CVE-2023-53176
published 2025-09-15CVE-2023-53176: In the Linux kernel, the following vulnerability has been resolved: serial: 8250: Reinit port->pm on port specific driver unbind When we unbind a serial port…
PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.15%
5.0th percentile
In the Linux kernel, the following vulnerability has been resolved:
serial: 8250: Reinit port->pm on port specific driver unbind
When we unbind a serial port hardware specific 8250 driver, the generic
serial8250 driver takes over the port. After that we see an oops about 10
seconds later. This can produce the following at least on some TI SoCs:
Unhandled fault: imprecise external abort (0x1406)
Internal error: : 1406 [#1] SMP ARM
Turns out that we may still have the serial port hardware specific driver
port->pm in use, and serial8250_pm() tries to call it after the port
specific driver is gone:
serial8250_pm [8250_base] from uart_change_pm+0x54/0x8c [serial_base]
uart_change_pm [serial_base] from uart_hangup+0x154/0x198 [serial_base]
uart_hangup [serial_base] from __tty_hangup.part.0+0x328/0x37c
__tty_hangup.part.0 from disassociate_ctty+0x154/0x20c
disassociate_ctty from do_exit+0x744/0xaac
do_exit from do_group_exit+0x40/0x8c
do_group_exit from __wake_up_parent+0x0/0x1c
Let's fix the issue by calling serial8250_set_defaults() in
serial8250_unregister_port(). This will set the port back to using
the serial8250 default functions, and sets the port->pm to point to
serial8250_pm.
Affected
21 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.37-1 (bookworm) | linux 6.1.37-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= c161afe9759ddcc174d08e7c4f683d08ac9ba86f < 490bf37eaabb0a857ed1ae8e75d8854e41662f1c | 490bf37eaabb0a857ed1ae8e75d8854e41662f1c |
| linux | linux | >= c161afe9759ddcc174d08e7c4f683d08ac9ba86f < c9e080c3005fd183c56ff8f4d75edb5da0765d2c | c9e080c3005fd183c56ff8f4d75edb5da0765d2c |
| linux | linux | >= c161afe9759ddcc174d08e7c4f683d08ac9ba86f < d5cd2928d31042a7c0a01464f9a8d95be736421d | d5cd2928d31042a7c0a01464f9a8d95be736421d |
| linux | linux | >= c161afe9759ddcc174d08e7c4f683d08ac9ba86f < 2c86a1305c1406f45ea780d06953c484ea1d9e6e | 2c86a1305c1406f45ea780d06953c484ea1d9e6e |
| linux | linux | >= c161afe9759ddcc174d08e7c4f683d08ac9ba86f < 1ba5594739d858e524ff0f398ee1ebfe0a8b9d41 | 1ba5594739d858e524ff0f398ee1ebfe0a8b9d41 |
| linux | linux | >= c161afe9759ddcc174d08e7c4f683d08ac9ba86f < af4d6dbb1a92ea424ad1ba1d0c88c7fa2345d872 | af4d6dbb1a92ea424ad1ba1d0c88c7fa2345d872 |
| linux | linux | >= c161afe9759ddcc174d08e7c4f683d08ac9ba86f < 8e596aed5f2f98cf3e6e98d6fe1d689f4a319308 | 8e596aed5f2f98cf3e6e98d6fe1d689f4a319308 |
| linux | linux | >= c161afe9759ddcc174d08e7c4f683d08ac9ba86f < 04e82793f068d2f0ffe62fcea03d007a8cdc16a7 | 04e82793f068d2f0ffe62fcea03d007a8cdc16a7 |
| linux | linux_kernel | < 4.14.316 | 4.14.316 |
| linux | linux_kernel | >= 0 < 5.10.191-1 | 5.10.191-1 |
| linux | linux_kernel | >= 0 < 6.1.37-1 | 6.1.37-1 |
| linux | linux_kernel | >= 0 < 6.3.7-1 | 6.3.7-1 |
| linux | linux_kernel | >= 0 < 6.3.7-1 | 6.3.7-1 |
| linux | linux_kernel | >= 4.15 < 4.19.284 | 4.19.284 |
| linux | linux_kernel | >= 4.20 < 5.4.244 | 5.4.244 |
| linux | linux_kernel | >= 5.11 < 5.15.113 | 5.15.113 |
| linux | linux_kernel | >= 5.16 < 6.1.30 | 6.1.30 |
| linux | linux_kernel | >= 5.5 < 5.10.181 | 5.10.181 |
| linux | linux_kernel | >= 6.2 < 6.3.4 | 6.3.4 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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Red Hat
kernel: serial: 8250: Reinit port->pm on port specific driver unbind
vendor_redhat·2025-09-15·CVSS 5.5
CVE-2023-53176 [MEDIUM] CWE-772 kernel: serial: 8250: Reinit port->pm on port specific driver unbind
kernel: serial: 8250: Reinit port->pm on port specific driver unbind
In the Linux kernel, the following vulnerability has been resolved:
serial: 8250: Reinit port->pm on port specific driver unbind
When we unbind a serial port hardware specific 8250 driver, the generic
serial8250 driver takes over the port. After that we see an oops about 10
seconds later. This can produce the following at least on some TI SoCs:
Unhandled fault: imprecise external abort (0x1406)
Internal error: : 1406 [#1] SMP ARM
Turns out that we may still have the serial port hardware specific driver
port->pm in use, and serial8250_pm() tries to call it after the port
specific driver is gone:
serial8250_pm [8250_base] from uart_change_pm+0x54/0x8c [serial_base]
uart_change_pm [serial_base] from uart_hangup+0x154/0x198
Debian
CVE-2023-53176: linux - In the Linux kernel, the following vulnerability has been resolved: serial: 825...
