What is CVE-2022-49931?

CVE-2022-49931 is a high-severity vulnerability in Linux, classified under NULL Pointer Dereference. CVSS score: 8.8/10. Published 2025-05-01.

How severe is CVE-2022-49931?

High severity. CVSS v3 base score is 8.8 out of 10.

NULL pointer dereference in Linux

CVE-2022-49931

In the Linux kernel, the following vulnerability has been resolved: IB/hfi1: Correctly move list in sc_disable() Commit 13bac861952a ("IB/hfi1: Fix abba locking issue with sc_disable()") incorrectly tries to move a list from one list head to another. The result is a kernel crash. The crash is triggered when a link goes down and there are waiters for a send to complete. The following signature is seen: BUG: kernel NULL pointer dereference, address: 0000000000000030 [...] Call Trace: sc_disable+0x1ba/0x240 [hfi1] pio_freeze+0x3d/0x60 [hfi1] handle_freeze+0x27/0x1b0 [hfi1] process_one_work+0x1b0/0x380 ? process_one_work+0x380/0x380 worker_thread+0x30/0x360 ? process_one_work+0x380/0x380 kthread+0xd7/0x100 ? kthread_complete_and_exit+0x20/0x20 ret_from_fork+0x1f/0x30 The fix is to use the correct call to move the list.

EPSS: 0.002 (6.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 6.0.8, 13bac861952a78664907a0f927d3e874e9a59034, d98883f6c33e0d960afedcecaa92fc2b61fec383
Linux Linux_kernel — versions 6.1

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2022-49931?: CVE-2022-49931 is a high-severity vulnerability in Linux, classified under NULL Pointer Dereference. CVSS score: 8.8/10. Published 2025-05-01.
How severe is CVE-2022-49931?: High severity. CVSS v3 base score is 8.8 out of 10.