CVE-2026-23017 — MEDIUM (5.5)

Q: How severe is CVE-2026-23017?

CVE-2026-23017 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-23017?

Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: idpf: fix error handling in the init_task on load If the init_task fails during a driver load, we end up without vports and netdevs, effectively failing the entire process. In that state a subsequent reset will result in a crash as the service task attempts to access uninitialized resources. Following trace is from an error in the init_task where the CREATE_VPORT (op 501) is rejected by the FW: [40922.763136] idpf 0000:83:00.0: Device HW Reset initiated [40924.449797] idpf 0000:83:00.0: Transaction failed (op 501) [40958.148190] idpf 0000:83:00.0: HW reset detected [40958.161202] BUG: kernel NULL pointer dereference, address: 00000000000000a8 ... [40958.168094] Workqueue: idpf-0000:83:00.0-vc_event idpf_vc_event_task [idpf] [40958.168865] RIP: 0010:idpf_vc_event_task+0x9b/0x350 [idpf] ... [40958.177932] Call Trace: [40958.178491] <TASK> [40958.179040] process_one_work+0x226/0x6d0 [40958.179609] worker_thread+0x19e/0x340 [40958.180158] ? __pfx_worker_thread+0x10/0x10 [40958.180702] kthread+0x10f/0x250 [40958.181238] ? __pfx_kthread+0x10/0x10 [40958.181774] ret_from_fork+0x251/0x2b0 [40958.182307] ? __pfx_kthread+0x10/0x10 [40958.182834] ret_from_fork_asm+0x1a/0x30 [40958.183370] </TASK> Fix the error handling in the init_task to make sure the service and mailbox tasks are disabled if the error happens during load. These are started in idpf_vc_core_init(), which spawns the init_task and has no way of knowing if it failed. If the error happens on reset, following successful driver load, the tasks can still run, as that will allow the netdevs to attempt recovery through another reset. Stop the PTP callbacks either way as those will be restarted by the call to idpf_vc_core_init() during a successful reset.

CVSS Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Linux	Linux Kernel	>= 6.7.1, < 6.18.6

Related Weaknesses (CWE)

CWE-476

References

FAQ

What is CVE-2026-23017?

CVE-2026-23017 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: idpf: fix error handling in the init_task on load If the init_task fails during a driver load, we end up without vports and netdev...

How severe is CVE-2026-23017?

CVE-2026-23017 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-23017?

Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.