CVE-2022-48748 net: bridge: vlan: fix memory leak in __allowed_ingress

2024-06-2011:13:30

Linux

www.cve.org

linux kernel

vulnerability

memory leak

network bridge

per-vlan state

vlan snooping

untagged frame

priority-tagged frame

skb memory

0.0004 Low

EPSS

Percentile

15.7%

JSON

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

net: bridge: vlan: fix memory leak in __allowed_ingress

When using per-vlan state, if vlan snooping and stats are disabled,
untagged or priority-tagged ingress frame will go to check pvid state.
If the port state is forwarding and the pvid state is not
learning/forwarding, untagged or priority-tagged frame will be dropped
but skb memory is not freed.
Should free skb when __allowed_ingress returns false.

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_vlan.c"
    ],
    "versions": [
      {
        "version": "a580c76d534c",
        "lessThan": "446ff1fc37c7",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a580c76d534c",
        "lessThan": "c5e216e880fa",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a580c76d534c",
        "lessThan": "14be8d448fca",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a580c76d534c",
        "lessThan": "fd20d9738395",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/bridge/br_vlan.c"
    ],
    "versions": [
      {
        "version": "5.6",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.6",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.96",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.19",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.16.5",
        "lessThanOrEqual": "5.16.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.17",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]