CVE-2024-46711 mptcp: pm: fix ID 0 endp usage after multiple re-creations

2024-09-1306:33:42

Linux

www.cve.org

linux kernel

vulnerability

mptcp

fix

id 0 endp

multiple re-creations

EPSS

Percentile

16.3%

JSON

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

mptcp: pm: fix ID 0 endp usage after multiple re-creations

‘local_addr_used’ and ‘add_addr_accepted’ are decremented for addresses
not related to the initial subflow (ID0), because the source and
destination addresses of the initial subflows are known from the
beginning: they don’t count as “additional local address being used” or
“ADD_ADDR being accepted”.

It is then required not to increment them when the entrypoint used by
the initial subflow is removed and re-added during a connection. Without
this modification, this entrypoint cannot be removed and re-added more
than once.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/mptcp/pm_netlink.c"
    ],
    "versions": [
      {
        "version": "3ad14f54bd74",
        "lessThan": "c9c744666f73",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "3ad14f54bd74",
        "lessThan": "53e2173172d2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "3ad14f54bd74",
        "lessThan": "119806ae4e46",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "3ad14f54bd74",
        "lessThan": "9366922adc6a",
        "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/mptcp/pm_netlink.c"
    ],
    "versions": [
      {
        "version": "6.0",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.0",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.109",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.49",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10.8",
        "lessThanOrEqual": "6.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.11",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]