{"cve":"CVE-2022-49406","nvd":{"published":"2025-02-26T07:01:17.123","modified":"2026-06-17T05:17:57.483","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nblock: Fix potential deadlock in blk_ia_range_sysfs_show()\n\nWhen being read, a sysfs attribute is already protected against removal\nwith the kobject node active reference counter. As a result, in\nblk_ia_range_sysfs_show(), there is no need to take the queue sysfs\nlock when reading the value of a range attribute. Using the queue sysfs\nlock in this function creates a potential deadlock situation with the\ndisk removal, something that a lockdep signals with a splat when the\ndevice is removed:\n\n[  760.703551]  Possible unsafe locking scenario:\n[  760.703551]\n[  760.703554]        CPU0                    CPU1\n[  760.703556]        ----                    ----\n[  760.703558]   lock(&q->sysfs_lock);\n[  760.703565]                                lock(kn->active#385);\n[  760.703573]                                lock(&q->sysfs_lock);\n[  760.703579]   lock(kn->active#385);\n[  760.703587]\n[  760.703587]  *** DEADLOCK ***\n\nSolve this by removing the mutex_lock()/mutex_unlock() calls from\nblk_ia_range_sysfs_show().","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-667"],"references":["https://git.kernel.org/stable/c/41e46b3c2aa24f755b2ae9ec4ce931ba5f0d8532","https://git.kernel.org/stable/c/717b078bc745ba9a262abebed9806a17e8bbb77b","https://git.kernel.org/stable/c/dc107c805cde709866b59867ef72b9390199205e"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:59:48.811064707+00:00"},"epss":{"cve":"CVE-2022-49406","score":0.00196,"percentile":0.09339,"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."]}