{"cve":"CVE-2023-53855","nvd":{"published":"2025-12-09T16:17:26.173","modified":"2026-06-17T06:46:11.473","status":"Deferred","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: ocelot: call dsa_tag_8021q_unregister() under rtnl_lock() on driver remove\n\nWhen the tagging protocol in current use is \"ocelot-8021q\" and we unbind\nthe driver, we see this splat:\n\n$ echo '0000:00:00.2' > /sys/bus/pci/drivers/fsl_enetc/unbind\nmscc_felix 0000:00:00.5 swp0: left promiscuous mode\nsja1105 spi2.0: Link is Down\nDSA: tree 1 torn down\nmscc_felix 0000:00:00.5 swp2: left promiscuous mode\nsja1105 spi2.2: Link is Down\nDSA: tree 3 torn down\nfsl_enetc 0000:00:00.2 eno2: left promiscuous mode\nmscc_felix 0000:00:00.5: Link is Down\n------------[ cut here ]------------\nRTNL: assertion failed at net/dsa/tag_8021q.c (409)\nWARNING: CPU: 1 PID: 329 at net/dsa/tag_8021q.c:409 dsa_tag_8021q_unregister+0x12c/0x1a0\nModules linked in:\nCPU: 1 PID: 329 Comm: bash Not tainted 6.5.0-rc3+ #771\npc : dsa_tag_8021q_unregister+0x12c/0x1a0\nlr : dsa_tag_8021q_unregister+0x12c/0x1a0\nCall trace:\n dsa_tag_8021q_unregister+0x12c/0x1a0\n felix_tag_8021q_teardown+0x130/0x150\n felix_teardown+0x3c/0xd8\n dsa_tree_teardown_switches+0xbc/0xe0\n dsa_unregister_switch+0x168/0x260\n felix_pci_remove+0x30/0x60\n pci_device_remove+0x4c/0x100\n device_release_driver_internal+0x188/0x288\n device_links_unbind_consumers+0xfc/0x138\n device_release_driver_internal+0xe0/0x288\n device_driver_detach+0x24/0x38\n unbind_store+0xd8/0x108\n drv_attr_store+0x30/0x50\n---[ end trace 0000000000000000 ]---\n------------[ cut here ]------------\nRTNL: assertion failed at net/8021q/vlan_core.c (376)\nWARNING: CPU: 1 PID: 329 at net/8021q/vlan_core.c:376 vlan_vid_del+0x1b8/0x1f0\nCPU: 1 PID: 329 Comm: bash Tainted: G        W          6.5.0-rc3+ #771\npc : vlan_vid_del+0x1b8/0x1f0\nlr : vlan_vid_del+0x1b8/0x1f0\n dsa_tag_8021q_unregister+0x8c/0x1a0\n felix_tag_8021q_teardown+0x130/0x150\n felix_teardown+0x3c/0xd8\n dsa_tree_teardown_switches+0xbc/0xe0\n dsa_unregister_switch+0x168/0x260\n felix_pci_remove+0x30/0x60\n pci_device_remove+0x4c/0x100\n device_release_driver_internal+0x188/0x288\n device_links_unbind_consumers+0xfc/0x138\n device_release_driver_internal+0xe0/0x288\n device_driver_detach+0x24/0x38\n unbind_store+0xd8/0x108\n drv_attr_store+0x30/0x50\nDSA: tree 0 torn down\n\nThis was somewhat not so easy to spot, because \"ocelot-8021q\" is not the\ndefault tagging protocol, and thus, not everyone who tests the unbinding\npath may have switched to it beforehand. The default\nfelix_tag_npi_teardown() does not require rtnl_lock() to be held.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/758dbcfb257e1aee0a310bae789c2af6ffe35d0f","https://git.kernel.org/stable/c/7ae8fa6b70975b6efbbef7912d09bff5a0bff491","https://git.kernel.org/stable/c/a94c16a2fda010866b8858a386a8bfbeba4f72c5"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:16:40.427100871+00:00"},"epss":{"cve":"CVE-2023-53855","score":0.00219,"percentile":0.12433,"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."]}