CVE-2023-53855 (GCVE-0-2023-53855)

Vulnerability from cvelistv5 – Published: 2025-12-09 01:30 – Updated: 2025-12-09 01:30
VLAI?
Title
net: dsa: ocelot: call dsa_tag_8021q_unregister() under rtnl_lock() on driver remove
Summary
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' > /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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7c83a7c539abe9f980996063ac20532a7a7f6eb1 , < 758dbcfb257e1aee0a310bae789c2af6ffe35d0f (git)
Affected: 7c83a7c539abe9f980996063ac20532a7a7f6eb1 , < 7ae8fa6b70975b6efbbef7912d09bff5a0bff491 (git)
Affected: 7c83a7c539abe9f980996063ac20532a7a7f6eb1 , < a94c16a2fda010866b8858a386a8bfbeba4f72c5 (git)
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    Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 6.1.46 , ≤ 6.1.* (semver)
Unaffected: 6.4.11 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/dsa/ocelot/felix.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "758dbcfb257e1aee0a310bae789c2af6ffe35d0f",
              "status": "affected",
              "version": "7c83a7c539abe9f980996063ac20532a7a7f6eb1",
              "versionType": "git"
            },
            {
              "lessThan": "7ae8fa6b70975b6efbbef7912d09bff5a0bff491",
              "status": "affected",
              "version": "7c83a7c539abe9f980996063ac20532a7a7f6eb1",
              "versionType": "git"
            },
            {
              "lessThan": "a94c16a2fda010866b8858a386a8bfbeba4f72c5",
              "status": "affected",
              "version": "7c83a7c539abe9f980996063ac20532a7a7f6eb1",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/dsa/ocelot/felix.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "lessThan": "5.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.4.*",
              "status": "unaffected",
              "version": "6.4.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.46",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4.11",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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 \u00270000:00:00.2\u0027 \u003e /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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-09T01:30:20.864Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/758dbcfb257e1aee0a310bae789c2af6ffe35d0f"
        },
        {
          "url": "https://git.kernel.org/stable/c/7ae8fa6b70975b6efbbef7912d09bff5a0bff491"
        },
        {
          "url": "https://git.kernel.org/stable/c/a94c16a2fda010866b8858a386a8bfbeba4f72c5"
        }
      ],
      "title": "net: dsa: ocelot: call dsa_tag_8021q_unregister() under rtnl_lock() on driver remove",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53855",
    "datePublished": "2025-12-09T01:30:20.864Z",
    "dateReserved": "2025-12-09T01:27:17.828Z",
    "dateUpdated": "2025-12-09T01:30:20.864Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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