CVE-2023-54220
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.15%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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().
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.15% probability · 5th percentile
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0c05493341d6f2097f75f0a5dbb7b53a9e8c5f6c
- https://git.kernel.org/stable/c/18e27df4f2b4e257c317ba8076f31a888f6cc64b
- https://git.kernel.org/stable/c/375806616f8c772c33d40e112530887b37c1a816
- https://git.kernel.org/stable/c/66f3e55960698c874b0598277913b478ecd29573
- https://git.kernel.org/stable/c/720a297b334e85d34099e83d1f375b92c3efedd6
- https://git.kernel.org/stable/c/b653289ca6460a6552c8590b75dfa84a0140a46b
- https://git.kernel.org/stable/c/bd70d0b28010d560a8be96b44fea86fe2ba016ae
- https://git.kernel.org/stable/c/dfe2aeb226fd5e19b0ee795f4f6ed8bc494c1534
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.