{"id":"DEBIAN-CVE-2023-53855","details":"In the Linux kernel, the following vulnerability has been resolved:  net: dsa: ocelot: call dsa_tag_8021q_unregister() under rtnl_lock() on driver remove  When the tagging protocol in current use is \"ocelot-8021q\" and we unbind the driver, we see this splat:  $ echo '0000:00:00.2' \u003e /sys/bus/pci/drivers/fsl_enetc/unbind mscc_felix 0000:00:00.5 swp0: left promiscuous mode sja1105 spi2.0: Link is Down DSA: tree 1 torn down mscc_felix 0000:00:00.5 swp2: left promiscuous mode sja1105 spi2.2: Link is Down DSA: tree 3 torn down fsl_enetc 0000:00:00.2 eno2: left promiscuous mode mscc_felix 0000:00:00.5: Link is Down ------------[ cut here ]------------ RTNL: assertion failed at net/dsa/tag_8021q.c (409) WARNING: CPU: 1 PID: 329 at net/dsa/tag_8021q.c:409 dsa_tag_8021q_unregister+0x12c/0x1a0 Modules linked in: CPU: 1 PID: 329 Comm: bash Not tainted 6.5.0-rc3+ #771 pc : dsa_tag_8021q_unregister+0x12c/0x1a0 lr : dsa_tag_8021q_unregister+0x12c/0x1a0 Call trace:  dsa_tag_8021q_unregister+0x12c/0x1a0  felix_tag_8021q_teardown+0x130/0x150  felix_teardown+0x3c/0xd8  dsa_tree_teardown_switches+0xbc/0xe0  dsa_unregister_switch+0x168/0x260  felix_pci_remove+0x30/0x60  pci_device_remove+0x4c/0x100  device_release_driver_internal+0x188/0x288  device_links_unbind_consumers+0xfc/0x138  device_release_driver_internal+0xe0/0x288  device_driver_detach+0x24/0x38  unbind_store+0xd8/0x108  drv_attr_store+0x30/0x50 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ RTNL: assertion failed at net/8021q/vlan_core.c (376) WARNING: CPU: 1 PID: 329 at net/8021q/vlan_core.c:376 vlan_vid_del+0x1b8/0x1f0 CPU: 1 PID: 329 Comm: bash Tainted: G        W          6.5.0-rc3+ #771 pc : vlan_vid_del+0x1b8/0x1f0 lr : vlan_vid_del+0x1b8/0x1f0  dsa_tag_8021q_unregister+0x8c/0x1a0  felix_tag_8021q_teardown+0x130/0x150  felix_teardown+0x3c/0xd8  dsa_tree_teardown_switches+0xbc/0xe0  dsa_unregister_switch+0x168/0x260  felix_pci_remove+0x30/0x60  pci_device_remove+0x4c/0x100  device_release_driver_internal+0x188/0x288  device_links_unbind_consumers+0xfc/0x138  device_release_driver_internal+0xe0/0x288  device_driver_detach+0x24/0x38  unbind_store+0xd8/0x108  drv_attr_store+0x30/0x50 DSA: tree 0 torn down  This was somewhat not so easy to spot, because \"ocelot-8021q\" is not the default tagging protocol, and thus, not everyone who tests the unbinding path may have switched to it beforehand. The default felix_tag_npi_teardown() does not require rtnl_lock() to be held.","modified":"2026-09-15T08:47:42.196115806Z","published":"2025-12-09T16:17:26.173Z","upstream":["CVE-2023-53855"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-53855"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.52-1"}]}],"versions":["6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53855.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.4.11-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53855.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.4.11-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53855.json"}}],"schema_version":"1.9.0"}