high CVSS 7.1 EPSS <0.1%

CVE-2022-49278·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: remoteproc: Fix count check in rproc_coredump_write() Check count for 0, to avoid a potential underflow. Make the check the same as the one in rproc_recovery_write().

Severity
high
Software
Kernel
Fixed in
5.17.2
Published

How likely is exploitation

FIRST's Exploit Prediction Scoring System puts the probability of this CVE being exploited in the next 30 days at <0.1% — higher than 10% of all published CVEs. EPSS is an independent forecast of exploitation, not a severity rating: it says nothing about how much damage a successful attack does, which is what a CVSS score measures.

Read the two together. CVE-2022-49278 scores 7.1 on CVSS, so a successful attack would be serious — but at <0.1%, almost nobody is currently attempting it. That is a different situation from a flaw under mass exploitation, and it is usually the difference between patching on your next maintenance window and patching tonight.

Affected versions

From: 5.17

Until: 5.17.2

Fixed in: 5.17.2

How to fix this CVE

Update your Linux kernel to version 5.17.2 or later to patch a buffer underflow vulnerability in the remoteproc subsystem's coredump handler. This flaw could allow a local privileged user to cause a denial of service or potentially corrupt kernel memory. Apply the kernel update through your distribution's package manager and reboot to activate the patched version.

sudo dnf update kernel

Defensia detects this vulnerability

How to check if you are affected

  1. Step 1: Check your current kernel version with `uname -r` and verify it is 5.17.2 or later
  2. Step 2: Confirm remoteproc module is loaded by running `lsmod | grep remoteproc` — if output is empty, this component is not exposed
  3. Step 3: Search kernel logs for remoteproc errors with `sudo dmesg | grep remoteproc` or `sudo journalctl -u kernel | grep remoteproc` to identify any coredump write failures
  4. Step 4: After patching, verify the fix with `uname -r` again and restart monitoring for any remoteproc-related kernel panics or memory corruption warnings

FAQ

What is CVE-2022-49278?

CVE-2022-49278 is a buffer underflow vulnerability in the Linux kernel's remoteproc subsystem, specifically in the rproc_coredump_write() function which fails to validate input count values before processing them. This can lead to memory corruption or denial of service when a local privileged user interacts with the affected interface.

Is CVE-2022-49278 being actively exploited?

No, there is no evidence of active exploitation in the wild and no public exploits are available. However, the vulnerability remains relevant for systems running affected kernel versions.

What versions of Kernel are affected by CVE-2022-49278?

Linux kernel versions 5.17 through 5.17.1 are vulnerable. The fix was released in kernel 5.17.2 and backported to stable branches.

How do I check if my server is vulnerable to CVE-2022-49278?

Run `uname -r` to display your kernel version. If the output shows 5.17.0 or 5.17.1, your system is vulnerable. Also verify remoteproc is compiled in with `grep CONFIG_REMOTEPROC /boot/config-$(uname -r)` — if it shows 'y' or 'm', the vulnerable code is present.

Does Defensia detect CVE-2022-49278?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If the Linux kernel is installed on a monitored server, CVE-2022-49278 will appear in your dashboard with remediation steps.

Related Kernel CVEs

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CVE-2026-53384CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails dw8250_probe() registers the 8250 port via serial8250_register_8250_port() and then, if the device has a clock, registers a clock notifier. If clk_notifier_register() fails, probe returns the error but leaves the 8250 port registered. The matching serial8250_unregister_port() lives in dw8250_remove(), which is not called when probe fails, so the port slot stays occupied until the device is rebound or the system is rebooted. The devm-allocated driver data is freed while the port still references it (via the saved private_data and serial_in/serial_out callbacks), so any access to that port slot before a rebind is a use-after-free hazard. Unregister the port on the clk_notifier_register() error path.
CVE-2026-52931CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: batman-adv: tp_meter: avoid use of uninit sender vars batadv_tp_recv_ack() and batadv_tp_stop() are only valid for tp_vars in the BATADV_TP_SENDER role. When called with a BATADV_TP_RECEIVER role, it proceeds to read sender-only members that were never initialized, leading to undefined behavior. This can be triggered when a node that is currently acting as a receiver in an ongoing tp_meter session receives a malicious ACK packet. Guard against this by checking tp_vars->role immediately after the lookup and bailing out if it is not BATADV_TP_SENDER, before any of those members are accessed.
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References

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