high CVSS 7.8

CVE-2022-49724·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: tty: goldfish: Fix free_irq() on remove Pass the correct dev_id to free_irq() to fix this splat when the driver is unbound: WARNING: CPU: 0 PID: 30 at kernel/irq/manage.c:1895 free_irq Trying to free already-free IRQ 65 Call Trace: warn_slowpath_fmt free_irq goldfish_tty_remove platform_remove device_remove device_release_driver_internal device_driver_detach unbind_store drv_attr_store ...

Severity
high
Software
Kernel
Fixed in
5.18.6
Published
2025-02-26

Affected versions

From: 5.16

Until: 5.18.6

Fixed in: 5.18.6

How to fix this CVE

Update your Linux kernel to version 5.18.6 or later to resolve an IRQ management bug in the Goldfish TTY driver that causes kernel warnings during driver unbind operations. This fix ensures proper cleanup of interrupt handlers when the Goldfish TTY device is removed from the system, preventing resource leaks and stability issues.

sudo dnf update kernel kernel-devel

Defensia detects this vulnerability

How to check if you are affected

  1. Step 1: Check your kernel version with `uname -r` and compare against the affected range (5.16 to 5.18.5). Versions 5.18.6+ are patched.
  2. Step 2: Verify if Goldfish TTY driver is loaded on your system by running `grep -i goldfish /proc/modules` or `lsmod | grep goldfish`.
  3. Step 3: Search system logs for IRQ-related warnings using `grep -i 'free_irq\|Trying to free already-free IRQ' /var/log/kern.log /var/log/syslog`.
  4. Step 4: After patching, reboot the system and verify the new kernel version with `uname -r`, then repeat Step 3 to confirm warnings no longer appear.

FAQ

What is CVE-2022-49724?

CVE-2022-49724 is a kernel resource management flaw in the Goldfish TTY driver where the interrupt handler cleanup routine uses an incorrect device ID parameter, causing the kernel to attempt freeing an already-freed IRQ and generating kernel warnings on driver removal.

Is CVE-2022-49724 being actively exploited?

No, CVE-2022-49724 is not listed in CISA's Known Exploited Vulnerabilities catalog and no public exploits are available. This is a local resource management issue that triggers warnings rather than enabling direct attacks.

What versions of Kernel are affected by CVE-2022-49724?

Linux kernel versions 5.16 through 5.18.5 are vulnerable. Kernel 5.18.6 and later versions contain the fix.

How do I check if my server is vulnerable to CVE-2022-49724?

Run `uname -r` to display your kernel version. If the output shows a version between 5.16 and 5.18.5 (inclusive) and the Goldfish TTY driver is present (check via `lsmod | grep goldfish`), your system is vulnerable.

Does Defensia detect CVE-2022-49724?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If Kernel is installed on a monitored server, CVE-2022-49724 will appear in your dashboard with remediation steps.

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CVE-2026-100075CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters When srpt_alloc_rw_ctxs() fails partway through a multi-buffer indirect descriptor, the unwind path destroys RDMA contexts but leaves stale n_rw_ctx and n_rdma values (and a dangling rw_ctxs pointer). Later sq_wr_avail accounting in srpt_queue_response() or srpt_write_pending() can then subtract the wrong number of send queue credits. Reset the counters and clear rw_ctxs after freeing the heap allocation before returning an error.
CVE-2026-64033CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: RDMA/rtrs: Fix use-after-free in path file creation cleanup In the error path of rtrs_srv_create_path_files(), the sysfs root folders may already have been created and srv_path->kobj may already have been initialized. If a later step fails, the cleanup currently calls kobject_put(&srv_path->kobj) before rtrs_srv_destroy_once_sysfs_root_folders(srv_path). kobject_put() may drop the last reference to srv_path->kobj and invoke the release callback, rtrs_srv_release(), which frees srv_path. The following call to rtrs_srv_destroy_once_sysfs_root_folders(srv_path) then dereferences srv_path internally to access srv_path->srv, resulting in a use-after-free. This failure path is reached before rtrs_srv_create_path_files() returns success, so the successful-path lifetime handling is not involved. Fix this by destroying the sysfs root folders before calling kobject_put(&srv_path->kobj), so srv_path is still valid while the helper accesses it. This issue was found by a static analysis tool I am developing.
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References

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