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CVE-2025-39724— serial: 8250: fix panic due to PSLVERR

EPSS 0.02% · P4
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I. Basic Information for CVE-2025-39724

Vulnerability Information
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Vulnerability Title
serial: 8250: fix panic due to PSLVERR
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: serial: 8250: fix panic due to PSLVERR When the PSLVERR_RESP_EN parameter is set to 1, the device generates an error response if an attempt is made to read an empty RBR (Receive Buffer Register) while the FIFO is enabled. In serial8250_do_startup(), calling serial_port_out(port, UART_LCR, UART_LCR_WLEN8) triggers dw8250_check_lcr(), which invokes dw8250_force_idle() and serial8250_clear_and_reinit_fifos(). The latter function enables the FIFO via serial_out(p, UART_FCR, p->fcr). Execution proceeds to the serial_port_in(port, UART_RX). This satisfies the PSLVERR trigger condition. When another CPU (e.g., using printk()) is accessing the UART (UART is busy), the current CPU fails the check (value & ~UART_LCR_SPAR) == (lcr & ~UART_LCR_SPAR) in dw8250_check_lcr(), causing it to enter dw8250_force_idle(). Put serial_port_out(port, UART_LCR, UART_LCR_WLEN8) under the port->lock to fix this issue. Panic backtrace: [ 0.442336] Oops - unknown exception [#1] [ 0.442343] epc : dw8250_serial_in32+0x1e/0x4a [ 0.442351] ra : serial8250_do_startup+0x2c8/0x88e ... [ 0.442416] console_on_rootfs+0x26/0x70
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于PSLVERR触发条件，可能导致内核崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux c49436b657d0a56a6ad90d14a7c3041add7cf64d ~ 0b882f00655afefbc7729c6b5aec86f7a5473a3d -
LinuxLinux 3.13 -

II. Public POCs for CVE-2025-39724

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III. Intelligence Information for CVE-2025-39724

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Same Patch Batch · Linux · 2025-09-05 · 60 CVEs total

CVE-2025-39706drm/amdkfd: Destroy KFD debugfs after destroy KFD wq
CVE-2025-39725mm/vmscan: fix hwpoisoned large folio handling in shrink_folio_list
CVE-2025-39721crypto: qat - flush misc workqueue during device shutdown
CVE-2025-39720ksmbd: fix refcount leak causing resource not released
CVE-2025-39719iio: imu: bno055: fix OOB access of hw_xlate array
CVE-2025-39722crypto: caam - Prevent crash on suspend with iMX8QM / iMX8ULP
CVE-2025-39710media: venus: Add a check for packet size after reading from shared memory
CVE-2025-39709media: venus: protect against spurious interrupts during probe
CVE-2025-39708media: iris: Fix NULL pointer dereference
CVE-2025-39707drm/amdgpu: check if hubbub is NULL in debugfs/amdgpu_dm_capabilities
CVE-2025-39711media: ivsc: Fix crash at shutdown due to missing mei_cldev_disable() calls
CVE-2025-39705drm/amd/display: fix a Null pointer dereference vulnerability
CVE-2025-39704LoongArch: KVM: Fix stack protector issue in send_ipi_data()
CVE-2025-39703net, hsr: reject HSR frame if skb can't hold tag
CVE-2025-39702ipv6: sr: Fix MAC comparison to be constant-time
CVE-2025-39701ACPI: pfr_update: Fix the driver update version check
CVE-2025-39700mm/damon/ops-common: ignore migration request to invalid nodes
CVE-2025-39699iommu/riscv: prevent NULL deref in iova_to_phys
CVE-2025-39698io_uring/futex: ensure io_futex_wait() cleans up properly on failure
CVE-2025-39697NFS: Fix a race when updating an existing write

Showing top 20 of 60 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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