CVE-2024-27396 net: gtp: Fix Use-After-Free in gtp_dellink

2024-05-0916:37:18

Linux

github.com

cve-2024-27396

net

gtp

fix use-after-free

linux kernel

AI Score

6.7

Confidence

Low

EPSS

Percentile

13.0%

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

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

net: gtp: Fix Use-After-Free in gtp_dellink

Since call_rcu, which is called in the hlist_for_each_entry_rcu traversal
of gtp_dellink, is not part of the RCU read critical section, it
is possible that the RCU grace period will pass during the traversal and
the key will be free.

To prevent this, it should be changed to hlist_for_each_entry_safe.

CNA Affected

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "043a283d24f4",
        "lessThan": "07b20d0a3dc1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c185e1d6e275",
        "lessThan": "718df1bc226c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "94dc550a5062",
        "lessThan": "0caff3e6390f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "94dc550a5062",
        "lessThan": "2e74b3fd6bf5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "94dc550a5062",
        "lessThan": "25a1c2d4b1fc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "94dc550a5062",
        "lessThan": "2aacd4de4547",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "94dc550a5062",
        "lessThan": "cd957d1716ec",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "94dc550a5062",
        "lessThan": "f2a904107ee2",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/gtp.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.5"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.5",
        "versionType": "custom"
      },
      {
        "status": "unaffected",
        "version": "4.19.313",
        "versionType": "custom",
        "lessThanOrEqual": "4.19.*"
      },
      {
        "status": "unaffected",
        "version": "5.4.275",
        "versionType": "custom",
        "lessThanOrEqual": "5.4.*"
      },
      {
        "status": "unaffected",
        "version": "5.10.216",
        "versionType": "custom",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.158",
        "versionType": "custom",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.90",
        "versionType": "custom",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.30",
        "versionType": "custom",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.8.9",
        "versionType": "custom",
        "lessThanOrEqual": "6.8.*"
      },
      {
        "status": "unaffected",
        "version": "6.9",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/gtp.c"
    ],
    "defaultStatus": "affected"
  }
]