CVE-2020-29569
Description
An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback.
Risk Information
Base Score
8.8
MODERATE
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS Score
Exploitation Probability
0.07
Associated Vulnerability
| Vulnerability | OS Platform |
|---|---|
| Kernel-uek update (ELSA-2021-9005) kernel-uek-4.14.35-2025.404.1.1.el7uek.x86_64.rpm | Linux |
| Kernel-uek-debug update (ELSA-2021-9005) kernel-uek-debug-4.14.35-2025.404.1.1.el7uek.x86_64.rpm | Linux |
| Kernel-uek-debug-devel update (ELSA-2021-9005) kernel-uek-debug-devel-4.14.35-2025.404.1.1.el7uek.x86_64.rpm | Linux |
| Kernel-uek-devel update (ELSA-2021-9005) kernel-uek-devel-4.14.35-2025.404.1.1.el7uek.x86_64.rpm | Linux |
| Kernel-uek-doc update (ELSA-2021-9005) kernel-uek-doc-4.14.35-2025.404.1.1.el7uek.noarch.rpm | Linux |
| Kernel-uek-tools update (ELSA-2021-9005) kernel-uek-tools-4.14.35-2025.404.1.1.el7uek.x86_64.rpm | Linux |
| Kernel-uek update (ELSA-2021-9006) kernel-uek-5.4.17-2036.102.0.2.el8uek.x86_64.rpm | Linux |
| Kernel-uek-debug update (ELSA-2021-9006) kernel-uek-debug-5.4.17-2036.102.0.2.el8uek.x86_64.rpm | Linux |
| Kernel-uek-debug-devel update (ELSA-2021-9006) kernel-uek-debug-devel-5.4.17-2036.102.0.2.el8uek.x86_64.rpm | Linux |
| Kernel-uek-devel update (ELSA-2021-9006) kernel-uek-devel-5.4.17-2036.102.0.2.el8uek.x86_64.rpm | Linux |
| Kernel-uek-doc update (ELSA-2021-9006) kernel-uek-doc-5.4.17-2036.102.0.2.el8uek.noarch.rpm | Linux |
| Kernel-uek-container update (ELSA-2021-9007) kernel-uek-container-5.4.17-2036.102.0.2.el8.x86_64.rpm | Linux |
| Kernel-uek-container-debug update (ELSA-2021-9007) kernel-uek-container-debug-5.4.17-2036.102.0.2.el8.x86_64.rpm | Linux |
| Kernel-uek update (ELSA-2021-9009) kernel-uek-4.1.12-124.46.4.1.el6uek.x86_64.rpm | Linux |
| Kernel-uek-debug update (ELSA-2021-9009) kernel-uek-debug-4.1.12-124.46.4.1.el6uek.x86_64.rpm | Linux |
| Kernel-uek-debug-devel update (ELSA-2021-9009) kernel-uek-debug-devel-4.1.12-124.46.4.1.el6uek.x86_64.rpm | Linux |
| Kernel-uek-devel update (ELSA-2021-9009) kernel-uek-devel-4.1.12-124.46.4.1.el6uek.x86_64.rpm | Linux |
| Kernel-uek-doc update (ELSA-2021-9009) kernel-uek-doc-4.1.12-124.46.4.1.el6uek.noarch.rpm | Linux |
| Kernel-uek-firmware update (ELSA-2021-9009) kernel-uek-firmware-4.1.12-124.46.4.1.el6uek.noarch.rpm | Linux |
| Kernel-uek update (ELSA-2021-9009) kernel-uek-4.1.12-124.46.4.1.el7uek.x86_64.rpm | Linux |
| Kernel-uek-debug update (ELSA-2021-9009) kernel-uek-debug-4.1.12-124.46.4.1.el7uek.x86_64.rpm | Linux |
| Kernel-uek-debug-devel update (ELSA-2021-9009) kernel-uek-debug-devel-4.1.12-124.46.4.1.el7uek.x86_64.rpm | Linux |
| Kernel-uek-devel update (ELSA-2021-9009) kernel-uek-devel-4.1.12-124.46.4.1.el7uek.x86_64.rpm | Linux |
| Kernel-uek-doc update (ELSA-2021-9009) kernel-uek-doc-4.1.12-124.46.4.1.el7uek.noarch.rpm | Linux |
| Kernel-uek-firmware update (ELSA-2021-9009) kernel-uek-firmware-4.1.12-124.46.4.1.el7uek.noarch.rpm | Linux |
| SUSE-SU-2021:0348-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-azure-4.12.14-16.44.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0348-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-azure-base-4.12.14-16.44.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0348-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-azure-base-debuginfo-4.12.14-16.44.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0348-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-azure-debuginfo-4.12.14-16.44.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0348-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-azure-debugsource-4.12.14-16.44.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0348-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-azure-devel-4.12.14-16.44.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0348-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-devel-azure-4.12.14-16.44.1.noarch.rpm | Linux |
| SUSE-SU-2021:0348-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-source-azure-4.12.14-16.44.1.noarch.rpm | Linux |
