net: cpsw_new: Execute ndo_set_rx_mode callback in a work queue

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-23203",
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "dateUpdated": "2026-02-14T16:27:27.048Z",
    "dateReserved": "2026-01-13T15:37:45.986Z",
    "datePublished": "2026-02-14T16:27:27.048Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux",
        "dateUpdated": "2026-02-14T16:27:27.048Z"
      },
      "title": "net: cpsw_new: Execute ndo_set_rx_mode callback in a work queue",
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: cpsw_new: Execute ndo_set_rx_mode callback in a work queue\n\nCommit 1767bb2d47b7 (\"ipv6: mcast: Don't hold RTNL for\nIPV6_ADD_MEMBERSHIP and MCAST_JOIN_GROUP.\") removed the RTNL lock for\nIPV6_ADD_MEMBERSHIP and MCAST_JOIN_GROUP operations. However, this\nchange triggered the following call trace on my BeagleBone Black board:\n  WARNING: net/8021q/vlan_core.c:236 at vlan_for_each+0x120/0x124, CPU#0: rpcbind/496\n  RTNL: assertion failed at net/8021q/vlan_core.c (236)\n  Modules linked in:\n  CPU: 0 UID: 997 PID: 496 Comm: rpcbind Not tainted 6.19.0-rc6-next-20260122-yocto-standard+ #8 PREEMPT\n  Hardware name: Generic AM33XX (Flattened Device Tree)\n  Call trace:\n   unwind_backtrace from show_stack+0x28/0x2c\n   show_stack from dump_stack_lvl+0x30/0x38\n   dump_stack_lvl from __warn+0xb8/0x11c\n   __warn from warn_slowpath_fmt+0x130/0x194\n   warn_slowpath_fmt from vlan_for_each+0x120/0x124\n   vlan_for_each from cpsw_add_mc_addr+0x54/0xd8\n   cpsw_add_mc_addr from __hw_addr_ref_sync_dev+0xc4/0xec\n   __hw_addr_ref_sync_dev from __dev_mc_add+0x78/0x88\n   __dev_mc_add from igmp6_group_added+0x84/0xec\n   igmp6_group_added from __ipv6_dev_mc_inc+0x1fc/0x2f0\n   __ipv6_dev_mc_inc from __ipv6_sock_mc_join+0x124/0x1b4\n   __ipv6_sock_mc_join from do_ipv6_setsockopt+0x84c/0x1168\n   do_ipv6_setsockopt from ipv6_setsockopt+0x88/0xc8\n   ipv6_setsockopt from do_sock_setsockopt+0xe8/0x19c\n   do_sock_setsockopt from __sys_setsockopt+0x84/0xac\n   __sys_setsockopt from ret_fast_syscall+0x0/0x5\n\nThis trace occurs because vlan_for_each() is called within\ncpsw_ndo_set_rx_mode(), which expects the RTNL lock to be held.\nSince modifying vlan_for_each() to operate without the RTNL lock is not\nstraightforward, and because ndo_set_rx_mode() is invoked both with and\nwithout the RTNL lock across different code paths, simply adding\nrtnl_lock() in cpsw_ndo_set_rx_mode() is not a viable solution.\n\nTo resolve this issue, we opt to execute the actual processing within\na work queue, following the approach used by the icssg-prueth driver."
        }
      ],
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/ti/cpsw_new.c",
            "drivers/net/ethernet/ti/cpsw_priv.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "1767bb2d47b715a106287a8f963d9ec6cbab4e69",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d5b3a669866977dc87fd56fcf00a70df1536d258"
            },
            {
              "version": "1767bb2d47b715a106287a8f963d9ec6cbab4e69",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c0b5dc73a38f954e780f93a549b8fe225235c07a"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/ti/cpsw_new.c",
            "drivers/net/ethernet/ti/cpsw_priv.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.17",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.17"
            },
            {
              "version": "6.18.10",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d5b3a669866977dc87fd56fcf00a70df1536d258"
        },
        {
          "url": "https://git.kernel.org/stable/c/c0b5dc73a38f954e780f93a549b8fe225235c07a"
        }
      ]
    }
  }
}