{"cve":"CVE-2022-49931","nvd":{"published":"2025-05-01T15:16:19.087","modified":"2026-08-04T10:17:59.820","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nIB/hfi1: Correctly move list in sc_disable()\n\nCommit 13bac861952a (\"IB/hfi1: Fix abba locking issue with sc_disable()\")\nincorrectly tries to move a list from one list head to another.  The\nresult is a kernel crash.\n\nThe crash is triggered when a link goes down and there are waiters for a\nsend to complete.  The following signature is seen:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000030\n  [...]\n  Call Trace:\n   sc_disable+0x1ba/0x240 [hfi1]\n   pio_freeze+0x3d/0x60 [hfi1]\n   handle_freeze+0x27/0x1b0 [hfi1]\n   process_one_work+0x1b0/0x380\n   ? process_one_work+0x380/0x380\n   worker_thread+0x30/0x360\n   ? process_one_work+0x380/0x380\n   kthread+0xd7/0x100\n   ? kthread_complete_and_exit+0x20/0x20\n   ret_from_fork+0x1f/0x30\n\nThe fix is to use the correct call to move the list.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-476"],"references":["https://git.kernel.org/stable/c/1afac08b39d85437187bb2a92d89a741b1078f55","https://git.kernel.org/stable/c/25760a41e3802f54aadcc31385543665ab349b8e","https://git.kernel.org/stable/c/7c4260f8f188df32414a5ecad63e8b934c2aa3f0","https://git.kernel.org/stable/c/b8bcff99b07cc175a6ee12a52db51cdd2229586c","https://git.kernel.org/stable/c/ba95409d6b580501ff6d78efd00064f7df669926"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:01:22.920403922+00:00"},"epss":{"cve":"CVE-2022-49931","score":0.00243,"percentile":0.1558,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}