{"cve":"CVE-2021-47560","nvd":{"published":"2024-05-24T15:15:20.613","modified":"2026-06-17T04:17:46.167","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmlxsw: spectrum: Protect driver from buggy firmware\n\nWhen processing port up/down events generated by the device's firmware,\nthe driver protects itself from events reported for non-existent local\nports, but not the CPU port (local port 0), which exists, but lacks a\nnetdev.\n\nThis can result in a NULL pointer dereference when calling\nnetif_carrier_{on,off}().\n\nFix this by bailing early when processing an event reported for the CPU\nport. Problem was only observed when running on top of a buggy emulator.","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/63b08b1f6834bbb0b4f7783bf63b80c8c8e9a047","https://git.kernel.org/stable/c/90d0736876c50ecde1a3275636a06b9ddb1cace9","https://git.kernel.org/stable/c/da4d70199e5d82da664a80077508d6c18f5e76df","https://git.kernel.org/stable/c/63b08b1f6834bbb0b4f7783bf63b80c8c8e9a047","https://git.kernel.org/stable/c/90d0736876c50ecde1a3275636a06b9ddb1cace9"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2021-47560","score":0.00222,"percentile":0.12811,"date":"2026-10-31"},"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."]}