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Vulnerability · Published Mar 29, 2024 · Assigned by Linux

CVE-2023-52629sh: push-switch: Reorder cleanup operations to avoid use-after-free bug

High 8.4

In plain English

A high-severity use-after-free 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 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.4High
Exploit odds (30 days)0.3%top 83.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: sh: push-switch: Reorder cleanup operations to avoid use-after-free bug The original code puts flush_work() before timer_shutdown_sync() in switch_drv_remove(). Although we use flush_work() to stop the worker, it could be rescheduled in switch_timer(). As a result, a use-after-free bug can occur. The details are shown below: (cpu 0) | (cpu 1) switch_drv_remove() | flush_work() | ... | switch_timer // timer | schedule_work(&psw->work) timer_shutdown_sync() | ... | switch_work_handler // worker kfree(psw) // free | | psw->state = 0 // use This patch puts timer_shutdown_sync() before flush_work() to mitigate the bugs. As a result, the worker and timer will be stopped safely before the deallocate operations.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.190-1DEBIAN-CVE-2023-52629
Debian:13linux6.5.6-1DEBIAN-CVE-2023-52629
Debian:14linux6.5.6-1DEBIAN-CVE-2023-52629
Ubuntu:22.04:LTSlinux5.15.0-119.129UBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux5.15.0-119.129USN-6974-1
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-aws5.15.0-1068.74USN-6974-1
Ubuntu:22.04:LTSlinux-aws5.15.0-1068.74UBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-azure5.15.0-1071.80USN-6974-1
Ubuntu:22.04:LTSlinux-azure5.15.0-1071.80UBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1071.80.1UBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1071.80.1USN-6974-1
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-gcp5.15.0-1067.75UBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-gcp5.15.0-1067.75USN-6974-1
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-gke5.15.0-1065.71UBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-gke5.15.0-1065.71USN-6974-1
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1051.58USN-6974-1
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1051.58UBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-ibm5.15.0-1061.64UBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-ibm5.15.0-1061.64USN-6974-1
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1063.69UBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1063.69USN-6974-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1065.70UBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-kvm5.15.0-1065.70USN-6974-1
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-119.129UBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-119.129USN-6974-1
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1063.64UBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1063.64USN-6974-1
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-nvidia-6.56.5.0-1014.14UBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1028.28UBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1016.16UBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-oracle5.15.0-1066.72USN-6974-1
Ubuntu:22.04:LTSlinux-oracle5.15.0-1066.72UBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-raspi5.15.0-1061.64USN-6974-1
Ubuntu:22.04:LTSlinux-raspi5.15.0-1061.64UBUNTU-CVE-2023-52629
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1035.39UBUNTU-CVE-2023-52629
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1035.39USN-7019-1

Affected products (as reported)

VendorProductVersions
Linux Linux 9f5e8eee5cfe1328660c71812d87c2a67bda389f – before ff635d1f143b55fa005e9e43b16e6d8f677e90a59f5e8eee5cfe1328660c71812d87c2a67bda389f – before 610dbd8ac271aa36080aac50b928d700ee3fe4de9f5e8eee5cfe1328660c71812d87c2a67bda389f – before 246f80a0b17f8f582b2c0996db02998239057c65
Linux Linux 2.6.20

Weakness: CWE-416 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References