7.8
CWE
416
Advisory Published
Updated

CVE-2023-4622: Use-after-free in Linux kernel's af_unix component

First published: Wed Sep 06 2023(Updated: )

A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local privilege escalation. The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that is being released by garbage collection, resulting in use-after-free. We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c.

Credit: cve-coordination@google.com cve-coordination@google.com cve-coordination@google.com

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel<=6.4.15
Debian Debian Linux=12.0
Linux Linux kernel>=4.2<6.1.47
Debian Debian Linux=10.0
Google Android
IBM QRadar SIEM<=7.5 - 7.5.0 UP8 IF01
redhat/Kernel<6.4.12
6.4.12
ubuntu/linux<4.15.0-219.230
4.15.0-219.230
ubuntu/linux<5.4.0-165.182
5.4.0-165.182
ubuntu/linux<5.15.0-87.97
5.15.0-87.97
ubuntu/linux<6.2.0-35.35
6.2.0-35.35
ubuntu/linux<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux<4.4.0-246.280
4.4.0-246.280
ubuntu/linux-allwinner-5.19<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-aws<4.15.0-1162.175
4.15.0-1162.175
ubuntu/linux-aws<5.4.0-1112.121
5.4.0-1112.121
ubuntu/linux-aws<5.15.0-1048.53
5.15.0-1048.53
ubuntu/linux-aws<6.2.0-1014.14
6.2.0-1014.14
ubuntu/linux-aws<4.4.0-1124.130
4.4.0-1124.130
ubuntu/linux-aws<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-aws<4.4.0-1162.177
4.4.0-1162.177
ubuntu/linux-aws-5.15<5.15.0-1048.53~20.04.1
5.15.0-1048.53~20.04.1
ubuntu/linux-aws-5.15<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-aws-5.4<5.4.0-1112.121~18.04.2
5.4.0-1112.121~18.04.2
ubuntu/linux-aws-5.4<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-aws-6.2<6.2.0-1014.14~22.04.1
6.2.0-1014.14~22.04.1
ubuntu/linux-aws-6.2<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-aws-6.5<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-aws-fips<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-aws-hwe<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-aws-hwe<4.15.0-1162.175~16.04.1
4.15.0-1162.175~16.04.1
ubuntu/linux-azure<5.4.0-1118.125
5.4.0-1118.125
ubuntu/linux-azure<5.15.0-1050.57
5.15.0-1050.57
ubuntu/linux-azure<6.2.0-1015.15
6.2.0-1015.15
ubuntu/linux-azure<4.15.0-1171.186~14.04.1
4.15.0-1171.186~14.04.1
ubuntu/linux-azure<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-azure<4.15.0-1171.186~16.04.1
4.15.0-1171.186~16.04.1
ubuntu/linux-azure-4.15<4.15.0-1171.186
4.15.0-1171.186
ubuntu/linux-azure-4.15<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-azure-5.15<5.15.0-1050.57~20.04.1
5.15.0-1050.57~20.04.1
ubuntu/linux-azure-5.15<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-azure-5.4<5.4.0-1118.125~18.04.1
5.4.0-1118.125~18.04.1
ubuntu/linux-azure-5.4<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-azure-6.2<6.2.0-1015.15~22.04.1
6.2.0-1015.15~22.04.1
ubuntu/linux-azure-6.2<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-azure-6.5<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-azure-fde<5.15.0-1050.57.1
5.15.0-1050.57.1
ubuntu/linux-azure-fde<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-azure-fde-5.15<5.15.0-1050.57~20.04.1.1
5.15.0-1050.57~20.04.1.1
ubuntu/linux-azure-fde-5.15<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-azure-fde-5.19<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-azure-fde-6.2<6.2.0-1015.15~22.04.1.1
6.2.0-1015.15~22.04.1.1
ubuntu/linux-azure-fde-6.2<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-azure-fips<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-bluefield<5.4.0-1073.79
5.4.0-1073.79
ubuntu/linux-bluefield<5.15.0-1028.30
5.15.0-1028.30
