CVE-2023-52567

serial: 8250_port: Check IRQ data before use

3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 0.2%

exploitation probability

0.2%top 88% of all CVEs

observed exploitation

nono source reports it

In the Linux kernel, the following vulnerability has been resolved: serial: 8250_port: Check IRQ data before use In case the leaf driver wants to use IRQ polling (irq = 0) and IIR register shows that an interrupt happened in the 8250 hardware the IRQ data can be NULL. In such a case we need to skip the wake event as we came to this path from the timer interrupt and quite likely system is already awake. Without this fix we have got an Oops: serial8250: ttyS0 at I/O 0x3f8 (irq = 0, base_baud = 115200) is a 16550A ... BUG: kernel NULL pointer dereference, address: 0000000000000010 RIP: 0010:serial8250_handle_irq+0x7c/0x240 Call Trace: ? serial8250_handle_irq+0x7c/0x240 ? __pfx_serial8250_timeout+0x10/0x10

Affected products

Linux · Linux

References

https://git.kernel.org/stable/c/2b837f13a818f96304736453ac53b66a70aaa4f2 https://git.kernel.org/stable/c/3345cc5f02f1fb4c4dcb114706f2210d879ab933 https://git.kernel.org/stable/c/bf3c728e3692cc6d998874f0f27d433117348742 https://git.kernel.org/stable/c/c334650150c29234b0923476f51573ae1b2f252a https://git.kernel.org/stable/c/cce7fc8b29961b64fadb1ce398dc5ff32a79643b https://git.kernel.org/stable/c/e14afa4450cb7e4cf93e993a765801203d41d014 https://git.kernel.org/stable/c/e14f68a48fd445a083ac0750fafcb064df5f18f7 https://git.kernel.org/stable/c/ee5732caaffba3a37e753fdb89b4958db9a61847