CVE-2026-90079 (GCVE-0-2026-90079)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:05 – Updated: 2026-09-17 16:05
VLAI
Title
octeontx2-af: fix cn20k mailbox lifetime on repeated rvu_mbox_init()
Summary
In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: fix cn20k mailbox lifetime on repeated rvu_mbox_init() rvu_mbox_init() is called separately for AF-PF mailboxes during probe and for AF-VF mailboxes when SR-IOV is enabled. Each call used to allocate a new ng_rvu object, leaking the first allocation when the pointer was overwritten on the second call. Sharing one ng_rvu across both paths exposed several teardown bugs: the error path freed all cn20k mailbox DMA and kfree()d ng_rvu even when only the failing init type should be unwound, leaving live AF-PF mailbox memory in use after an AF-VF init failure. mutex_init() was also re-run on the AF-VF path while AF-PF mailbox handlers could still hold rvu->mbox_lock. Probe and SR-IOV failure paths did not release cn20k mailbox DMA either, since cleanup only happened in rvu_remove(). Allocate ng_rvu once with devm_kzalloc(), initialize mbox_lock in the same block, unwind only the mailbox memory for the failing init type, and free cn20k mailbox DMA from the probe and pci_enable_sriov() error paths.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e53ee4acb220acab6832669334279367b0206af6 , < a0fcbea79f034f49bdd44915f28938922023458d (git)
Affected: e53ee4acb220acab6832669334279367b0206af6 , < 3b11a77f69980932c3924054d66e565c9a135747 (git)
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Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/marvell/octeontx2/af/cn20k/api.h",
            "drivers/net/ethernet/marvell/octeontx2/af/cn20k/mbox_init.c",
            "drivers/net/ethernet/marvell/octeontx2/af/rvu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
              "version": "e53ee4acb220acab6832669334279367b0206af6",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "e53ee4acb220acab6832669334279367b0206af6",
              "versionType": "git"
            }
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            "drivers/net/ethernet/marvell/octeontx2/af/cn20k/api.h",
            "drivers/net/ethernet/marvell/octeontx2/af/cn20k/mbox_init.c",
            "drivers/net/ethernet/marvell/octeontx2/af/rvu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "6.17"
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              "version": "0",
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            {
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              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-af: fix cn20k mailbox lifetime on repeated rvu_mbox_init()\n\nrvu_mbox_init() is called separately for AF-PF mailboxes during probe\nand for AF-VF mailboxes when SR-IOV is enabled.  Each call used to\nallocate a new ng_rvu object, leaking the first allocation when the\npointer was overwritten on the second call.\n\nSharing one ng_rvu across both paths exposed several teardown bugs:\nthe error path freed all cn20k mailbox DMA and kfree()d ng_rvu even\nwhen only the failing init type should be unwound, leaving live AF-PF\nmailbox memory in use after an AF-VF init failure.  mutex_init() was\nalso re-run on the AF-VF path while AF-PF mailbox handlers could still\nhold rvu-\u003embox_lock.  Probe and SR-IOV failure paths did not release\ncn20k mailbox DMA either, since cleanup only happened in rvu_remove().\n\nAllocate ng_rvu once with devm_kzalloc(), initialize mbox_lock in the\nsame block, unwind only the mailbox memory for the failing init type,\nand free cn20k mailbox DMA from the probe and pci_enable_sriov()\nerror paths."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:05:57.541Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a0fcbea79f034f49bdd44915f28938922023458d"
        },
        {
          "url": "https://git.kernel.org/stable/c/3b11a77f69980932c3924054d66e565c9a135747"
        }
      ],
      "title": "octeontx2-af: fix cn20k mailbox lifetime on repeated rvu_mbox_init()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90079",
    "datePublished": "2026-09-17T16:05:57.541Z",
    "dateReserved": "2026-09-11T19:38:34.785Z",
    "dateUpdated": "2026-09-17T16:05:57.541Z",
    "state": "PUBLISHED"
  },
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      "date": "2026-09-25",
      "epss": "0.00198",
      "percentile": "0.08492"
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    "nvd": {
      "cve": {
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              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/net/ethernet/marvell/octeontx2/af/cn20k/api.h",
                  "drivers/net/ethernet/marvell/octeontx2/af/cn20k/mbox_init.c",
                  "drivers/net/ethernet/marvell/octeontx2/af/rvu.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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                    "versionType": "git"
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              {
                "defaultStatus": "affected",
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                "programFiles": [
                  "drivers/net/ethernet/marvell/octeontx2/af/cn20k/api.h",
                  "drivers/net/ethernet/marvell/octeontx2/af/cn20k/mbox_init.c",
                  "drivers/net/ethernet/marvell/octeontx2/af/rvu.c"
                ],
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                    "version": "7.2.6",
                    "versionType": "semver"
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                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
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        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-af: fix cn20k mailbox lifetime on repeated rvu_mbox_init()\n\nrvu_mbox_init() is called separately for AF-PF mailboxes during probe\nand for AF-VF mailboxes when SR-IOV is enabled.  Each call used to\nallocate a new ng_rvu object, leaking the first allocation when the\npointer was overwritten on the second call.\n\nSharing one ng_rvu across both paths exposed several teardown bugs:\nthe error path freed all cn20k mailbox DMA and kfree()d ng_rvu even\nwhen only the failing init type should be unwound, leaving live AF-PF\nmailbox memory in use after an AF-VF init failure.  mutex_init() was\nalso re-run on the AF-VF path while AF-PF mailbox handlers could still\nhold rvu-\u003embox_lock.  Probe and SR-IOV failure paths did not release\ncn20k mailbox DMA either, since cleanup only happened in rvu_remove().\n\nAllocate ng_rvu once with devm_kzalloc(), initialize mbox_lock in the\nsame block, unwind only the mailbox memory for the failing init type,\nand free cn20k mailbox DMA from the probe and pci_enable_sriov()\nerror paths."
          }
        ],
        "id": "CVE-2026-90079",
        "lastModified": "2026-09-17T17:16:57.210",
        "metrics": {},
        "published": "2026-09-17T17:16:57.210",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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