CVE-2024-39503

2024-07-1213:15:12

Linux

web.nvd.nist.gov

linux kernel

netfilter

ipset

race condition

namespace cleanup

garbage collection

use after free

patch

rcu list

AI Score

6.5

Confidence

High

EPSS

Percentile

10.6%

JSON

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

netfilter: ipset: Fix race between namespace cleanup and gc in the list:set type

Lion Ackermann reported that there is a race condition between namespace cleanup
in ipset and the garbage collection of the list:set type. The namespace
cleanup can destroy the list:set type of sets while the gc of the set type is
waiting to run in rcu cleanup. The latter uses data from the destroyed set which
thus leads use after free. The patch contains the following parts:

When destroying all sets, first remove the garbage collectors, then wait
if needed and then destroy the sets.
Fix the badly ordered “wait then remove gc” for the destroy a single set
case.
Fix the missing rcu locking in the list:set type in the userspace test
case.
Use proper RCU list handlings in the list:set type.

The patch depends on c1193d9bbbd3 (netfilter: ipset: Add list flush to cancel_gc).

Affected configurations

Vulners

Node

linuxlinux_kernelRange6.8–5.4.279

linuxlinux_kernelRange5.5.0–5.10.221

linuxlinux_kernelRange5.11.0–5.15.162

linuxlinux_kernelRange5.16.0–6.1.95

linuxlinux_kernelRange6.2.0–6.6.35

linuxlinux_kernelRange6.7.0–6.9.6

linuxlinux_kernelRange6.10.0≥

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/netfilter/ipset/ip_set_core.c",
      "net/netfilter/ipset/ip_set_list_set.c"
    ],
    "versions": [
      {
        "version": "c7f2733e5011",
        "lessThan": "c0761d1f1ce1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a24d5f2ac8ef",
        "lessThan": "93b53c202b51",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c2dc077d8f72",
        "lessThan": "0f1bb77c6d83",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "653bc5e6d999",
        "lessThan": "390b353d1a1d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b93a6756a01f",
        "lessThan": "2ba35b37f780",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "97f7cf1cd80e",
        "lessThan": "90ae20d47de6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "97f7cf1cd80e",
        "lessThan": "4e7aaa6b82d6",
        "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/netfilter/ipset/ip_set_core.c",
      "net/netfilter/ipset/ip_set_list_set.c"
    ],
    "versions": [
      {
        "version": "6.8",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.8",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.279",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.221",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.162",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.95",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.35",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9.6",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]