Vulnerability-Lookup

GHSA-H62Q-3PMG-9366

Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-20 15:31

Details

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

net: mana: Skip redundant detach on already-detached port

When mana_per_port_queue_reset_work_handler() runs after a previous detach succeeded but attach failed, the port is left in a detached state with apc->tx_qp and apc->rxqs already freed. Calling mana_detach() again unconditionally leads to NULL pointer dereferences during queue teardown.

Add an early exit in mana_detach() when the port is already in detached state (!netif_device_present) for non-close callers, making it safe to call idempotently. This allows the queue reset handler and other recovery paths to simply retry mana_attach() without redundant teardown.

Severity

7.5 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-63972"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T16:17:16Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Skip redundant detach on already-detached port\n\nWhen mana_per_port_queue_reset_work_handler() runs after a previous\ndetach succeeded but attach failed, the port is left in a detached\nstate with apc-\u003etx_qp and apc-\u003erxqs already freed. Calling\nmana_detach() again unconditionally leads to NULL pointer dereferences\nduring queue teardown.\n\nAdd an early exit in mana_detach() when the port is already in\ndetached state (!netif_device_present) for non-close callers, making\nit safe to call idempotently. This allows the queue reset handler and\nother recovery paths to simply retry mana_attach() without redundant\nteardown.",
  "id": "GHSA-h62q-3pmg-9366",
  "modified": "2026-07-20T15:31:53Z",
  "published": "2026-07-19T18:31:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63972"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5b05aa36ee24297d7296ca58dfd8c448d0e4cda3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7ae590797f9b5c240aaea5773f5f00977a42a846"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c4152b4e28b3e550ec99351bf900e2c24c2608cc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-63972 (GCVE-0-2026-63972)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-20 13:41

Title

net: mana: Skip redundant detach on already-detached port

Summary

In the Linux kernel, the following vulnerability has been resolved: net: mana: Skip redundant detach on already-detached port When mana_per_port_queue_reset_work_handler() runs after a previous detach succeeded but attach failed, the port is left in a detached state with apc->tx_qp and apc->rxqs already freed. Calling mana_detach() again unconditionally leads to NULL pointer dereferences during queue teardown. Add an early exit in mana_detach() when the port is already in detached state (!netif_device_present) for non-close callers, making it safe to call idempotently. This allows the queue reset handler and other recovery paths to simply retry mana_attach() without redundant teardown.

Severity

7.5 (High)


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

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/c4152b4e28b3e550e…
https://git.kernel.org/stable/c/7ae590797f9b5c240…
https://git.kernel.org/stable/c/5b05aa36ee24297d7…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: fb9f98e1041a30dd5766620a2a64cb472b54caa9 , < c4152b4e28b3e550ec99351bf900e2c24c2608cc (git) Affected: 3b194343c25084a8d2fa0c0f2c9e80f3080fd732 , < 7ae590797f9b5c240aaea5773f5f00977a42a846 (git) Affected: 3b194343c25084a8d2fa0c0f2c9e80f3080fd732 , < 5b05aa36ee24297d7296ca58dfd8c448d0e4cda3 (git) Affected: 6.18.33 , < 6.18.35 (semver)
Linux	Linux	Affected: 7.0 Unaffected: 0 , < 7.0 (semver) Unaffected: 6.18.35 , ≤ 6.18.* (semver) Unaffected: 7.0.12 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/microsoft/mana/mana_en.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c4152b4e28b3e550ec99351bf900e2c24c2608cc",
              "status": "affected",
              "version": "fb9f98e1041a30dd5766620a2a64cb472b54caa9",
              "versionType": "git"
            },
            {
              "lessThan": "7ae590797f9b5c240aaea5773f5f00977a42a846",
              "status": "affected",
              "version": "3b194343c25084a8d2fa0c0f2c9e80f3080fd732",
              "versionType": "git"
            },
            {
              "lessThan": "5b05aa36ee24297d7296ca58dfd8c448d0e4cda3",
              "status": "affected",
              "version": "3b194343c25084a8d2fa0c0f2c9e80f3080fd732",
              "versionType": "git"
            },
            {
              "lessThan": "6.18.35",
              "status": "affected",
              "version": "6.18.33",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "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": "7.0"
            },
            {
              "lessThan": "7.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.35",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.35",
                  "versionStartIncluding": "6.18.33",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.12",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
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          "lang": "en",
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-20T13:41:57.080Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/c4152b4e28b3e550ec99351bf900e2c24c2608cc"
        },
        {
          "url": "https://git.kernel.org/stable/c/7ae590797f9b5c240aaea5773f5f00977a42a846"
        },
        {
          "url": "https://git.kernel.org/stable/c/5b05aa36ee24297d7296ca58dfd8c448d0e4cda3"
        }
      ],
      "title": "net: mana: Skip redundant detach on already-detached port",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-63972",
    "datePublished": "2026-07-19T14:55:58.503Z",
    "dateReserved": "2026-07-19T07:54:57.024Z",
    "dateUpdated": "2026-07-20T13:41:57.080Z",
    "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.

Action not permitted

GHSA-H62Q-3PMG-9366

CVE-2026-63972 (GCVE-0-2026-63972)

Tags

Sightings

Nomenclature