| SUSE-SU-2021:0348-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-syms-azure-4.12.14-16.44.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0353-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-default-4.12.14-122.60.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0353-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-default-base-4.12.14-122.60.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0353-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-default-base-debuginfo-4.12.14-122.60.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0353-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-default-debuginfo-4.12.14-122.60.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0353-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-default-debugsource-4.12.14-122.60.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0353-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-default-devel-4.12.14-122.60.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0353-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-default-devel-debuginfo-4.12.14-122.60.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0353-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-devel-4.12.14-122.60.1.noarch.rpm | Linux |
| SUSE-SU-2021:0353-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-macros-4.12.14-122.60.1.noarch.rpm | Linux |
| SUSE-SU-2021:0353-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-source-4.12.14-122.60.1.noarch.rpm | Linux |
| SUSE-SU-2021:0353-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-syms-4.12.14-122.60.1.x86_64.rpm | Linux |
| Linux kernel (USN-4749-1) linux-image-gcp_4.15.0.1093.94_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-gke_4.15.0.1079.83_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-gke_4.15.0.1093.94_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-kvm_4.15.0.1085.81_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-oem_4.15.0.136.132_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-azure_4.15.0.1108.99_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-oracle_4.15.0.1065.53_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-aws-hwe_4.15.0.1094.87_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-generic_4.15.0.136.123_i386.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-generic_4.15.0.136.123_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-virtual_4.15.0.136.123_i386.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-virtual_4.15.0.136.123_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-dell300x_4.15.0.1012.14_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-gke-4.15_4.15.0.1079.83_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-lowlatency_4.15.0.136.123_i386.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-lowlatency_4.15.0.136.123_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-aws-lts-18.04_4.15.0.1094.97_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-gcp-lts-18.04_4.15.0.1093.111_amd64.deb | Linux |
| Linux kernel (USN-4876-1) linux-image-aws_4.4.0.1123.128_amd64.deb | Linux |
| Linux kernel (USN-4876-1) linux-image-kvm_4.4.0.1089.87_amd64.deb | Linux |
| Linux kernel (USN-4876-1) linux-image-generic_4.4.0.204.210_i386.deb | Linux |
| Linux kernel (USN-4876-1) linux-image-generic_4.4.0.204.210_amd64.deb | Linux |
| Linux kernel (USN-4876-1) linux-image-virtual_4.4.0.204.210_i386.deb | Linux |
| Linux kernel (USN-4876-1) linux-image-virtual_4.4.0.204.210_amd64.deb | Linux |
| Linux kernel (USN-4876-1) linux-image-lowlatency_4.4.0.204.210_i386.deb | Linux |
| Linux kernel (USN-4876-1) linux-image-lowlatency_4.4.0.204.210_amd64.deb | Linux |
| Linux kernel (USN-4876-1) linux-image-4.4.0-1089-kvm_4.4.0-1089.98_amd64.deb | Linux |
| Linux kernel (USN-4876-1) linux-image-4.4.0-1123-aws_4.4.0-1123.137_amd64.deb | Linux |
| Linux kernel (USN-4876-1) linux-image-4.4.0-204-generic_4.4.0-204.236_i386.deb | Linux |
| Linux kernel (USN-4876-1) linux-image-4.4.0-204-generic_4.4.0-204.236_amd64.deb | Linux |
| Linux kernel (USN-4876-1) linux-image-4.4.0-204-lowlatency_4.4.0-204.236_i386.deb | Linux |
| Linux kernel (USN-4876-1) linux-image-4.4.0-204-lowlatency_4.4.0-204.236_amd64.deb | Linux |
| Kernel-uek update (ELSA-2021-9037) kernel-uek-5.4.17-2036.103.3.el8uek.x86_64.rpm | Linux |
| Kernel-uek-debug update (ELSA-2021-9037) kernel-uek-debug-5.4.17-2036.103.3.el8uek.x86_64.rpm | Linux |
| Kernel-uek-debug-devel update (ELSA-2021-9037) kernel-uek-debug-devel-5.4.17-2036.103.3.el8uek.x86_64.rpm | Linux |