ubuntu/linux-bluefield<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-fips<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-gcp<5.4.0-1116.125
5.4.0-1116.125
ubuntu/linux-gcp<5.15.0-1045.53
5.15.0-1045.53
ubuntu/linux-gcp<6.2.0-1017.19
6.2.0-1017.19
ubuntu/linux-gcp<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-gcp<4.15.0-1156.173~16.04.1
4.15.0-1156.173~16.04.1
ubuntu/linux-gcp-4.15<4.15.0-1156.173
4.15.0-1156.173
ubuntu/linux-gcp-4.15<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-gcp-5.15<5.15.0-1045.53~20.04.2
5.15.0-1045.53~20.04.2
ubuntu/linux-gcp-5.15<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-gcp-5.19<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-gcp-5.4<5.4.0-1116.125~18.04.1
5.4.0-1116.125~18.04.1
ubuntu/linux-gcp-5.4<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-gcp-6.2<6.2.0-1017.19~22.04.1
6.2.0-1017.19~22.04.1
ubuntu/linux-gcp-6.5<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-gcp-fips<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-gke<5.15.0-1045.50
5.15.0-1045.50
ubuntu/linux-gke<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-gkeop<5.4.0-1079.83
5.4.0-1079.83
ubuntu/linux-gkeop<5.15.0-1031.37
5.15.0-1031.37
ubuntu/linux-gkeop<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-gkeop-5.15<5.15.0-1031.37~20.04.1
5.15.0-1031.37~20.04.1
ubuntu/linux-gkeop-5.15<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-hwe<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-hwe<4.15.0-219.230~16.04.1
4.15.0-219.230~16.04.1
ubuntu/linux-hwe-5.15<5.15.0-87.97~20.04.1
5.15.0-87.97~20.04.1
ubuntu/linux-hwe-5.15<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-hwe-5.4<5.4.0-165.182~18.04.1
5.4.0-165.182~18.04.1
ubuntu/linux-hwe-5.4<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-hwe-6.2<6.2.0-35.35~22.04.1
6.2.0-35.35~22.04.1
ubuntu/linux-hwe-6.2<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-hwe-6.5<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-ibm<5.4.0-1059.64
5.4.0-1059.64
ubuntu/linux-ibm<5.15.0-1041.44
5.15.0-1041.44
ubuntu/linux-ibm<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-ibm-5.15<5.15.0-1041.44~20.04.1
5.15.0-1041.44~20.04.1
ubuntu/linux-ibm-5.15<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-ibm-5.4<5.4.0-1059.64~18.04.1
5.4.0-1059.64~18.04.1
ubuntu/linux-ibm-5.4<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-intel<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-intel-iotg<5.15.0-1043.49
5.15.0-1043.49
ubuntu/linux-intel-iotg<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-intel-iotg-5.15<5.15.0-1043.49~20.04.1
5.15.0-1043.49~20.04.1
ubuntu/linux-intel-iotg-5.15<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-iot<5.4.0-1024.25
5.4.0-1024.25
ubuntu/linux-iot<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-kvm<4.15.0-1146.151
4.15.0-1146.151
ubuntu/linux-kvm<5.4.0-1101.107
5.4.0-1101.107
ubuntu/linux-kvm<5.15.0-1045.50
5.15.0-1045.50
ubuntu/linux-kvm<6.2.0-1015.15
6.2.0-1015.15
ubuntu/linux-kvm<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-kvm<4.4.0-1125.135
4.4.0-1125.135
ubuntu/linux-laptop<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-lowlatency<5.15.0-87.96
5.15.0-87.96
ubuntu/linux-lowlatency<6.2.0-1015.15
6.2.0-1015.15
ubuntu/linux-lowlatency<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-lowlatency-hwe-5.15<5.15.0-87.96~20.04.1
5.15.0-87.96~20.04.1
ubuntu/linux-lowlatency-hwe-5.15<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-lowlatency-hwe-5.19<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-lowlatency-hwe-6.2<6.2.0-1015.15~22.04.1
6.2.0-1015.15~22.04.1
ubuntu/linux-lowlatency-hwe-6.2<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-lowlatency-hwe-6.5<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-lts-xenial<4.4.0-246.280~14.04.1
