CVE-2026-90079 (GCVE-0-2026-90079)
Vulnerability from cvelistv5
Published
2026-09-17 16:05
Modified
2026-10-19 08:57
Severity ?
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: e53ee4acb220acab6832669334279367b0206af6
Version: e53ee4acb220acab6832669334279367b0206af6
Version: e53ee4acb220acab6832669334279367b0206af6
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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": [
            {
              "lessThan": "c08314f91782983d67af0807ed1360e404ac4a8b",
              "status": "affected",
              "version": "e53ee4acb220acab6832669334279367b0206af6",
              "versionType": "git"
            },
            {
              "lessThan": "a0fcbea79f034f49bdd44915f28938922023458d",
              "status": "affected",
              "version": "e53ee4acb220acab6832669334279367b0206af6",
              "versionType": "git"
            },
            {
              "lessThan": "3b11a77f69980932c3924054d66e565c9a135747",
              "status": "affected",
              "version": "e53ee4acb220acab6832669334279367b0206af6",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "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": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "lessThan": "6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.57",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.57",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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": "2026-10-19T08:57:35.887Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c08314f91782983d67af0807ed1360e404ac4a8b"
        },
        {
          "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": "2026-10-19T08:57:35.887Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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