| Kernel-uek-devel update (ELSA-2021-9037) kernel-uek-devel-5.4.17-2036.103.3.el8uek.x86_64.rpm | Linux |
| Kernel-uek-doc update (ELSA-2021-9037) kernel-uek-doc-5.4.17-2036.103.3.el8uek.noarch.rpm | Linux |
| Kernel-uek-container update (ELSA-2021-9038) kernel-uek-container-5.4.17-2036.103.3.el8.x86_64.rpm | Linux |
| Kernel-uek-container-debug update (ELSA-2021-9038) kernel-uek-container-debug-5.4.17-2036.103.3.el8.x86_64.rpm | Linux |
| Kernel-uek update (ELSA-2021-9140) kernel-uek-5.4.17-2102.200.13.el8uek.x86_64.rpm | Linux |
| Kernel-uek-debug update (ELSA-2021-9140) kernel-uek-debug-5.4.17-2102.200.13.el8uek.x86_64.rpm | Linux |
| Kernel-uek-debug-devel update (ELSA-2021-9140) kernel-uek-debug-devel-5.4.17-2102.200.13.el8uek.x86_64.rpm | Linux |
| Kernel-uek-devel update (ELSA-2021-9140) kernel-uek-devel-5.4.17-2102.200.13.el8uek.x86_64.rpm | Linux |
| Kernel-uek-doc update (ELSA-2021-9140) kernel-uek-doc-5.4.17-2102.200.13.el8uek.noarch.rpm | Linux |
| Kernel-uek-container update (ELSA-2021-9141) kernel-uek-container-5.4.17-2102.200.13.el8.x86_64.rpm | Linux |
| Kernel-uek-container-debug update (ELSA-2021-9141) kernel-uek-container-debug-5.4.17-2102.200.13.el8.x86_64.rpm | Linux |
| Linux kernel (USN-4749-1) linux-image-4.15.0-1079-gke_4.15.0-1079.84_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-4.15.0-1085-kvm_4.15.0-1085.87_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-4.15.0-1093-gcp_4.15.0-1093.106_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-4.15.0-1094-aws_4.15.0-1094.101_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-4.15.0-1108-azure_4.15.0-1108.120_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-4.15.0-1065-oracle_4.15.0-1065.73_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-4.15.0-136-generic_4.15.0-136.140_i386.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-4.15.0-136-generic_4.15.0-136.140_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-4.15.0-1012-dell300x_4.15.0-1012.16_amd64.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-4.15.0-136-lowlatency_4.15.0-136.140_i386.deb | Linux |
| Linux kernel (USN-4749-1) linux-image-4.15.0-136-lowlatency_4.15.0-136.140_amd64.deb | Linux |
| Linux kernel (USN-4750-1) linux-image-5.4.0-1033-kvm_5.4.0-1033.34_amd64.deb | Linux |
| Linux kernel (USN-4750-1) linux-image-5.4.0-1036-gke_5.4.0-1036.38~18.04.1_amd64.deb | Linux |
| Linux kernel (USN-4750-1) linux-image-5.4.0-1037-gcp_5.4.0-1037.40_amd64.deb | Linux |
| Linux kernel (USN-4750-1) linux-image-5.4.0-1037-gcp_5.4.0-1037.40~18.04.1_amd64.deb | Linux |
| Linux kernel (USN-4750-1) linux-image-5.4.0-1038-aws_5.4.0-1038.40_amd64.deb | Linux |
| Linux kernel (USN-4750-1) linux-image-5.4.0-1038-aws_5.4.0-1038.40~18.04.1_amd64.deb | Linux |
| Linux kernel (USN-4750-1) linux-image-5.4.0-1010-gkeop_5.4.0-1010.11_amd64.deb | Linux |
| Linux kernel (USN-4750-1) linux-image-5.4.0-1010-gkeop_5.4.0-1010.11~18.04.1_amd64.deb | Linux |
| Linux kernel (USN-4750-1) linux-image-5.4.0-1040-azure_5.4.0-1040.42_amd64.deb | Linux |
| Linux kernel (USN-4750-1) linux-image-5.4.0-1040-azure_5.4.0-1040.42~18.04.1_amd64.deb | Linux |
| Linux kernel (USN-4750-1) linux-image-5.4.0-66-generic_5.4.0-66.74_amd64.deb | Linux |
| Linux kernel (USN-4750-1) linux-image-5.4.0-66-generic_5.4.0-66.74~18.04.2_i386.deb | Linux |
| Linux kernel (USN-4750-1) linux-image-5.4.0-66-generic_5.4.0-66.74~18.04.2_amd64.deb | Linux |
| Linux kernel (USN-4750-1) linux-image-5.4.0-1038-oracle_5.4.0-1038.41_amd64.deb | Linux |
| Linux kernel (USN-4750-1) linux-image-5.4.0-1038-oracle_5.4.0-1038.41~18.04.1_amd64.deb | Linux |
| Linux kernel (USN-4750-1) linux-image-5.4.0-66-lowlatency_5.4.0-66.74_amd64.deb | Linux |
| Linux kernel (USN-4750-1) linux-image-5.4.0-66-lowlatency_5.4.0-66.74~18.04.2_i386.deb | Linux |
| Linux kernel (USN-4750-1) linux-image-5.4.0-66-lowlatency_5.4.0-66.74~18.04.2_amd64.deb | Linux |
| Linux kernel (USN-4751-1) linux-image-5.8.0-44-generic_5.8.0-44.50~20.04.1_amd64.deb | Linux |
| Linux kernel (USN-4751-1) linux-image-5.8.0-44-lowlatency_5.8.0-44.50~20.04.1_amd64.deb | Linux |
| kernel Security Update (ALAS-2021-1588) kernel-livepatch-4.14.214-160.339-1.0-0.amzn2.x86_64.rpm | Linux |
Patch Details
No records foundReferences
https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234