CVE-2024-36883

2024-05-3016:15:11

416baaa9-dc9f-4396-8d5f-8c081fb06d67

web.nvd.nist.gov

cve-2024-36883

nvd

security vulnerability

6.5 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

13.2%

JSON

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

net: fix out-of-bounds access in ops_init

net_alloc_generic is called by net_alloc, which is called without any
locking. It reads max_gen_ptrs, which is changed under pernet_ops_rwsem. It
is read twice, first to allocate an array, then to set s.len, which is
later used to limit the bounds of the array access.

It is possible that the array is allocated and another thread is
registering a new pernet ops, increments max_gen_ptrs, which is then used
to set s.len with a larger than allocated length for the variable array.

Fix it by reading max_gen_ptrs only once in net_alloc_generic. If
max_gen_ptrs is later incremented, it will be caught in net_assign_generic.

Affected configurations

Vulners

Node

linuxlinux_kernelRange3.3–4.19.314

linuxlinux_kernelRange4.20.0–5.4.276

linuxlinux_kernelRange5.5.0–5.10.217

linuxlinux_kernelRange5.11.0–5.15.159

linuxlinux_kernelRange5.16.0–6.1.91

linuxlinux_kernelRange6.2.0–6.6.31

linuxlinux_kernelRange6.7.0–6.8.10

linuxlinux_kernelRange6.9.0≥

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/core/net_namespace.c"
    ],
    "versions": [
      {
        "version": "073862ba5d24",
        "lessThan": "3cdc34d76c4f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "073862ba5d24",
        "lessThan": "7b0e64583eab",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "073862ba5d24",
        "lessThan": "0c3248bc708a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "073862ba5d24",
        "lessThan": "9518b79bfd2f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "073862ba5d24",
        "lessThan": "2d60ff5874ae",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "073862ba5d24",
        "lessThan": "b6dbfd5bcc26",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "073862ba5d24",
        "lessThan": "f4f94587e1bf",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "073862ba5d24",
        "lessThan": "a26ff37e624d",
        "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/core/net_namespace.c"
    ],
    "versions": [
      {
        "version": "3.3",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.3",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.314",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.276",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.217",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.159",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.91",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.31",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8.10",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]