CVE-2024-44985 ipv6: prevent possible UAF in ip6_xmit()

2024-09-0419:54:34

Linux

www.cve.org

linux kernel

vulnerability resolved

ipv6

skb_expand_head

null

rcu_read_lock

uaf

EPSS

Percentile

5.1%

JSON

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

ipv6: prevent possible UAF in ip6_xmit()

If skb_expand_head() returns NULL, skb has been freed
and the associated dst/idev could also have been freed.

We must use rcu_read_lock() to prevent a possible UAF.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv6/ip6_output.c"
    ],
    "versions": [
      {
        "version": "0c9f227bee11",
        "lessThan": "975f764e96f7",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0c9f227bee11",
        "lessThan": "38a21c026ed2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0c9f227bee11",
        "lessThan": "124b428fe280",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0c9f227bee11",
        "lessThan": "fc88d6c1f289",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0c9f227bee11",
        "lessThan": "2d5ff7e339d0",
        "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/ipv6/ip6_output.c"
    ],
    "versions": [
      {
        "version": "5.15",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.15",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.166",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.107",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.48",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10.7",
        "lessThanOrEqual": "6.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.11",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]