CVE-2025-39724 — Race Condition in Linux
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 95.97%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedSep 5
Latest updateMar 25
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…
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6
Affected Packages3 packages
▶CVEListV5linux/linuxc49436b657d0a56a6ad90d14a7c3041add7cf64d — 0b882f00655afefbc7729c6b5aec86f7a5473a3d+10
Also affects: Debian Linux 11.0
Patches
🔴Vulnerability Details
3OSV▶
CVE-2025-39724: 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 t↗2025-09-05
GHSA▶
GHSA-jx3q-xcpc-36h3: 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↗2025-09-05