0-102.112USN-6725-1
Ubuntu:22.04:LTSlinux5.15.0-102.112UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-aws5.15.0-1057.63UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-aws5.15.0-1057.63USN-6725-2
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-aws-6.56.5.0-1017.17~22.04.2UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-aws-6.56.5.0-1017.17~22.04.2USN-6724-2
Ubuntu:22.04:LTSlinux-azure5.15.0-1060.69USN-6725-1
Ubuntu:22.04:LTSlinux-azure5.15.0-1060.69UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-azure-6.56.5.0-1018.19~22.04.2USN-6724-1
Ubuntu:22.04:LTSlinux-azure-6.56.5.0-1018.19~22.04.2UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1060.69.1UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1060.69.1USN-6725-1
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-gcp5.15.0-1055.63USN-6725-1
Ubuntu:22.04:LTSlinux-gcp5.15.0-1055.63UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-gcp-6.56.5.0-1017.17~22.04.1UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-gcp-6.56.5.0-1017.17~22.04.1USN-6724-1
Ubuntu:22.04:LTSlinux-gke5.15.0-1054.59UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-gke5.15.0-1054.59USN-6725-1
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1040.46UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1040.46USN-6725-1
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-hwe-6.56.5.0-27.28~22.04.1UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-hwe-6.56.5.0-27.28~22.04.1USN-6724-1
Ubuntu:22.04:LTSlinux-ibm5.15.0-1050.53USN-6725-1
Ubuntu:22.04:LTSlinux-ibm5.15.0-1050.53UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1052.58USN-6725-1
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1052.58UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-kvm5.15.0-1054.59USN-6725-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1054.59UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-102.112USN-6725-1
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-102.112UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.56.5.0-27.28.1~22.04.1USN-6724-1
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.56.5.0-27.28.1~22.04.1UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1048.48UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1048.48USN-6725-1
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-nvidia-6.56.5.0-1014.14UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1025.25UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1012.12UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-oem-6.16.1.0-1035.35UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-oem-6.16.1.0-1035.35USN-6688-1
Ubuntu:22.04:LTSlinux-oem-6.56.5.0-1019.20USN-6724-1
Ubuntu:22.04:LTSlinux-oem-6.56.5.0-1019.20UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-oracle5.15.0-1055.61USN-6725-1
Ubuntu:22.04:LTSlinux-oracle5.15.0-1055.61UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-oracle-6.56.5.0-1020.20~22.04.1USN-6724-1
Ubuntu:22.04:LTSlinux-oracle-6.56.5.0-1020.20~22.04.1UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-raspi5.15.0-1050.53USN-6725-1
Ubuntu:22.04:LTSlinux-raspi5.15.0-1050.53UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-riscv-6.56.5.0-27.28.1~22.04.1UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-starfive-6.56.5.0-1011.12~22.04.1USN-6724-1
Ubuntu:22.04:LTSlinux-starfive-6.56.5.0-1011.12~22.04.1UBUNTU-CVE-2023-46838
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1030.34UBUNTU-CVE-2023-46838

Affected products (as reported)

VendorProductVersions
Linux Linux see references

Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References