CVE-2025-22069

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

riscv: fgraph: Fix stack layout to match __arch_ftrace_regs argument of ftrace_return_to_handler

Naresh Kamboju reported a "Bad frame pointer" kernel warning while

running LTP trace ftrace_stress_test.sh in riscv. We can reproduce the

same issue with the following command:

```

$ cd /sys/kernel/debug/tracing

$ echo 'f:myprobe do_nanosleep%return args1=$retval' > dynamic_events

$ echo 1 > events/fprobes/enable

$ echo 1 > tracing_on

$ sleep 1

```

And we can get the following kernel warning:

[ 127.692888] ------------[ cut here ]------------

[ 127.693755] Bad frame pointer: expected ff2000000065be50, received ba34c141e9594000

[ 127.693755] from func do_nanosleep return to ffffffff800ccb16

[ 127.698699] WARNING: CPU: 1 PID: 129 at kernel/trace/fgraph.c:755 ftrace_return_to_handler+0x1b2/0x1be

[ 127.699894] Modules linked in:

[ 127.700908] CPU: 1 UID: 0 PID: 129 Comm: sleep Not tainted 6.14.0-rc3-g0ab191c74642 #

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected Products

References