Vulnerability-Lookup

FKIE_CVE-2022-48974

Vulnerability from fkie_nvd - Published: 2024-10-21 20:15 - Updated: 2026-06-17 05:16

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: fix using __this_cpu_add in preemptible Currently in nf_conntrack_hash_check_insert(), when it fails in nf_ct_ext_valid_pre/post(), NF_CT_STAT_INC() will be called in the preemptible context, a call trace can be triggered: BUG: using __this_cpu_add() in preemptible [00000000] code: conntrack/1636 caller is nf_conntrack_hash_check_insert+0x45/0x430 [nf_conntrack] Call Trace: <TASK> dump_stack_lvl+0x33/0x46 check_preemption_disabled+0xc3/0xf0 nf_conntrack_hash_check_insert+0x45/0x430 [nf_conntrack] ctnetlink_create_conntrack+0x3cd/0x4e0 [nf_conntrack_netlink] ctnetlink_new_conntrack+0x1c0/0x450 [nf_conntrack_netlink] nfnetlink_rcv_msg+0x277/0x2f0 [nfnetlink] netlink_rcv_skb+0x50/0x100 nfnetlink_rcv+0x65/0x144 [nfnetlink] netlink_unicast+0x1ae/0x290 netlink_sendmsg+0x257/0x4f0 sock_sendmsg+0x5f/0x70 This patch is to fix it by changing to use NF_CT_STAT_INC_ATOMIC() for nf_ct_ext_valid_pre/post() check in nf_conntrack_hash_check_insert(), as well as nf_ct_ext_valid_post() in __nf_conntrack_confirm(). Note that nf_ct_ext_valid_pre() check in __nf_conntrack_confirm() is safe to use NF_CT_STAT_INC(), as it's under local_bh_disable().

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9464d0b68f11a9bc768370c3260ec02b3550447b	Patch
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d9bf1138a5db419db13bd9fcd3a7178d6bb20f7c	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	6.1
linux	linux_kernel	6.1
linux	linux_kernel	6.1
linux	linux_kernel	6.1
linux	linux_kernel	6.1
linux	linux_kernel	6.1
linux	linux_kernel	6.1
linux	linux_kernel	6.1

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_conntrack_core.c"
          ],
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              "version": "c56716c69ce1ac320432fb1ea5654196ba24d2f8",
              "versionType": "git"
            }
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        },
        {
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          "vendor": "Linux",
          "versions": [
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              "version": "5.19"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.0.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: fix using __this_cpu_add in preemptible\n\nCurrently in nf_conntrack_hash_check_insert(), when it fails in\nnf_ct_ext_valid_pre/post(), NF_CT_STAT_INC() will be called in the\npreemptible context, a call trace can be triggered:\n\n   BUG: using __this_cpu_add() in preemptible [00000000] code: conntrack/1636\n   caller is nf_conntrack_hash_check_insert+0x45/0x430 [nf_conntrack]\n   Call Trace:\n    \u003cTASK\u003e\n    dump_stack_lvl+0x33/0x46\n    check_preemption_disabled+0xc3/0xf0\n    nf_conntrack_hash_check_insert+0x45/0x430 [nf_conntrack]\n    ctnetlink_create_conntrack+0x3cd/0x4e0 [nf_conntrack_netlink]\n    ctnetlink_new_conntrack+0x1c0/0x450 [nf_conntrack_netlink]\n    nfnetlink_rcv_msg+0x277/0x2f0 [nfnetlink]\n    netlink_rcv_skb+0x50/0x100\n    nfnetlink_rcv+0x65/0x144 [nfnetlink]\n    netlink_unicast+0x1ae/0x290\n    netlink_sendmsg+0x257/0x4f0\n    sock_sendmsg+0x5f/0x70\n\nThis patch is to fix it by changing to use NF_CT_STAT_INC_ATOMIC() for\nnf_ct_ext_valid_pre/post() check in nf_conntrack_hash_check_insert(),\nas well as nf_ct_ext_valid_post() in __nf_conntrack_confirm().\n\nNote that nf_ct_ext_valid_pre() check in __nf_conntrack_confirm() is\nsafe to use NF_CT_STAT_INC(), as it\u0027s under local_bh_disable()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: conntrack: correcci\u00f3n al usar __this_cpu_add en preemptible Actualmente en nf_conntrack_hash_check_insert(), cuando fallo en nf_ct_ext_valid_pre/post(), se llamar\u00e1 a NF_CT_STAT_INC() en el contexto preemptible, se puede activar un seguimiento de llamada: ERROR: uso de __this_cpu_add() en preemptible [00000000] c\u00f3digo: conntrack/1636 el llamador es nf_conntrack_hash_check_insert+0x45/0x430 [nf_conntrack] Seguimiento de llamada:  dump_stack_lvl+0x33/0x46 check_preemption_disabled+0xc3/0xf0 Este parche es para solucionarlo cambiando para usar NF_CT_STAT_INC_ATOMIC() para la comprobaci\u00f3n de nf_ct_ext_valid_pre/post() en nf_conntrack_hash_check_insert(), as\u00ed como nf_ct_ext_valid_post() en __nf_conntrack_confirm(). Tenga en cuenta que la comprobaci\u00f3n de nf_ct_ext_valid_pre() en __nf_conntrack_confirm() es segura para usar NF_CT_STAT_INC(), ya que se encuentra bajo local_bh_disable()."
    }
  ],
  "id": "CVE-2022-48974",
  "lastModified": "2026-06-17T05:16:45.240",
  "metrics": {
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        "cvssData": {
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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        "ssvcData": {
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          "options": [
            {
              "exploitation": "none"
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          "role": "CISA Coordinator",
          "timestamp": "2024-10-22T13:18:44.032188Z",
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  "vulnStatus": "Analyzed",
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      "type": "Primary"
    }
  ]
}

CVE-2022-48974 (GCVE-0-2022-48974)

Vulnerability from cvelistv5 – Published: 2024-10-21 20:05 – Updated: 2026-05-11 18:50

Title

netfilter: conntrack: fix using __this_cpu_add in preemptible

Summary

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-10-22 13:18 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6820 records in the last 180 days details

References

2 references

URL	Tags
https://git.kernel.org/stable/c/d9bf1138a5db419db…
https://git.kernel.org/stable/c/9464d0b68f11a9bc7…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: c56716c69ce1ac320432fb1ea5654196ba24d2f8 , < d9bf1138a5db419db13bd9fcd3a7178d6bb20f7c (git) Affected: c56716c69ce1ac320432fb1ea5654196ba24d2f8 , < 9464d0b68f11a9bc768370c3260ec02b3550447b (git)
Linux	Linux	Affected: 5.19 Unaffected: 0 , < 5.19 (semver) Unaffected: 6.0.13 , ≤ 6.0.* (semver) Unaffected: 6.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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        "metrics": [
          {
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                "id": "CVE-2022-48974",
                "options": [
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                  },
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                "role": "CISA Coordinator",
                "timestamp": "2024-10-22T13:18:44.032188Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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