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FKIE_CVE-2026-93052

Vulnerability from fkie_nvd - Published: 2026-09-17 17:17 - Updated: 2026-09-17 17:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: misc: bcm-vk: Use acquire/release for msgq_inited bcm_vk_sync_msgq() fills the message queue information and then sets msgq_inited. Readers call bcm_vk_drv_access_ok() before accessing the message queues and their cached queue information. atomic_set()/atomic_read() do not order those accesses. A reader can see msgq_inited set while still seeing stale queue information. Use release when publishing the initialized queues and acquire when checking the gate. Keep the clear in bcm_vk_blk_drv_access() as atomic_set(). It closes the gate and does not publish queue state to readers.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1df3926ed8771edf286ff753428b243f334e6041
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4984277bc43f84d7506346a09b29af138246d54a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/61b101c6a150057b6d512421ed108aed16e822ea
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/679cfada6868723ccf162ec3b78c7402ff2405bf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a45d6dd3c11e921882a2e74c7c8710b975f2eaa7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bab66a9e30e39a06f3463b19f8c704386dfd5268
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f7a8f4cbc8cede0be55220367dc52b126e2d39e5
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/misc/bcm-vk/bcm_vk_msg.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "bab66a9e30e39a06f3463b19f8c704386dfd5268",
              "status": "affected",
              "version": "111d746bb4767ad476f80fe49067e3df3d9a9375",
              "versionType": "git"
            },
            {
              "lessThan": "679cfada6868723ccf162ec3b78c7402ff2405bf",
              "status": "affected",
              "version": "111d746bb4767ad476f80fe49067e3df3d9a9375",
              "versionType": "git"
            },
            {
              "lessThan": "f7a8f4cbc8cede0be55220367dc52b126e2d39e5",
              "status": "affected",
              "version": "111d746bb4767ad476f80fe49067e3df3d9a9375",
              "versionType": "git"
            },
            {
              "lessThan": "1df3926ed8771edf286ff753428b243f334e6041",
              "status": "affected",
              "version": "111d746bb4767ad476f80fe49067e3df3d9a9375",
              "versionType": "git"
            },
            {
              "lessThan": "a45d6dd3c11e921882a2e74c7c8710b975f2eaa7",
              "status": "affected",
              "version": "111d746bb4767ad476f80fe49067e3df3d9a9375",
              "versionType": "git"
            },
            {
              "lessThan": "4984277bc43f84d7506346a09b29af138246d54a",
              "status": "affected",
              "version": "111d746bb4767ad476f80fe49067e3df3d9a9375",
              "versionType": "git"
            },
            {
              "lessThan": "61b101c6a150057b6d512421ed108aed16e822ea",
              "status": "affected",
              "version": "111d746bb4767ad476f80fe49067e3df3d9a9375",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/misc/bcm-vk/bcm_vk_msg.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "lessThan": "5.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: bcm-vk: Use acquire/release for msgq_inited\n\nbcm_vk_sync_msgq() fills the message queue information and then sets\nmsgq_inited. Readers call bcm_vk_drv_access_ok() before accessing the\nmessage queues and their cached queue information.\n\natomic_set()/atomic_read() do not order those accesses. A reader can see\nmsgq_inited set while still seeing stale queue information. Use release\nwhen publishing the initialized queues and acquire when checking the gate.\n\nKeep the clear in bcm_vk_blk_drv_access() as atomic_set(). It closes the\ngate and does not publish queue state to readers."
    }
  ],
  "id": "CVE-2026-93052",
  "lastModified": "2026-09-17T17:17:58.657",
  "metrics": {},
  "published": "2026-09-17T17:17:58.657",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1df3926ed8771edf286ff753428b243f334e6041"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4984277bc43f84d7506346a09b29af138246d54a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/61b101c6a150057b6d512421ed108aed16e822ea"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/679cfada6868723ccf162ec3b78c7402ff2405bf"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a45d6dd3c11e921882a2e74c7c8710b975f2eaa7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bab66a9e30e39a06f3463b19f8c704386dfd5268"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f7a8f4cbc8cede0be55220367dc52b126e2d39e5"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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