{
  "cveId": "CVE-2026-23203",
  "url": "https://patchblox.com/security/cve/CVE-2026-23203",
  "summary": "CVE-2026-23203 is fixed in linux on 1 platform by DEBIAN-CVE-2026-23203 (version 6.18.10-1), released February 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  net: cpsw_new: Execute ndo_set_rx_mode callback...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net: cpsw_new: Execute ndo_set_rx_mode callback in a work queue  Commit 1767bb2d47b7 (\u0022ipv6: mcast: Don\u0027t hold RTNL for IPV6_ADD_MEMBERSHIP and MCAST_JOIN_GROUP.\u0022) removed the RTNL lock for IPV6_ADD_MEMBERSHIP and MCAST_JOIN_GROUP operations. However, this change triggered the following call trace on my BeagleBone Black board:   WARNING: net/8021q/vlan_core.c:236 at vlan_for_each\u002B0x120/0x124, CPU#0: rpcbind/496   RTNL: assertion failed at net/8021q/vlan_core.c (236)   Modules linked in:   CPU: 0 UID: 997 PID: 496 Comm: rpcbind Not tainted 6.19.0-rc6-next-20260122-yocto-standard\u002B #8 PREEMPT   Hardware name: Generic AM33XX (Flattened Device Tree)   Call trace:    unwind_backtrace from show_stack\u002B0x28/0x2c    show_stack from dump_stack_lvl\u002B0x30/0x38    dump_stack_lvl from __warn\u002B0xb8/0x11c    __warn from warn_slowpath_fmt\u002B0x130/0x194    warn_slowpath_fmt from vlan_for_each\u002B0x120/0x124    vlan_for_each from cpsw_add_mc_addr\u002B0x54/0xd8    cpsw_add_mc_addr from __hw_addr_ref_sync_dev\u002B0xc4/0xec    __hw_addr_ref_sync_dev from __dev_mc_add\u002B0x78/0x88    __dev_mc_add from igmp6_group_added\u002B0x84/0xec    igmp6_group_added from __ipv6_dev_mc_inc\u002B0x1fc/0x2f0    __ipv6_dev_mc_inc from __ipv6_sock_mc_join\u002B0x124/0x1b4    __ipv6_sock_mc_join from do_ipv6_setsockopt\u002B0x84c/0x1168    do_ipv6_setsockopt from ipv6_setsockopt\u002B0x88/0xc8    ipv6_setsockopt from do_sock_setsockopt\u002B0xe8/0x19c    do_sock_setsockopt from __sys_setsockopt\u002B0x84/0xac    __sys_setsockopt from ret_fast_syscall\u002B0x0/0x5  This trace occurs because vlan_for_each() is called within cpsw_ndo_set_rx_mode(), which expects the RTNL lock to be held. Since modifying vlan_for_each() to operate without the RTNL lock is not straightforward, and because ndo_set_rx_mode() is invoked both with and without the RTNL lock across different code paths, simply adding rtnl_lock() in cpsw_ndo_set_rx_mode() is not a viable solution.  To resolve this issue, we opt to execute the actual processing within a work queue, following the approach used by the icssg-prueth driver.",
  "published": "2026-02-14T17:15:58Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00116,
  "epssPercentile": 0.01631,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.18.10-1",
      "fix": "DEBIAN-CVE-2026-23203",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-23203",
      "released": "2026-02-14T17:15:58Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}