Vulnerability-Lookup

FKIE_CVE-2022-48985

Vulnerability from fkie_nvd - Published: 2024-10-21 20:15 - Updated: 2026-08-04 10:17

Severity

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

Summary

In the Linux kernel, the following vulnerability has been resolved: net: mana: Fix race on per-CQ variable napi work_done After calling napi_complete_done(), the NAPIF_STATE_SCHED bit may be cleared, and another CPU can start napi thread and access per-CQ variable, cq->work_done. If the other thread (for example, from busy_poll) sets it to a value >= budget, this thread will continue to run when it should stop, and cause memory corruption and panic. To fix this issue, save the per-CQ work_done variable in a local variable before napi_complete_done(), so it won't be corrupted by a possible concurrent thread after napi_complete_done(). Also, add a flag bit to advertise to the NIC firmware: the NAPI work_done variable race is fixed, so the driver is able to reliably support features like busy_poll.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/18010ff776fa42340efc428b3ea6d19b3e7c7b21	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6740d8572ccd1bca50d8a1ca2bedc333f50ed5f3	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fe50a9bbeb1f042e756c5cfa7708112c944368de	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
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": [
            "drivers/net/ethernet/microsoft/mana/gdma.h",
            "drivers/net/ethernet/microsoft/mana/mana_en.c"
          ],
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              "versionType": "git"
            },
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              "versionType": "git"
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            "drivers/net/ethernet/microsoft/mana/mana_en.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.83",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "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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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Fix race on per-CQ variable napi work_done\n\nAfter calling napi_complete_done(), the NAPIF_STATE_SCHED bit may be\ncleared, and another CPU can start napi thread and access per-CQ variable,\ncq-\u003ework_done. If the other thread (for example, from busy_poll) sets\nit to a value \u003e= budget, this thread will continue to run when it should\nstop, and cause memory corruption and panic.\n\nTo fix this issue, save the per-CQ work_done variable in a local variable\nbefore napi_complete_done(), so it won\u0027t be corrupted by a possible\nconcurrent thread after napi_complete_done().\n\nAlso, add a flag bit to advertise to the NIC firmware: the NAPI work_done\nvariable race is fixed, so the driver is able to reliably support features\nlike busy_poll."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: mana: Corregir ejecuci\u00f3n en la variable per-CQ napi work_done Despu\u00e9s de llamar a napi_complete_done(), el bit NAPIF_STATE_SCHED puede borrarse, y otra CPU puede iniciar el hilo napi y acceder a la variable per-CQ, cq-\u0026gt;work_done. Si el otro hilo (por ejemplo, desde busy_poll) lo establece en un valor \u0026gt;= budget, este hilo seguir\u00e1 ejecut\u00e1ndose cuando deber\u00eda detenerse, y provocar\u00e1 corrupci\u00f3n de memoria y p\u00e1nico. Para solucionar este problema, guarde la variable per-CQ work_done en una variable local antes de napi_complete_done(), para que no se corrompa por un posible hilo concurrente despu\u00e9s de napi_complete_done(). Adem\u00e1s, agregue un bit de bandera para anunciar al firmware NIC: la ejecuci\u00f3n de la variable NAPI work_done est\u00e1 fija, por lo que el controlador puede soportar de forma fiable funciones como busy_poll."
    }
  ],
  "id": "CVE-2022-48985",
  "lastModified": "2026-08-04T10:17:29.340",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
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          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
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        "source": "nvd@nist.gov",
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    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
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          "options": [
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            {
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            }
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          "role": "CISA Coordinator",
          "timestamp": "2024-10-22T13:17:20.394145Z",
          "version": "2.0.3"
        }
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  "published": "2024-10-21T20:15:10.463",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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    },
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
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          "value": "NVD-CWE-noinfo"
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      "source": "nvd@nist.gov",
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    }
  ]
}

CVE-2022-48985 (GCVE-0-2022-48985)

Vulnerability from cvelistv5 – Published: 2024-10-21 20:06 – Updated: 2026-08-05 08:53

Title

net: mana: Fix race on per-CQ variable napi work_done

Summary

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-10-22 13:17 UTC

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/fe50a9bbeb1f042e7…
https://git.kernel.org/stable/c/6740d8572ccd1bca5…
https://git.kernel.org/stable/c/18010ff776fa42340…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e1b5683ff62e7b328317aec08869495992053e9d , < fe50a9bbeb1f042e756c5cfa7708112c944368de (git) Affected: e1b5683ff62e7b328317aec08869495992053e9d , < 6740d8572ccd1bca50d8a1ca2bedc333f50ed5f3 (git) Affected: e1b5683ff62e7b328317aec08869495992053e9d , < 18010ff776fa42340efc428b3ea6d19b3e7c7b21 (git)
Linux	Linux	Affected: 5.15 Unaffected: 0 , < 5.15 (semver) Unaffected: 5.15.83 , ≤ 5.15.* (semver) Unaffected: 6.0.13 , ≤ 6.0.* (semver) Unaffected: 6.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2022-48985",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-10-22T13:17:20.394145Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-10-22T13:18:43.146Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/microsoft/mana/gdma.h",
            "drivers/net/ethernet/microsoft/mana/mana_en.c"
          ],
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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            "drivers/net/ethernet/microsoft/mana/mana_en.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "versions": [
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.15.83",
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              "status": "unaffected",
              "version": "6.0.13",
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              "version": "6.1",
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          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The bug is in MANA NAPI CQ polling on packet RX/TX completions; remote peers of internet-facing Azure VMs deliver traffic that raises interrupts and schedules the vulnerable mana_poll path. MANA RX NAPI uses weight 1, so remote packet-driven races after napi_complete_done are a network attack path.\nAC:L - After napi_complete_done clears SCHED, a concurrent NAPI (busy_poll or another CPU\u2019s softirq from further packets) can overwrite cq-\u003ework_done; the attacker controls packet rate and can sustain load so the post-complete window is hit reliably. Race guidance treats attacker-influenced concurrent NAPI as AC:L.\nPR:N - Unauthenticated remote traffic to the MANA interface is enough to schedule softirq NAPI and induce the post-complete race; no local account, capabilities, or authentication is required.\nUI:N - Exploitation is driven by packet arrivals and kernel NAPI/softirq processing with no victim user action such as mounting a filesystem or opening a crafted file.\nS:U - Corruption and panic stay inside the guest kernel\u2019s authority on the Azure VM; this is not a VM escape, IOMMU bypass, or other cross-boundary impact.\nC:H - Wrong work_done after complete violates NAPI ownership and enables concurrent CQ polling, double-processing RX buffers, and page/skb UAF-style reuse, which conservatively yields an arbitrary read primitive.\nI:H - The same concurrent CQ/NAPI ownership break causes double dma_unmap/free and heap corruption that can be leveraged for writes and control-flow hijacking, so integrity is High.\nA:H - The fix commit documents memory corruption and panic; NAPI list/state corruption and UAF/oops under concurrent poll produce a full kernel availability loss."
            }
          ]
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      ],
      "providerMetadata": {
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        },
        {
          "url": "https://git.kernel.org/stable/c/18010ff776fa42340efc428b3ea6d19b3e7c7b21"
        }
      ],
      "title": "net: mana: Fix race on per-CQ variable napi work_done",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-48985",
    "datePublished": "2024-10-21T20:06:01.802Z",
    "dateReserved": "2024-08-22T01:27:53.633Z",
    "dateUpdated": "2026-08-05T08:53:15.213Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.