{"cve":"CVE-2021-47558","nvd":{"published":"2024-05-24T15:15:20.467","modified":"2026-06-17T04:17:45.943","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: Disable Tx queues when reconfiguring the interface\n\nThe Tx queues were not disabled in situations where the driver needed to\nstop the interface to apply a new configuration. This could result in a\nkernel panic when doing any of the 3 following actions:\n* reconfiguring the number of queues (ethtool -L)\n* reconfiguring the size of the ring buffers (ethtool -G)\n* installing/removing an XDP program (ip l set dev ethX xdp)\n\nPrevent the panic by making sure netif_tx_disable is called when stopping\nan interface.\n\nWithout this patch, the following kernel panic can be observed when doing\nany of the actions above:\n\nUnable to handle kernel paging request at virtual address ffff80001238d040\n[....]\n Call trace:\n  dwmac4_set_addr+0x8/0x10\n  dev_hard_start_xmit+0xe4/0x1ac\n  sch_direct_xmit+0xe8/0x39c\n  __dev_queue_xmit+0x3ec/0xaf0\n  dev_queue_xmit+0x14/0x20\n[...]\n[ end trace 0000000000000002 ]---","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":[],"references":["https://git.kernel.org/stable/c/a92f0eebb8dc008b9e8c51c6f7b8c93b27a29a43","https://git.kernel.org/stable/c/b270bfe697367776eca2e6759a71d700fb8d82a2","https://git.kernel.org/stable/c/a92f0eebb8dc008b9e8c51c6f7b8c93b27a29a43","https://git.kernel.org/stable/c/b270bfe697367776eca2e6759a71d700fb8d82a2"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2021-47558","score":0.00183,"percentile":0.07873,"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."]}