CVE-2024-40920 net: bridge: mst: fix suspicious rcu usage in br_mst_set_state

2024-07-1212:25:02

Linux

www.cve.org

linux

kernel

vulnerability

bridge

mst

fix

suspicious rcu usage

vlan

warning

EPSS

Percentile

15.9%

JSON

In the Linux kernel, the following vulnerability has been resolved:

net: bridge: mst: fix suspicious rcu usage in br_mst_set_state

I converted br_mst_set_state to RCU to avoid a vlan use-after-free
but forgot to change the vlan group dereference helper. Switch to vlan
group RCU deref helper to fix the suspicious rcu usage warning.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/bridge/br_mst.c"
    ],
    "versions": [
      {
        "version": "8ca9a750fc71",
        "lessThan": "caaa2129784a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4488617e5e99",
        "lessThan": "7caefa277172",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e43dd2b1ec74",
        "lessThan": "406bfc04b01e",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "3a7c1661ae13",
        "lessThan": "546ceb1dfdac",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/bridge/br_mst.c"
    ],
    "versions": [
      {
        "version": "6.1.93",
        "lessThan": "6.1.95",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "6.6.33",
        "lessThan": "6.6.35",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "6.9.3",
        "lessThan": "6.9.6",
        "status": "affected",
        "versionType": "custom"
      }
    ]
  }
]