4.4.0-246.280~14.04.1
ubuntu/linux-lts-xenial<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-nvidia<5.15.0-1039.39
5.15.0-1039.39
ubuntu/linux-nvidia<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-nvidia-6.2<6.2.0-1011.11
6.2.0-1011.11
ubuntu/linux-nvidia-6.2<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-nvidia-6.5<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-oem-5.17<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-oem-6.0<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-oem-6.1<6.1.0-1023.23
6.1.0-1023.23
ubuntu/linux-oem-6.1<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-oem-6.5<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-oem-6.8<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-oracle<4.15.0-1125.136
4.15.0-1125.136
ubuntu/linux-oracle<5.4.0-1111.120
5.4.0-1111.120
ubuntu/linux-oracle<5.15.0-1046.52
5.15.0-1046.52
ubuntu/linux-oracle<6.2.0-1014.14
6.2.0-1014.14
ubuntu/linux-oracle<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-oracle<4.15.0-1125.136~16.04.1
4.15.0-1125.136~16.04.1
ubuntu/linux-oracle-5.15<5.15.0-1046.52~20.04.1
5.15.0-1046.52~20.04.1
ubuntu/linux-oracle-5.15<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-oracle-5.4<5.4.0-1111.120~18.04.1
5.4.0-1111.120~18.04.1
ubuntu/linux-oracle-5.4<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-oracle-6.5<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-raspi<5.4.0-1096.107
5.4.0-1096.107
ubuntu/linux-raspi<5.15.0-1041.44
5.15.0-1041.44
ubuntu/linux-raspi<6.2.0-1015.17
6.2.0-1015.17
ubuntu/linux-raspi<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-raspi-5.4<5.4.0-1096.107~18.04.1
5.4.0-1096.107~18.04.1
ubuntu/linux-raspi-5.4<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-riscv<6.2.0-35.35.1
6.2.0-35.35.1
ubuntu/linux-riscv<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-riscv-5.15<5.15.0-1044.48~20.04.1
5.15.0-1044.48~20.04.1
ubuntu/linux-riscv-5.15<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-riscv-6.5<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-starfive<6.2.0-1007.8
6.2.0-1007.8
ubuntu/linux-starfive<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-starfive-6.2<6.2.0-1007.8~22.04.1
6.2.0-1007.8~22.04.1
ubuntu/linux-starfive-6.2<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-starfive-6.5<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
ubuntu/linux-xilinx-zynqmp<5.4.0-1032.36
5.4.0-1032.36
ubuntu/linux-xilinx-zynqmp<5.15.0-1025.29
5.15.0-1025.29
ubuntu/linux-xilinx-zynqmp<6.5~<5.4.255<5.15.128
6.5~
5.4.255
5.15.128
debian/linux
5.10.218-1
5.10.221-1
6.1.94-1
6.1.99-1
6.9.8-1
6.9.9-1

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Reference Links

Frequently Asked Questions

  • What is CVE-2023-4622?

    CVE-2023-4622 is a use-after-free vulnerability in the Linux kernel's af_unix component that can be exploited to achieve local privilege escalation.

  • What is the severity of CVE-2023-4622?

    The severity of CVE-2023-4622 is high (7.8).

  • How can CVE-2023-4622 be exploited?

    CVE-2023-4622 can be exploited by using the unix_stream_sendpage() function to add data to the last skb in the peer's recv queue without locking the queue, creating a race condition.

  • Which software is affected by CVE-2023-4622?

    The Linux kernel versions up to and including 6.4.15 and Debian Linux version 12.0 are affected by CVE-2023-4622.

  • How can I fix CVE-2023-4622?

    To fix CVE-2023-4622, update the Linux kernel to versions 6.1.52-1 or higher and Debian Linux to version 6.5.3-1 or higher.

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