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Vulnerability · Published May 21, 2024 · Assigned by Linux

CVE-2023-52872tty: n_gsm: fix race condition in status line change on dead connections

High 7.8

In plain English

A high-severity race condition 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 0.2% (higher than 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 92.3% 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: tty: n_gsm: fix race condition in status line change on dead connections gsm_cleanup_mux() cleans up the gsm by closing all DLCIs, stopping all timers, removing the virtual tty devices and clearing the data queues. This procedure, however, may cause subsequent changes of the virtual modem status lines of a DLCI. More data is being added the outgoing data queue and the deleted kick timer is restarted to handle this. At this point many resources have already been removed by the cleanup procedure. Thus, a kernel panic occurs. Fix this by proving in gsm_modem_update() that the cleanup procedure has not been started and the mux is still alive. Note that writing to a virtual tty is already protected by checks against the DLCI specific connection state.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.64-1DEBIAN-CVE-2023-52872
Debian:13linux6.6.8-1DEBIAN-CVE-2023-52872
Debian:14linux6.6.8-1DEBIAN-CVE-2023-52872
Ubuntu:22.04:LTSlinux5.15.0-100.110UBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-aws5.15.0-1056.61UBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-azure5.15.0-1058.66UBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1058.66.1UBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-gcp5.15.0-1053.61UBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-gke5.15.0-1052.57UBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1038.44UBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-ibm5.15.0-1048.51UBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1050.56UBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-kvm5.15.0-1052.57UBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-100.110UBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1046.46UBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-nvidia-6.56.5.0-1014.14UBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1025.25UBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1012.12UBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-oracle5.15.0-1053.59UBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-raspi5.15.0-1048.51UBUNTU-CVE-2023-52872
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-52872
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1030.34UBUNTU-CVE-2023-52872

Affected products (as reported)

VendorProductVersions
Linux Linux dd37f657387853623f20c1b2482afbb9cd8ece33 – before 81a4dd5e6c78f5d8952fa8c9d36565db1fe01444c568f7086c6e771c77aad13d727c70ef70e07243 – before df6cfab66ff2a44bd23ad5dd5309cb3421bb6593c568f7086c6e771c77aad13d727c70ef70e07243 – before 19d34b73234af542cc8a218cf398dee73cdb1890c568f7086c6e771c77aad13d727c70ef70e07243 – before ce4df90333c4fe65acb8b5089fdfe9b955ce976ac568f7086c6e771c77aad13d727c70ef70e07243 – before 3a75b205de43365f80a33b98ec9289785da56243d834aba5f30d9a6f98f4ca1eb07e501f1989331c692e847a8e6607909c4a3f98ab16ccee7849bd115.15.61 – before 5.15.138
Linux Linux 6.0

Weakness: CWE-362 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References