Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.4.157, < 5.4.224 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/1afac08b39d85437187bb2a92d89a741b1078f55Patch
- https://git.kernel.org/stable/c/25760a41e3802f54aadcc31385543665ab349b8ePatch
- https://git.kernel.org/stable/c/7c4260f8f188df32414a5ecad63e8b934c2aa3f0Patch
- https://git.kernel.org/stable/c/b8bcff99b07cc175a6ee12a52db51cdd2229586cPatch
- https://git.kernel.org/stable/c/ba95409d6b580501ff6d78efd00064f7df669926Patch
FAQ
What is CVE-2022-49931?
CVE-2022-49931 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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...
How severe is CVE-2022-49931?
CVE-2022-49931 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-2022-49931?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.