{"cve":"CVE-2022-50421","nvd":{"published":"2025-10-01T12:15:33.380","modified":"2026-06-17T05:23:31.057","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nrpmsg: char: Avoid double destroy of default endpoint\n\nThe rpmsg_dev_remove() in rpmsg_core is the place for releasing\nthis default endpoint.\n\nSo need to avoid destroying the default endpoint in\nrpmsg_chrdev_eptdev_destroy(), this should be the same as\nrpmsg_eptdev_release(). Otherwise there will be double destroy\nissue that ept->refcount report warning:\n\nrefcount_t: underflow; use-after-free.\n\nCall trace:\n refcount_warn_saturate+0xf8/0x150\n virtio_rpmsg_destroy_ept+0xd4/0xec\n rpmsg_dev_remove+0x60/0x70\n\nThe issue can be reproduced by stopping remoteproc before\nclosing the /dev/rpmsgX.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-416"],"references":["https://git.kernel.org/stable/c/3f20ef7a845c2c8d7ec82ecffa20d95cab5ecfeb","https://git.kernel.org/stable/c/467233a4ac29b215d492843d067a9f091e6bf0c5","https://git.kernel.org/stable/c/ef828a39d6a7028836eaf37df3ad568c8c2dd6f9"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:11:26.888974865+00:00"},"epss":{"cve":"CVE-2022-50421","score":0.00161,"percentile":0.05287,"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."]}