vendor_debian·2023·CVSS 5.5
CVE-2023-53176 [MEDIUM] CVE-2023-53176: linux - In the Linux kernel, the following vulnerability has been resolved: serial: 825...
In the Linux kernel, the following vulnerability has been resolved: serial: 8250: Reinit port->pm on port specific driver unbind When we unbind a serial port hardware specific 8250 driver, the generic serial8250 driver takes over the port. After that we see an oops about 10 seconds later. This can produce the following at least on some TI SoCs: Unhandled fault: imprecise external abort (0x1406) Internal error: : 1406 [#1] SMP ARM Turns out that we may still have the serial port hardware specific driver port->pm in use, and serial8250_pm() tries to call it after the port specific driver is gone: serial8250_pm [8250_base] from uart_change_pm+0x54/0x8c [serial_base] uart_change_pm [serial_base] from uart_hangup+0x154/0x198 [serial_base] uart_hangup [serial_base] from __tty_hangup.part.0+0x328
GHSA
GHSA-j67r-mf5q-82pc: In the Linux kernel, the following vulnerability has been resolved:
serial: 8250: Reinit port->pm on port specific driver unbind
When we unbind a se
ghsa_unreviewed·2025-09-15
CVE-2023-53176 [MEDIUM] GHSA-j67r-mf5q-82pc: In the Linux kernel, the following vulnerability has been resolved:
serial: 8250: Reinit port->pm on port specific driver unbind
When we unbind a se
In the Linux kernel, the following vulnerability has been resolved:
serial: 8250: Reinit port->pm on port specific driver unbind
When we unbind a serial port hardware specific 8250 driver, the generic
serial8250 driver takes over the port. After that we see an oops about 10
seconds later. This can produce the following at least on some TI SoCs:
Unhandled fault: imprecise external abort (0x1406)
Internal error: : 1406 [#1] SMP ARM
Turns out that we may still have the serial port hardware specific driver
port->pm in use, and serial8250_pm() tries to call it after the port
specific driver is gone:
serial8250_pm [8250_base] from uart_change_pm+0x54/0x8c [serial_base]
uart_change_pm [serial_base] from uart_hangup+0x154/0x198 [serial_base]
uart_hangup [serial_base] from __tty_hangup.part.0+
OSV
CVE-2023-53176: In the Linux kernel, the following vulnerability has been resolved: serial: 8250: Reinit port->pm on port specific driver unbind When we unbind a seri
osv·2025-09-15·CVSS 5.5
CVE-2023-53176 [MEDIUM] CVE-2023-53176: In the Linux kernel, the following vulnerability has been resolved: serial: 8250: Reinit port->pm on port specific driver unbind When we unbind a seri
In the Linux kernel, the following vulnerability has been resolved: serial: 8250: Reinit port->pm on port specific driver unbind When we unbind a serial port hardware specific 8250 driver, the generic serial8250 driver takes over the port. After that we see an oops about 10 seconds later. This can produce the following at least on some TI SoCs: Unhandled fault: imprecise external abort (0x1406) Internal error: : 1406 [#1] SMP ARM Turns out that we may still have the serial port hardware specific driver port->pm in use, and serial8250_pm() tries to call it after the port specific driver is gone: serial8250_pm [8250_base] from uart_change_pm+0x54/0x8c [serial_base] uart_change_pm [serial_base] from uart_hangup+0x154/0x198 [serial_base] uart_hangup [serial_base] from __tty_hangup.part.0+0x328
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/04e82793f068d2f0ffe62fcea03d007a8cdc16a7https://git.kernel.org/stable/c/1ba5594739d858e524ff0f398ee1ebfe0a8b9d41https://git.kernel.org/stable/c/2c86a1305c1406f45ea780d06953c484ea1d9e6ehttps://git.kernel.org/stable/c/490bf37eaabb0a857ed1ae8e75d8854e41662f1chttps://git.kernel.org/stable/c/8e596aed5f2f98cf3e6e98d6fe1d689f4a319308https://git.kernel.org/stable/c/af4d6dbb1a92ea424ad1ba1d0c88c7fa2345d872https://git.kernel.org/stable/c/c9e080c3005fd183c56ff8f4d75edb5da0765d2chttps://git.kernel.org/stable/c/d5cd2928d31042a7c0a01464f9a8d95be736421d
2025-09-15
Published