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Vulnerability · Published Dec 30, 2025 · Assigned by Linux

CVE-2023-54220serial: 8250: Fix oops for port->pm on uart_change_pm()

High 7.8

In plain English

A high-severity security flaw 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 5% 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 95.4% 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: serial: 8250: Fix oops for port->pm on uart_change_pm() Unloading a hardware specific 8250 driver can produce error "Unable to handle kernel paging request at virtual address" about ten seconds after unloading the driver. This happens on uart_hangup() calling uart_change_pm(). Turns out commit 04e82793f068 ("serial: 8250: Reinit port->pm on port specific driver unbind") was only a partial fix. If the hardware specific driver has initialized port->pm function, we need to clear port->pm too. Just reinitializing port->ops does not do this. Otherwise serial8250_pm() will call port->pm() instead of serial8250_do_pm().

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.52-1DEBIAN-CVE-2023-54220
Debian:13linux6.4.13-1DEBIAN-CVE-2023-54220
Debian:14linux6.4.13-1DEBIAN-CVE-2023-54220
Ubuntu:22.04:LTSlinux5.15.0-91.101UBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-aws5.15.0-1051.56UBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-azure5.15.0-1053.61UBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-54220
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1053.61.1UBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-gcp5.15.0-1048.56UBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-54220
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-gke5.15.0-1048.53UBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1034.40UBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-54220
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-ibm5.15.0-1044.47UBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1046.52UBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-kvm5.15.0-1048.53UBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-91.101UBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-54220
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1042.42UBUNTU-CVE-2023-54220
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1020.20UBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1007.7UBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-54220
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-54220
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-oracle5.15.0-1049.55UBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-raspi5.15.0-1044.47UBUNTU-CVE-2023-54220
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-54220
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-54220
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-54220
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-54220
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1027.31UBUNTU-CVE-2023-54220

Affected products (as reported)

VendorProductVersions
Linux Linux 490bf37eaabb0a857ed1ae8e75d8854e41662f1c – before 66f3e55960698c874b0598277913b478ecd29573c9e080c3005fd183c56ff8f4d75edb5da0765d2c – before 720a297b334e85d34099e83d1f375b92c3efedd6d5cd2928d31042a7c0a01464f9a8d95be736421d – before b653289ca6460a6552c8590b75dfa84a0140a46b2c86a1305c1406f45ea780d06953c484ea1d9e6e – before bd70d0b28010d560a8be96b44fea86fe2ba016ae1ba5594739d858e524ff0f398ee1ebfe0a8b9d41 – before 18e27df4f2b4e257c317ba8076f31a888f6cc64baf4d6dbb1a92ea424ad1ba1d0c88c7fa2345d872 – before 0c05493341d6f2097f75f0a5dbb7b53a9e8c5f6c04e82793f068d2f0ffe62fcea03d007a8cdc16a7 – before 375806616f8c772c33d40e112530887b37c1a81604e82793f068d2f0ffe62fcea03d007a8cdc16a7 – before dfe2aeb226fd5e19b0ee795f4f6ed8bc494c1534
Linux Linux 6.4

References