cbcvebase.
CVE-2023-54287
published 2025-12-30

CVE-2023-54287: In the Linux kernel, the following vulnerability has been resolved: tty: serial: imx: disable Ageing Timer interrupt request irq There maybe pending USR…

PriorityP422medium4.7
EPSS
0.17%
7.1th percentile
In the Linux kernel, the following vulnerability has been resolved: tty: serial: imx: disable Ageing Timer interrupt request irq There maybe pending USR interrupt before requesting irq, however uart_add_one_port has not executed, so there will be kernel panic: [ 0.795668] Unable to handle kernel NULL pointer dereference at virtual addre ss 0000000000000080 [ 0.802701] Mem abort info: [ 0.805367] ESR = 0x0000000096000004 [ 0.808950] EC = 0x25: DABT (current EL), IL = 32 bits [ 0.814033] SET = 0, FnV = 0 [ 0.816950] EA = 0, S1PTW = 0 [ 0.819950] FSC = 0x04: level 0 translation fault [ 0.824617] Data abort info: [ 0.827367] ISV = 0, ISS = 0x00000004 [ 0.831033] CM = 0, WnR = 0 [ 0.833866] [0000000000000080] user address but active_mm is swapper [ 0.839951] Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP [ 0.845953] Modules linked in: [ 0.848869] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.1.1+g56321e101aca #1 [ 0.855617] Hardware name: Freescale i.MX8MP EVK (DT) [ 0.860452] pstate: 000000c5 (nzcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 0.867117] pc : __imx_uart_rxint.constprop.0+0x11c/0x2c0 [ 0.872283] lr : imx_uart_int+0xf8/0x1ec The issue only happends in the inmate linux when Jailhouse hypervisor enabled. The test procedure is: while true; do jailhouse enable imx8mp.cell jailhouse cell linux xxxx sleep 10 jailhouse cell destroy 1 jailhouse disable sleep 5 done And during the upper test, press keys to the 2nd linux console. When `jailhouse cell destroy 1`, the 2nd linux has no chance to put the uart to a quiese state, so USR1/2 may has pending interrupts. Then when `jailhosue cell linux xx` to start 2nd linux again, the issue trigger. In order to disable irqs before requesting them, both UCR1 and UCR2 irqs should be disabled, so here fix that, disable the Ageing Timer interrupt in UCR2 as UCR1 does.

Affected

12 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.20-1 (bookworm)linux 6.1.20-1 (bookworm)
linuxlinux
linuxlinux>= 8a61f0c70ae65c6b70d13228c3120c73d7425a60 < 3d41d9b256ae626c0dc434427c8e32450358d3b43d41d9b256ae626c0dc434427c8e32450358d3b4
linuxlinux>= 8a61f0c70ae65c6b70d13228c3120c73d7425a60 < 9795ece3a85ba9238191e97665586e2d79703ff39795ece3a85ba9238191e97665586e2d79703ff3
linuxlinux>= 8a61f0c70ae65c6b70d13228c3120c73d7425a60 < 963875b0655197281775b0ea614aab8b6b3eb001963875b0655197281775b0ea614aab8b6b3eb001
linuxlinux>= 8a61f0c70ae65c6b70d13228c3120c73d7425a60 < ef25e16ea9674b713a68c3bda821556ce9901254ef25e16ea9674b713a68c3bda821556ce9901254
linuxlinux_kernel>= 0 < 6.1.20-16.1.20-1
linuxlinux_kernel>= 0 < 6.1.20-16.1.20-1
linuxlinux_kernel>= 0 < 6.1.20-16.1.20-1
linuxlinux_kernel>= 4.3.0 < 5.15.995.15.99
linuxlinux_kernel>= 5.16.0 < 6.1.166.1.16
linuxlinux_kernel>= 6.2.0 < 6.2.36.2.3
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